Whole-building recaulk vs. spot sealant repair: how a Vancouver strata decides
Spot repair fixes only the joints that have already failed and looks cheap on the first invoice. But on a facade where the sealant is all the same age, fixing one joint just moves the next leak a few metres over, and every visit pays the high fixed cost of rigging access again. A whole-building recaulk renews every joint of a type in one mobilization, so the access cost is paid once and the cost per metre drops. Over the life of the sealant the cheap-looking option is often the expensive one, because you pay to hang crews off the building over and over while water keeps finding the next worn joint.
The deciding question is whether your failure is isolated or the whole sealant run has reached end of life. A single damaged joint on a wall that was recaulked two years ago is a spot repair, plain and simple. A tower from the leaky-condo era, original sealant chalking and hardening across every elevation, leaking in more than one place, is a full recaulk that should be sitting in the depreciation report. Most buildings are one or the other, and a joint-by-joint condition survey tells you which. Here is how to read your own building.
The trap in the cheap-looking option
When a suite reports a leak, the natural response is to fix the joint that leaked and move on. On a newer building with an otherwise sound facade, that is the right call. But on an aging Metro Vancouver tower, the sealant on a given elevation almost always went on at the same time, which means it is all reaching the end of its life together. Replace the one joint that failed, and the joints on either side of it are still worn out. The next leak turns up a few metres away within a season or two, another crew mobilizes, another invoice arrives, and the cycle repeats.
So the spot repair that looked cheap becomes a string of repairs that, added up, cost more than doing the whole facade once. And the building spends those years with most of its joints open or near-open to wind-driven rain. On the coast that is not a small thing. Water that gets past a failed joint does not stay at the surface. It moves into the wall assembly, and by the time a resident sees a stain on the ceiling the water has often been travelling inside the wall for a while.
The trap is that the first invoice is real and the future invoices are not visible yet. A council looking at one small quote against one large quote will feel the pull of the small one. The job of the condition survey, and of an honest contractor, is to show what the small quote actually leads to on a same-age facade: a repeat, then another repeat, then a recaulk anyway, with years of water exposure in between.
Why access cost drives the math on a high-rise
The reason a full recaulk usually wins on cost is not the sealant, it is the access. Reaching joints on a tower means rigging rope access or setting up a swing stage under WorkSafeBC Occupational Health and Safety Regulation Part 11, which governs fall protection. That setup is a large fixed cost paid every time a crew mobilizes, whether they seal ten metres of joint that day or a thousand. Spot repairs pay that fixed access cost over and over as failures appear one at a time. A whole-building recaulk pays it once and spreads it across every metre of joint on the building.
That is the whole economic argument. When access is a big share of the total bill, and on a high-rise it usually is, doing all the joints in one setup makes the cost per metre far lower than a series of small visits. Think of the fixed access cost as a floor under every visit. Spot repair keeps paying that floor to seal a handful of metres. A full program pays the floor once and then sealing more joints costs only the labour and material to seal them, which is where the per-metre cost collapses.
There is a human side too. Every mobilization on an occupied building means resident notices, balcony access windows, and crews working past people's windows for a stretch. One coordinated program means one round of that disruption. A string of spot repairs means going through it again and again. For a strata council managing residents as well as a budget, fewer disruptions is a real benefit, not a footnote. If your building is a low-rise where crews can reach the joints from ladders or a small lift, the access cost is lower and the math shifts a little toward spot repair being viable for longer. On a mid-rise or tower it rarely does.
How sealant actually fails, and why neighbours go together
Sealant does not fail in one way. It fails in three, and knowing which one you are looking at tells you a lot about whether the problem is local or building-wide.
Adhesion failure is when the sealant lets go of the joint face. The bead is still intact, but it has pulled away from the concrete, metal, or glazing on one side, leaving a gap you can often see as a fine dark line along the edge. This usually points to a bond problem: the face was not clean when the sealant went on, no primer was used where one was needed, or the sealant has aged to where it can no longer hold.
Cohesive failure is when the sealant tears within itself. The bond to both faces holds, but the bead splits down the middle. This often means the joint moved more than the sealant could stretch, which points back to the wrong movement class for the joint or a bead with no backer rod, bonded on three sides so it could not flex.
General degradation is the slow one. Ultraviolet light from the sun breaks down the sealant over years. The surface chalks to a dusty film, the material hardens, and it loses the elasticity that let it follow the joint as the building moves with heat and wind. A hardened bead does not have to be split or peeled to be finished. It has simply stopped doing its job.
