A December windstorm drops a Douglas fir limb on the corner of a stucco house in Coquitlam. It breaks a bedroom window, cracks a section of stucco the size of a door and tears a run of soffit loose. The owner tapes a blue tarp over the hole that night. By morning the tarp has blown half off, and water is running down the inside of the wall below the window, behind stucco that looked undamaged the day before.
That second night is the expensive one. Emergency weatherproofing in BC is the work of closing a damaged exterior so the rain stops getting in while the permanent repair is scoped, approved and scheduled. Done properly, it holds for weeks while the claim catches up, and a window-and-stucco repair stays a window-and-stucco repair instead of becoming a wall rebuild.
How do you weatherproof a damaged exterior in an emergency?
Emergency weatherproofing closes every opening in the envelope with temporary materials that shed water, survive wind and come off without causing new damage. On a BC house that usually means reinforced poly lapped like shingles and held with screwed wood battens, plywood over broken glass and holes, and temporary membrane at torn flashing. The goal is to have it in place within 24 hours, then check it after every storm.
Why the night after the damage costs more than the storm
From November to March, Metro Vancouver and most of Vancouver Island get rain on more days than not, and the big fall systems arrive with strong wind. Exposed sites such as Tsawwassen, the White Rock hillside and the upper slopes of the North Shore take the hardest gusts. An open wall in that weather does not get a chance to dry.
Much of the local housing stock makes it worse. Face-sealed stucco from the 1980s and 1990s sits tight against building paper and sheathing with no drainage gap, so water that gets in behind it stays there. Insulation soaks it up. Drywall wicks it upward. Mould can start on wet drywall paper within 24 to 48 hours, and every day the wall stays wet pushes the eventual repair from cleaning toward replacing wood.
There is an insurance reason too. The statutory conditions in BC's Insurance Act require the insured to take reasonable steps to prevent further loss after damage. Water that got in because nobody covered the opening for three days is the kind of loss an adjuster can question.
What good emergency weatherproofing looks like
Temporary protection that lasts a month and one that fails in the first gust usually differ in two things: how the sheets are lapped and how they are fastened.
Sheets go on from the bottom up, each upper sheet lapped over the one below by at least a foot, so water running down the face always lands on the outside of the next sheet. The top edge is the weak point. It should tuck under intact cladding, a flashing or the soffit above, or be held tight with a batten and sealed so rain cannot run in behind it.
Rope through the grommets of a big-box tarp holds until a strong gust tears the grommets out. Wood strapping, 1x3 or 2x2, screwed through the sheet into framing or sheathing holds the whole edge. Material matters as well. String-reinforced poly or a heavy-duty tarp outlasts the thin blue kind, which goes brittle in sunlight and shreds in wind within weeks. Broken windows and larger holes get plywood, 1/2 or 5/8 inch, screwed rather than nailed, with poly behind it.
Every fastener through stucco or siding is a new hole. A crew that already knows the shape of the permanent repair puts its screws inside the area that will be cut out, so the temporary work leaves nothing extra to fix.
A wall wrapped tight in poly from top to bottom can do more harm than one under a leaky tarp if the wall behind it is already wet. Sealing all four edges traps water in the assembly with nowhere to go. Leave the bottom of the cover open to drain. If the wall took on water, it needs to be opened or put on drying equipment as well as covered.
Different damage, different temporary fix
Broken glass in a window or sliding door is the most common call after a windstorm. The opening gets plywood and poly, and someone should check the sill and the wall below it, because water often got in before anyone noticed the glass.
Cladding torn away, whether siding panels peeled by wind or stucco broken by a branch, exposes the sheathing paper. That gets poly or temporary membrane tucked under the cladding course above the damage and lapped down over the course below.
Lifted or missing flashing at window heads, deck ledgers and parapets looks like the smallest problem and is often the most dangerous one. A 30 cm gap in a head flashing can put water straight into the framing over a window. Self-adhered membrane can close it if the surface can be dried and is warm enough for the product to stick. In cold, wet weather, poly held with a batten is the more reliable cover.
Fire damage brings its own list. Firefighters break windows and cut openings to ventilate, and the suppression water is already inside the walls. Board-up and site security should happen the same day the fire department releases the property. Our fire and flood restoration crews treat the board-up as the first stage of the rebuild, with photos and moisture readings taken before anything is covered.
Impact from a vehicle or a large tree is a structural question before it is a weatherproofing one. If studs, posts or a beam are broken, the wall needs temporary shoring first, and an engineer usually needs to see it before the permanent repair is designed.
A damaged roof needs a roofer. Walls, windows, soffits, balconies and the flashings between them are envelope work, and that is where a restoration crew starts.
What you can do before a crew arrives
Stay off ladders in wind and rain. If power lines are down or touching the house, call BC Hydro and keep everyone clear. If water is coming through a wall near outlets or light fixtures, turn that circuit off at the panel if you can reach it safely.
Photograph everything before it is moved or covered: the outside damage, the inside of the wall, wet flooring, damaged contents. Move furniture and belongings away from the wet wall and put down towels or containers to catch water.
A ground-floor window or a low section of siding is something many homeowners can cover with plywood or poly for one night. Anything higher is work for a crew. WorkSafeBC requires fall protection when a worker could fall 3 metres or more, which on most BC houses means anything above the first floor.
How insurance treats emergency weatherproofing
On most home and strata policies, the reasonable cost of emergency protection after an insured event is part of the claim. Call your insurer or broker the same day, keep every receipt, and tell the adjuster what was done and when. Do not start permanent repairs before the adjuster has seen the damage unless they approve it.
Ask your contractor for an emergency invoice that is separate from the repair estimate, itemized by materials, labour hours and equipment such as scaffolding or a lift. Adjusters tend to process a clear mitigation invoice quickly, while a single combined number can sit in review. On a house, emergency board-up and temporary protection usually runs from several hundred dollars to a few thousand, depending on height, access and the number of openings. Access equipment is often the biggest line.
On a strata building, owners report the damage to the property manager, and the strata corporation's master policy and bylaws decide who arranges and pays for what. Our article on the insurance restoration timeline in BC walks through how a claim moves from first call to final payment.
The timeline after exterior damage
First 24 hours. Openings closed, photos taken, electrical hazards made safe, standing water extracted. On a strata building, the property manager and the insurer are notified.
First week. The adjuster visits. The wall is opened far enough to find the edges of the wet materials, drying equipment runs, and the temporary protection is checked after every rain and wind event. Our guide to water damage in the first week after a storm covers this stage in detail.
Full restoration. On a house, a cladding and window repair on one elevation typically takes three to eight weeks once the scope is approved. Stucco and most sealants need temperatures above about 5°C to cure, so winter work may need tenting and heat, which adds time. A strata building with damage across several units can run for months. That is why emergency weatherproofing has to be built to last. It often stays up for a month or more before the permanent building envelope repair starts.
Who should put up the temporary protection
The best time to plan the permanent repair is while the temporary protection is going up. A crew that knows how the wall is built will lap the poly under the right course, fasten where the repair will cut, and record moisture readings that the adjuster and the repair estimate both depend on.
MV Construction has handled storm, fire and water restoration on houses and strata buildings across Greater Vancouver and Vancouver Island for more than 10 years. Our crews are fully licensed, WCB-insured and bonded, we take emergency calls 24/7 within Greater Vancouver, and our workmanship carries a written warranty.
If your exterior is open to the weather right now, call (778) 375-5672. If the damage is already covered and you need the permanent repair scoped, request a free written estimate and we will set out the full scope, price and timeline in writing before work begins.
