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Vapour barrier installation in Lanark, sealed before the board goes on

A vapour barrier is one of the few things in a build that is completely hidden and completely unforgiving — once the drywall is on, a torn sheet or an unsealed outlet box stays that way for the life of the wall. In Lanark we install and seal 6 mil poly over the insulation on the warm side, lapped at the seams and sealed at every penetration, before any board goes up. Lanark is an established Airdrie community where reno, repair and ceiling drywall are common, so basement development and the occasional upgrade where older insulation has settled or thinned are common here. We cover Lanark and all of Airdrie, 7 days a week.

Vapour Barrier Lanark

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What affects the cost of vapour barrier installation in Lanark?

Area, penetrations and detailing

Vapour barrier cost in Lanark depends on the wall and ceiling area being covered, the number of penetrations that need sealing — outlets, vents, pipes and light boxes — and how much detail work the rim joist and window returns need. We measure the space and give a fixed price before we start.

Usually priced with the insulation

Most Lanark vapour barrier work is quoted together with the insulation and the boarding that follows it, because it is the same crew and the same visit.

Which side the vapour barrier goes on, and why that is not optional

The warm side, always

In Lanark the barrier goes on the warm side of the insulation — the side facing into the heated Lanark room. That is what stops indoor moisture from travelling into the wall cavity and condensing when it reaches cold framing.

What goes wrong when it is reversed

A barrier installed on the cold side traps moisture inside the assembly instead of keeping it out. It is one of the few mistakes in a Lanark wall that cannot be corrected without opening the wall back up, which is exactly why we check every Lanark job before anything is covered. In Lanark we see everything from original finishes to recent renovations on the same block.

How we install and seal it in Lanark

Hung, lapped and sealed

We run the poly in the largest sheets the space allows to keep seams to a minimum, lap every seam over a stud or joist rather than in open cavity, and seal it — a stapled overlap on its own is not a seal.

The penetrations are the job

Outlet and switch boxes, bath fans, dryer vents, plumbing stacks and pot lights each get sealed individually in your Lanark home. Poly on the walls with open boxes behind it is not a working vapour barrier, and it is the single most common thing we find on jobs that were started by someone else. In Lanark we see everything from original finishes to recent renovations on the same block.

Common vapour barrier situations in Lanark

Homeowners across Lanark call us for drywall done right the first time. We patch, texture-match, prime and paint in one visit so the wall looks completely finished. We handle renovation and new-construction drywall, boarding and finishing on schedule. Book a free on-site quote seven days a week. One fixed price after an honest on-site look, and the job done right the first time.

Why Lanark homeowners have us do the vapour barrier

We are the ones boarding over it

As a drywall company we install the barrier the way we want to board over it, because we are the trade that has to live with what is behind the sheet in Lanark.

Left ready to be looked at

We leave the barrier complete and visible so it can be inspected before the drywall goes on — nothing gets covered until it has been seen.

Fixed price, same-day reply

We cover Lanark and all of Airdrie, 7 days a week. Free on-site quotes and a fixed price before any work starts.

Simple, clean, on schedule — Vapour Barrier Installation in Lanark Airdrie

1

Free quote

The quote happens at your Lanark Airdrie home, in front of the work. We measure, we look at what is behind the wall where it matters, and the price we give is the price.

2

Book a day

We book around you, not around our week. When the day comes the Lanark Airdrie crew is there at the agreed time, loaded for the vapour barrier installation.

3

The work

Dust control is set up first — sheeting, sealed openings, containment — then the vapour barrier installation is taken through to a paint-ready finish in your Lanark Airdrie home.

4

Walk it with you

The vapour barrier installation is not done when the tools are packed — it is done when you have walked it in Lanark Airdrie and told us it is right.

Rated by Airdrie Homeowners

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

Read what other people said, then tell us how we did on your own vapour barrier installation job in Lanark Airdrie.

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Vapour Barrier Lanark: your questions answered

Does my basement development in Lanark need a vapour barrier?
Almost always, yes — exterior basement walls in our climate need a barrier on the warm side of the insulation before drywall. We confirm what your specific assembly needs on the site visit rather than guessing from the plan.
Which side of the insulation does the poly go on in a Lanark home?
The warm side — the side facing into the heated room. It is the detail that gets reversed most often, and it is not correctable once the wall is boarded.
Do you seal the outlet boxes and vents in Lanark?
Yes — every outlet, switch box, vent and pipe penetration gets sealed individually. Poly hung over open boxes looks finished and does not work.
Do I still need a vapour barrier in Lanark if I have spray foam?
Sometimes not — some spray foam assemblies act as their own barrier, and adding poly over them can be the wrong call. It depends on the product and the thickness, so we confirm on site instead of assuming.
Can you do the vapour barrier and the drywall together in Lanark?
Yes — insulation, vapour barrier and boarding as one job is the most common way we do it, and it means one crew is responsible for what ends up behind the wall. We also cover Bayside, Kings Heights, Coopers Crossing and the Airdrie area.
Do you provide free quotes in Lanark?
Yes — we come out to your Lanark home, look at the work and give you a real, fixed on-site price. No guessing after.
Emplastrum Drywall — Vapour Barrier Lanark | Taping, Mudding, Ceilings & Painting

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