Here is the part that decides the whole recaulk question. On one elevation the sealant almost always went on at the same time, from the same product, applied by the same crew, and then it sat in the same sun and the same rain for the same number of years. So it ages at the same rate. When one joint reaches adhesion failure from age, or chalks and hardens past the point of usefulness, the joints beside it are at the same point in their life. They are next. That is why fixing one aged-out joint buys so little: you have replaced the first domino, not stopped the row from falling.
How a condition survey classifies joints by remaining life
The way you avoid guessing is a proper condition survey. On a high-rise that means inspecting joints up close by rope access, not judging them from the ground with binoculars, which only gives a rough preliminary picture. A useful survey maps every joint on the building and puts it into a condition class: failed and leaking, in adhesion or cohesive failure but not yet leaking, degraded but holding, or sound with real life left. It records joint type, elevation, exposure, and what it takes to reach each area.
That map is what turns the recaulk-versus-spot question from an argument into a decision. If most of the joints on most elevations are in the failed or degraded classes, the sealant system as a whole is at end of life and a full program is the rational call. If the building is mostly sound with one or two damaged joints, spot repair is correct and the survey proves it. Either way the council is deciding from the state of the whole facade, not from the single leak that happened to get reported.
The survey also carries straight into planning. Classing joints by remaining life and by elevation is exactly the information a phased program needs to sequence the work, and it is the information the depreciation report needs to fund it. A council that starts with a survey ends up with a scope, a priority order, and a number the reserve planner can use. A council that starts with a round-number reseal quote ends up with none of that.
Correct recaulk method and specification
A recaulk is only as good as the joint prep, and the prep is where corners get cut. The correct sequence is not complicated, but every step earns its place.
First, full removal. All of the old sealant comes out, back to sound substrate. This is not optional, and here is why: new sealant does not bond reliably to old cured sealant. Laying a fresh bead over the existing caulk, called capping, gives you a bead that is only holding onto the old material, which is itself letting go. It looks finished on the day and fails within a short time. If a proposal talks about capping over old caulk, that alone is reason to reject it.
Second, clean the joint faces so the new sealant has sound, contaminant-free surfaces to bond to. Third, install fresh backer rod at the correct depth. The backer rod is doing real structural work in the joint. It sets the sealant depth to match the joint width following ASTM C1193 joint geometry, typically a minimum sealant depth of about a quarter inch, and it produces the two-sided bond and the hourglass bead profile that let the joint stretch and compress without tearing. Just as important, it prevents three-sided adhesion. If sealant bonds to the back of the joint as well as the two faces, it cannot flex, and it tears the first time the joint moves. No backer rod line item in a proposal is a red flag.
Fourth, prime where the substrate requires it, so the sealant bonds properly to that material. Fifth, apply an appropriate sealant and tool it to a concave profile. For envelope joints that move, the sealant should meet ASTM C920, and Class 25 is typical, meaning it is rated to handle joint movement of plus or minus twenty-five percent. That movement class has to match the joint, because a bead that cannot stretch far enough will fail cohesively no matter how well it was installed. To confirm the work actually bonded, a good program includes ASTM C1521 field hand-pull adhesion testing, where a technician cuts and pulls sample sections to verify the new sealant is holding to the prepared faces. That test is the difference between hoping the bond is good and knowing it. For more on choosing the sealant itself, see our comparisons of polyurethane versus silicone and polyurethane versus hybrid MS sealant.
Water-entry risk and how water travels through the assembly
The reason any of this matters is water, and water on the BC coast is not gentle. Wind-driven rain off the ocean does not fall straight down onto a joint, it is pushed sideways against the face of the building with pressure behind it. A joint that is merely tired, not yet visibly failed, can still let that driven rain past.
Once water is past the sealant it does not stay put. It travels laterally and downward through the wall assembly, following gaps and gravity, and it can surface inside a suite a fair distance from where it actually entered. This is why chasing a stain to the joint directly behind it can miss the real entry point, and why the leaky-condo era did so much damage before anyone saw it inside. Water was getting into wall assemblies and sitting there, rotting sheathing and framing on wood-frame buildings, long before a resident noticed.
