Will this pass inspection?

It is built to what the code asks for on your permit, and we leave it visible and sequence to your inspection date rather than boarding ahead. If an inspector raises something, we want the note directly so it is fixed from the actual reason.

Does it matter where the sheet meets the ceiling and floor?

It is the whole job. Left loose at the top or bottom plate, warm air simply goes over or under a perfectly installed sheet. The junction into a vaulted ceiling is the most commonly skipped and the wettest point in the room.

What if there is already a vapour barrier in the wall?

We tie into it, and we check whether there is a second one somewhere that would trap moisture between the two. Older Capilano renovations quite often have both, and finding that before boarding is worth the hour.

Does it matter where the sheets overlap?

Yes. A lap must land on solid framing and be sealed with acoustical sealant compressed between layers. An unsupported lap taped across a cavity flexes with pressure changes and works loose.

Can you install the barrier if someone else did the insulation?

Yes, but we check the insulation first. A barrier over a poorly filled cavity locks the problem in, and once the board is on neither can be corrected without opening the wall.

Vapour Barrier Installation Capilano Edmonton | 6 Mil Poly

Poly and air sealing in Capilano before the board goes on

Alberta winters put a large vapour drive from inside to outside, so the barrier belongs on the warm side of the insulation. Getting the position right matters as much as getting it sealed: a second barrier on the cold side traps moisture in the assembly with no way to dry.

Left ready for inspection before boarding
Seams lapped at framing and sealed, not just taped
Poly on the warm side of the insulation
Electrical boxes poly-hatted and sealed
Window and door returns detailed properly
Rim joists air-sealed before insulating

Poly against smart membranes

Two approaches

Standard 6-mil poly is the common choice in Capilano and works when it is continuous and sealed. A variable-permeance membrane tightens in winter and opens in summer, giving the assembly a drying path in both directions.

When it is worth the difference

Most straightforward walls are fine with poly. Retrofits, assemblies that cannot be fully sealed and some basement details benefit from a membrane. We say which we would use and why rather than defaulting.

Capilano drywall in context

About Capilano

Bounded by the green spaces of the river valley and Gold Bar Ravine, Capilano features beautifully landscaped 1950s-era homes, tree-lined streets and two attractive parks named for prominent early Edmontonians.

What we see in Capilano

In Capilano the drywall work is plaster and lath repair, popcorn and stipple ceiling removal, careful patching into original surfaces. We confirm what your home actually needs on site, in writing, before anything starts.

The rim joist and the bottom plate

Two cold junctions

In an Capilano basement the rim joist and the bottom plate against concrete are where warm air meets cold most directly. Both need sealing before insulation, not after.

Sequencing

Once the insulation and poly are on, neither can be reached without pulling the wall apart. We deal with them first, and we would rather flag a problem there at the quote than discover it behind a finished wall.

Top plates, bottom plates and the perimeter

The edges do the leaking

The continuous joints at the top and bottom of an Capilano wall are longer than every box and lap put together, and they are the easiest to seal well or badly.

What good looks like

Sealant on the plate, poly laid into it and compressed by the framing or the board above, carried around corners rather than cut and butted at every change of direction.

Bathrooms, kitchens and the wet rooms

More moisture, same rules

A Capilano bathroom pushes far more vapour into the wall than a bedroom. The barrier is not different, but the consequences of a gap are larger and show up faster.

Fans and penetrations

The fan housing, the duct and any pot lights all pierce the plane in the wettest room in the house. Those are sealed rather than trimmed around, and we check that the fan actually vents outside rather than into the attic.

Why the warm side, and why only one

Which way the moisture moves

Through an Capilano winter, warm humid indoor air pushes outward through the assembly. A vapour barrier on the warm side stops that moisture before it reaches a cold surface where it can condense.

Two barriers is worse than one

A second barrier on the cold side traps moisture between the two with no direction to dry. It is a genuine mistake we still find in renovated walls, and it is invisible until the damage shows.

What a vapour barrier is not

It is not an air barrier by itself

Poly slows vapour diffusion. Sealed properly it also slows air, and unsealed it does very little of either. The sealing is what turns a sheet of plastic into a working assembly.

It is not a damp-proofing fix

If a Capilano basement has water coming through the wall, vapour control is not the answer and installing it will hide the evidence. That is a drainage and waterproofing problem, and we will say so rather than board over it.

How it works

Simple, clean, on schedule — Vapour Barrier Installation in Capilano Edmonton

Free quote

We come out to your Capilano Edmonton property, take a real look at the vapour barrier installation, and hand you a fixed price on the spot — no guessing, no vague ballpark. Every vapour barrier installation quote in Capilano Edmonton starts with an honest, on-site assessment.

Book a day

We pick a day that works for your schedule and show up on time, ready to start the vapour barrier installation in Capilano Edmonton. No back-and-forth rescheduling — once it's booked, our team is there.

The work

We keep the dust under control and protect your Capilano Edmonton home while we finish the vapour barrier installation to a clean, paint-ready standard. Floors covered, doors sealed off, and the site left tidy at the end of every day.

Walk it with you

We don't pack up till you've walked the finished vapour barrier installation with us and you're happy with the result in Capilano Edmonton. If anything needs a second look, we handle it before we call the job done.

Reviews

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★ ★ ★ ★ ★

Emplastrum Drywall is the vapour barrier installation contractor Capilano Edmonton trusts for repair, restoration and finishing — rated on Google by Edmonton homeowners.

Read the reviews, or leave your own after your vapour barrier installation project in Capilano Edmonton.

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FAQ — Vapour Barrier Installation Capilano Edmonton

Vapour Barrier Installation Capilano Edmonton: your questions answered

Will this pass inspection?: It is built to what the code asks for on your permit, and we leave it visible and sequence to your inspection date rather than boarding ahead. If an inspector raises something, we want the note directly so it is fixed from the actual reason.
Does it matter where the sheet meets the ceiling and floor?: It is the whole job. Left loose at the top or bottom plate, warm air simply goes over or under a perfectly installed sheet. The junction into a vaulted ceiling is the most commonly skipped and the wettest point in the room.
What if there is already a vapour barrier in the wall?: We tie into it, and we check whether there is a second one somewhere that would trap moisture between the two. Older Capilano renovations quite often have both, and finding that before boarding is worth the hour.
Is the vapour barrier the same as an air barrier?: Not by itself. Poly slows vapour diffusion; sealed properly it also slows air, and unsealed it does very little of either. The sealing is what turns a sheet of plastic into a working assembly.
Does it matter where the sheets overlap?: Yes. A lap must land on solid framing and be sealed with acoustical sealant compressed between layers. An unsupported lap taped across a cavity flexes with pressure changes and works loose.
Can you install the barrier if someone else did the insulation?: Yes, but we check the insulation first. A barrier over a poorly filled cavity locks the problem in, and once the board is on neither can be corrected without opening the wall.

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Estimate only — rounded up, based on standard coverage rates (drywall +10% waste; paint ~350 sq ft per gallon per coat; batt bundles by cavity depth, less a framing factor; studs at your chosen spacing plus waste). Product coverage varies by brand — confirm quantities before buying. Ask us about the right R-value for your project.

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Vapour Barrier Installation Capilano Edmonton

Poly and air sealing in Capilano before the board goes on