That is the case against leaving same-age joints open. Every joint you have not renewed on an end-of-life facade is a potential entry point, and the damage from the ones that let water in is not limited to the joint. A whole-building recaulk closes every failing and at-risk joint in one program, which is the only way to actually lower the building's water-entry risk rather than move it a few metres over. If water is already getting into the assembly, sealant work sits alongside broader building envelope repair and leak and water ingress repair, since the joint may not be the only thing that needs attention.
Warranty and the record you leave behind
There is a paperwork side to this that strata councils feel later. A whole-building recaulk is a single documented program with one workmanship warranty covering all the joints, one dated point at which the sealant was renewed, and a clean line item for the depreciation report. When the next council or the next reserve planner asks when the sealant was done and what it should last, there is a clear answer.
A string of spot repairs leaves the opposite: scattered records, small separate warranties on different joints with different dates, and no single point at which the sealant system was renewed. Five years on, nobody can say what condition the facade is in without another survey, because the history is a pile of small invoices rather than one program. For a building that has to plan its reserve responsibly, a clean, dated recaulk record is genuinely worth having. It is an asset in the file, not just a receipt.
The depreciation report and the Contingency Reserve Fund
This is where the decision meets the rules that govern BC stratas, and it is the part to get right. Under the Strata Property Act and its regulations, most BC strata corporations must obtain a depreciation report, which is a reserve-fund study that projects major repair and replacement costs over the coming years and sets out how the Contingency Reserve Fund will pay for them. Sealant renewal on the building envelope is exactly the kind of scheduled, predictable facade item that a depreciation report is built to plan for.
A whole-building recaulk fits that planning model cleanly. It is a known scope with a known cost and a known next-cycle renewal date, which is what a reserve study wants. A string of unbudgeted spot repairs fits it badly, because it shows up as recurring operating charges with no clear renewal date and no plan behind it. So the depreciation report is not just paperwork that reflects the decision; it is often the trigger for it. When the report flags the sealant cycle as due, a funded recaulk program is the plan the report is anticipating.
The requirements around depreciation reports have changed in recent years, including the renewal cycle, which buildings are exempt, and the details of how reserves and levies must be handled. Those specifics are not something to assume from a web page. If a full recaulk is likely to need funding beyond what the reserve holds, a special levy is commonly approved by a three-quarters vote resolution at a general meeting, but you should confirm the current voting threshold, the depreciation-report interval, and any exemptions that apply to your building with your licensed strata property manager or a strata lawyer. Get the funding path confirmed before you commit to a scope or a schedule. This page is general building-science information, not legal or financial advice for your specific strata.
Phasing a full recaulk over more than one year
A full recaulk does not have to be paid for in a single year. When the reserve cannot cover the whole facade at once, or when a large special levy is not workable, the program can be phased across two to three years. The important thing is what drives the phasing order.
It should be water-intrusion risk, not just budget convenience. The condition survey ranks elevations and joint types by how likely they are to admit water, and the worst-performing faces get done first. That way the building is never left carrying a failing, water-admitting elevation while a sound one waits its turn. Phasing done this way is a planned, sequenced version of the whole-building program. It is deliberate, it renews entire elevations in a known order, and it comes with the same clean records and warranty structure. That is a different thing from reactive spot repair, which lets the leaks decide the order and never actually gets ahead of the failures. Phasing by risk stays ahead of the water; spot repair chases it.
When spot repair is genuinely the right move
None of this means spot repair is always wrong. There are two clear cases where it is exactly right, and a good contractor will tell you so rather than sell you a program you do not need.
The first is a genuinely isolated failure on an otherwise sound, recently sealed facade. A single joint cut open by another trade, hit by impact, or failed early from a local defect, on a building whose sealant is young and holding everywhere else, is a spot repair. Renewing the whole run here would waste reserve money on joints with years of life left. Remove the damaged section back to sound sealant, prep it correctly, and tie a fresh tooled bead into the existing work.
The second is an emergency stop-gap. When water is coming into a suite right now, the immediate job is to stop it and limit interior damage, so a targeted spot repair at the source is the responsible first step even on an end-of-life facade. The rule is simple: a stop-gap is not the fix. If the joint failed because it aged out, its neighbours are aging out too, and the spot repair only buys time until the funded program starts. Treating the stop-gap as the end of the job is the mistake. Used honestly, spot repair is either the correct permanent answer on a sound building or a bridge to a program on an aging one.
How to read a recaulk proposal
By the time a proposal reaches the council, most of the decisions that matter have already been made in how it was written. A serious proposal is built on a joint-by-joint condition survey, not a round number for the building. The method should spell out full removal of old sealant, backer rod with a stated depth, priming where required, and tooling to a concave profile, and it should name the sealant by ASTM C920 and movement class instead of calling for generic caulk. Look for ASTM C1521 field adhesion testing, a stated access method with the WorkSafeBC fall-protection plan, and one clear dated workmanship warranty.
Two things should stop you cold. One is any mention of capping a new bead over old caulk, which is a built-in failure. The other is a spot-repair scope proposed for a facade the survey shows is uniformly at end of life, which is selling you a chase. If the proposal is missing the survey, the backer rod line, the adhesion testing, or the warranty, send it back and ask for those before you approve the scope. You can compare our two service tracks, single repairs and full programs, on our sealant and caulking service page, and the full sealant and caulking resource hub covers product choices in more depth.
The two approaches compared
Whole-building recaulk
Remove and replace the sealant on all joints of a given type across the building in one program: strip to the substrate, clean the joint faces, install fresh backer rod at the correct depth, prime where required, and apply new sealant tooled to a concave profile.
Spot sealant repair
Replace sealant only at the specific joints that have visibly failed or are actively leaking, and leave the rest in place until it fails in turn. Correct method still applies at each joint: full removal, clean faces, new backer rod, prime, tool.
Four Metro Vancouver scenarios
The choice looks abstract until you put it on a real building. Here are four situations we see across the region, with the call and the honest reason behind it. One of them is a spot repair, because sometimes that is the right answer.
1990s concrete tower, Burnaby Metrotown
A twenty-plus-storey concrete strata from the mid-1990s, original sealant still in place, now showing leaks on two different elevations within the same year. A ground-level look shows chalking and hardened beads on several faces.
Call: Whole-building recaulk, phased if needed.
All the sealant is the same age and the leaks on two elevations confirm the system as a whole has aged out, not that a few joints are unlucky. Chasing this with spot repairs would mean paying the access cost again every season while water keeps finding the next worn joint. A single program, phased by elevation if the reserve needs it, renews the facade and gives the strata one dated warranty and one clean depreciation-report entry.
Recently recaulked mid-rise, North Vancouver
A mid-rise recaulked in full about two years ago. One window-perimeter joint on the third floor is torn open where a contractor doing balcony work cut into it. Every other joint on the building is sound and well within its service life.
Call: Spot repair. This is the honest case for the other option.
The run is young and sound, and the failure is physical damage in one spot, not age. Renewing the whole building here would waste reserve money on joints with years of life left. The right move is to remove the damaged section back to sound sealant, clean, fit new backer rod, prime if required, and lay a fresh tooled bead that ties into the existing work. Spot repair is correct precisely because the rest of the facade does not share the fault.
Active leak into a suite today, downtown Vancouver
A downtown Vancouver tower with a suite reporting water coming in during a wind-driven rain event this week. The building is old enough that the sealant is likely near end of life, but there is no funded recaulk program and no completed condition survey yet.
Call: Spot stop-gap now, funded recaulk soon.
The immediate job is to stop water from damaging the interior, so a targeted spot repair at the source joint is the responsible first step. That is a stop-gap, not the fix. In parallel the strata should commission a condition survey, get the sealant renewal into the depreciation-report planning, and fund a whole-building program. Treating the stop-gap as the end of the job is the classic mistake: the next leak on that same-age facade is already on its way.
Reserve-limited strata, Coquitlam
An older strata in Coquitlam whose condition survey shows most joints at or near failure across all four elevations, but whose Contingency Reserve Fund cannot cover the whole facade in a single year without an uncomfortably large special levy.
Call: Phased full recaulk, sequenced by water-intrusion risk.
This is a full recaulk, just spread across two to three years. The survey ranks elevations and joint types by how likely they are to admit water, and the worst-performing faces get done first so the building is never left with a failing, water-admitting elevation while a sound one waits. Phasing is a planned, sequenced version of the whole-building program, not reactive spot repair. The strata should confirm the funding path, including any special-levy vote, with its licensed strata property manager.
Decision framework for a strata council
| Question | Recommendation | Reason |
|---|---|---|
| Is the sealant the same age across the facade? | Full recaulk | If the whole run went on at once, it is all reaching end of life together. Fixing one joint just moves the next leak a few metres over. Do them together. |
| Are leaks showing in more than one location? | Full recaulk | Multiple leaks on one facade are a sign the sealant system as a whole has failed, not that a few joints are unlucky. Spot repairs will chase failures for years. |
| Truly isolated failure on a recently sealed wall? | Spot repair | A single damaged joint on an otherwise sound, recently sealed facade can be repaired on its own without renewing the whole run. |
| How does the access cost compare to the sealant cost? | Recaulk if access dominates | On a high-rise, rigging rope access or a swing stage is a large fixed cost. When access dominates the bill, doing all the joints in one setup is far cheaper per metre than repeated small visits. |
| Is the depreciation report flagging the sealant cycle? | Plan a full recaulk | If the reserve study has the sealant renewal due, a funded whole-building program is the plan the report anticipates, not a string of unbudgeted spot repairs. |
| Is there active water entry into suites right now? | Spot repair now, recaulk soon | Stop the active leak immediately to limit interior damage, then schedule and fund the full program. The stop-gap buys time; it is not the fix. |
| Can the reserve fund the whole facade in one year? | Phased recaulk | If the money is not there for the full building at once, phase the recaulk by water-intrusion risk. Renew the worst-performing elevations first, fund the rest over two to three years. |
| Has a condition survey classified joint remaining life? | Survey before deciding | Without a joint-by-joint survey you are guessing from the one leak you know about. The survey tells you how much of the facade is at or near failure, which settles the choice. |
| Was the failed joint physically damaged rather than aged out? | Spot repair | Impact damage, a botched prior repair, or trade damage during other work is a local problem. Repair that joint; do not renew a sound run over it. |
Questions to ask before you approve the scope
Before the council votes on any sealant scope, run the proposal through this list. Each item comes with the red-flag answer that should make you pause and ask for more before you sign.
Is there a condition survey that classifies every joint by remaining life and elevation?
Red flag: A quote to reseal the building with no survey behind it. Without it, nobody knows how much of the facade is actually at end of life, and the scope is a guess.
Does the method call for full removal of the old sealant down to sound substrate?
Red flag: Any language about applying a new bead over the existing caulk. New sealant does not bond reliably to old cured sealant, so capping over old caulk is a built-in failure.
Is there a backer rod line item, with the correct rod type and depth for each joint?
Red flag: No backer rod in the scope. Without backer rod at the right depth you get three-sided adhesion and no room for the joint to move, which tears the sealant early.
Is field adhesion testing included to verify the new bond?
Red flag: No hand-pull adhesion testing (ASTM C1521) written into the program. Without it, nobody confirms the new sealant actually bonded to the prepared faces.
Is the sealant specified by standard and movement class for envelope joints?
Red flag: A generic "high-quality caulk" with no ASTM C920 reference and no movement class. Envelope joints move, so the product class has to match the joint, not just the colour.
On a same-age facade, is a full program proposed rather than a few joints?
Red flag: Spot repair proposed on a facade where all the sealant is the same age and the survey shows widespread near-failure. That is a chase, not a fix.
Is there one clear, dated workmanship warranty document for the program?
Red flag: No written warranty, or a vague verbal promise. A recaulk should leave one dated warranty and a clean record the next council and reserve planner can rely on.
For a high-rise, is the access method and WorkSafeBC fall-protection plan stated?
Red flag: No mention of how crews reach the joints or how fall protection is handled. Access is most of the cost and all of the safety exposure, so it belongs in the proposal.
Quick answers
What is the difference between a full recaulk and spot sealant repair?
A full recaulk, or whole-building recaulk, removes and replaces the sealant on all joints of a given type across the building in one coordinated program. Every joint is stripped to the substrate, cleaned, fitted with fresh backer rod, primed where needed, and sealed with a new bead tooled to a concave profile. Spot sealant repair replaces sealant only at the specific joints that have visibly failed or are leaking, and leaves the rest in place. The core difference is scope: a recaulk renews the whole sealant system at once, while spot repair patches individual failures as they appear. On an aging facade where all the sealant is the same age, that difference decides whether you fix the problem once or chase it for years.
Is spot sealant repair cheaper than a full recaulk?
Per visit, yes. Over the life of the sealant, usually not. The reason is access. On a Metro Vancouver high-rise, rigging the rope access or swing stage to reach the joints is a large fixed cost that is paid every time a crew mobilizes, regardless of how many metres of joint they seal that day. When failures come one at a time on an aging facade, spot repair pays that access cost over and over. A full recaulk pays it once and spreads it across every metre of joint on the building, which makes the cost per metre far lower. Spot repair looks cheaper on the first invoice and often turns out to be the more expensive route by the time the whole facade has been done piecemeal.
When should a strata do a whole-building recaulk instead of spot repairs?
When the sealant is the same age across the facade and is reaching end of service life, when leaks are appearing in more than one location, or when the depreciation report has the sealant cycle due for renewal. In all three cases the sealant system as a whole has reached the end of its life, and repairing individual joints just moves the next leak a few metres over. A condition survey confirms this by classifying joints by remaining life: if most of the facade is at or near failure, a single coordinated program is the rational call. Spot repair is reserved for a genuinely isolated failure on an otherwise sound, recently sealed wall, or as an emergency stop-gap before a full program.
Recaulk program questions
What is the difference between a full recaulk and spot sealant repair?
A full recaulk, or whole-building recaulk, removes and replaces the sealant on all joints of a given type across the building in one coordinated program. Every joint is stripped to the substrate, cleaned, fitted with fresh backer rod, primed where needed, and sealed with a new bead tooled to a concave profile. Spot sealant repair replaces sealant only at the specific joints that have visibly failed or are leaking, and leaves the rest in place. The core difference is scope: a recaulk renews the whole sealant system at once, while spot repair patches individual failures as they appear. On an aging facade where all the sealant is the same age, that difference decides whether you fix the problem once or chase it for years.
Is spot sealant repair cheaper than a full recaulk?
Per visit, yes. Over the life of the sealant, usually not. The reason is access. On a Metro Vancouver high-rise, rigging the rope access or swing stage to reach the joints is a large fixed cost that is paid every time a crew mobilizes, regardless of how many metres of joint they seal that day. When failures come one at a time on an aging facade, spot repair pays that access cost over and over. A full recaulk pays it once and spreads it across every metre of joint on the building, which makes the cost per metre far lower. Spot repair looks cheaper on the first invoice and often turns out to be the more expensive route by the time the whole facade has been done piecemeal.
When should a strata do a whole-building recaulk instead of spot repairs?
When the sealant is the same age across the facade and is reaching end of service life, when leaks are appearing in more than one location, or when the depreciation report has the sealant cycle due for renewal. In all three cases the sealant system as a whole has reached the end of its life, and repairing individual joints just moves the next leak a few metres over. A condition survey confirms this by classifying joints by remaining life: if most of the facade is at or near failure, a single coordinated program is the rational call. Spot repair is reserved for a genuinely isolated failure on an otherwise sound, recently sealed wall, or as an emergency stop-gap before a full program.
Why is piecemeal sealant repair a water-entry risk?
Because fixing one joint does nothing for the same-age joints right beside it. On a facade where the whole sealant run went on at the same time, the joints are all degrading together. Replace the one that failed and the adjacent joints are still at the end of their life, so the next leak appears a short distance away within a season or two. Meanwhile every joint you have not touched is an open or near-open path for wind-driven rain, and on the BC coast water that enters a joint travels sideways into the wall assembly before it shows up inside a suite. Piecemeal repair leaves most of that risk in place. A full recaulk closes every failing and at-risk joint at once, which is why it carries the lowest ongoing water-entry risk.
How does building access affect the recaulk versus spot repair decision?
It is often the deciding factor on a high-rise. Reaching the joints means rigging rope access or setting up a swing stage under WorkSafeBC fall-protection rules, and that access is a large fixed cost that has to be paid each time a crew mobilizes, whether they seal ten metres or a thousand. Spot repairs trigger that cost repeatedly as failures appear one by one. A whole-building recaulk pays the access cost once and does all the joints in that single setup, so the fixed cost is spread thin across the entire program. When the access cost is a big share of the total bill, which it usually is on a tower, doing everything in one mobilization is far more economical than a series of small visits, and it is less disruptive to residents.
How does sealant actually fail, and why do joints of the same age fail together?
Sealant fails in three main ways. Adhesion failure is when the sealant lets go of the joint face and pulls away from the substrate. Cohesive failure is when the sealant tears within itself, splitting down the middle of the bead. General degradation is the slow loss of performance from UV exposure: the surface chalks, the material hardens, and it stops stretching to follow the joint as it moves. On one elevation the sealant almost always went on at the same time from the same product, and it sees the same sun and rain, so it ages at the same rate. That is why fixing one joint does not buy much: the joints on either side are at the same point in their life and are next in line to fail.
What is the correct method for a recaulk, and why does capping over old caulk fail?
The correct method removes all the old sealant down to sound substrate, cleans the joint faces, installs fresh backer rod at the correct depth, primes where the substrate requires it, and applies new sealant tooled to a concave profile. The backer rod matters: it sets the sealant depth for the joint width per ASTM C1193 geometry (typically a minimum of about a quarter inch of sealant depth), prevents three-sided adhesion, and gives the two-sided bond and hourglass bead shape that lets the joint move without tearing. New sealant does not bond reliably to old cured sealant, so laying a fresh bead over the existing caulk (capping) is a failure waiting to happen. That is why full removal is not optional. Good programs also run ASTM C1521 field hand-pull adhesion tests to confirm the new bond, and specify an ASTM C920 sealant, commonly Class 25, for the movement envelope joints see.
Can a whole-building recaulk be phased over more than one year?
Yes, and it often is. A condition survey classifies the joints by remaining life and by elevation, which lets a strata prioritise the worst-performing faces first and fund the rest over two to three years from the reserve. The rule that governs the phasing is water-intrusion risk, not just budget convenience: the elevations and joint types most likely to leak get done first, so the building is not left with a failing, water-admitting face while a sound one waits. Phasing is a planned, sequenced version of a full recaulk, which is different from reactive spot repair, because it renews whole elevations in a deliberate order rather than chasing individual leaks. Confirm the funding and any levy vote with your strata property manager before committing to a schedule.
What should a strata get in a sealant condition assessment before deciding?
A useful assessment maps every joint on the building and classifies it by condition and remaining life, so the strata sees how much of the facade is at or near failure rather than guessing from the one leak they know about. It should identify which joints are in adhesion failure, which are in cohesive failure, and which are degraded but not yet leaking, and it should note joint types, exposure, and access requirements. That gives real scope and priority for a recaulk program and the information the depreciation report needs to fund it. On a high-rise the survey is done by rope access so joints can be inspected up close, not judged from the ground with binoculars, which only gives a rough preliminary picture.
How do the depreciation report and reserve fund fit into this decision?
Under the Strata Property Act and its regulations, most BC strata corporations must obtain a depreciation report, which is a reserve-fund study that projects major repair and replacement costs and how the Contingency Reserve Fund will pay for them. Sealant renewal is exactly the kind of scheduled facade item such a report is meant to plan for, and a whole-building recaulk fits that model far better than a string of unbudgeted spot repairs. The requirements for depreciation reports have changed in recent years, including the renewal cycle and any exemptions, so this is one to confirm rather than assume. Ask your licensed strata property manager or a strata lawyer for the current interval, any exemptions that apply to your building, and the voting threshold for funding, since a major expenditure or special levy is commonly a three-quarters vote resolution. This page is general information, not legal or funding advice for your specific building.
When is spot repair genuinely the right choice?
Spot repair is the right choice when the failure is truly isolated on an otherwise sound, recently sealed facade, for example a single joint cut open by trade damage or hit by impact while the rest of the run has years of life left. It is also the responsible first step when water is actively entering a suite right now: you stop the leak immediately to limit interior damage, then plan and fund the full program. The line to watch is whether the surrounding sealant shares the fault. If the joint failed because it aged out, its neighbours are aging out too and spot repair only delays the inevitable. If the joint failed because something happened to it, repairing just that joint is correct.
How should a strata council read a recaulk proposal?
Start with the survey: a serious proposal is built on a joint-by-joint condition assessment, not a round number for the whole building. Check that the method lists full removal of old sealant, backer rod with a stated depth, priming where required, and tooling to a concave profile, and that it names the sealant by ASTM C920 and movement class rather than calling for generic caulk. Look for ASTM C1521 field adhesion testing to verify the bond, a stated access method with the WorkSafeBC fall-protection plan, and one clear dated workmanship warranty. Two answers are red flags: capping a new bead over old caulk, and proposing a few spot repairs on a facade the survey shows is uniformly at end of life. If the proposal is missing the survey, the backer rod, or the warranty, send it back before you approve the scope.
Deciding between a spot fix and a full recaulk?
We survey and classify every joint on your building across Vancouver, North Vancouver, West Vancouver, and Burnaby, so your strata council knows how much of the facade is at end of life and can budget a recaulk instead of chasing leaks one at a time.