Does my basement development in Calgary 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 Calgary 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 Calgary?

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 Calgary 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 Calgary?

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 Royal Oak, Edgemont, Hawkwood and every Calgary quadrant.

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Vapour Barrier Calgary

Vapour Barrier Installation Calgary

Poly Vapour Barrier Calgary

Basement Vapour Barrier Calgary

Vapour barrier installation in Calgary — 6 mil poly sealed over insulation before drywall, lapped at the seams and sealed at every penetration.

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Vapour barrier installation in Calgary, 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 Calgary 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. Calgary is a city with everything from inner-city character homes to brand-new suburbs, so insulation calls here range from basement development in the newer homes to attic and wall upgrades in the older ones nearby. We cover all of Calgary, 7 days a week.

Vapour barrier installation in Calgary basements and renovations
6 mil poly on the warm side of the insulation in Calgary
Seams lapped over framing and sealed, not just stapled
Outlet boxes, vents and plumbing penetrations sealed in Calgary
Rim joist and window returns detailed properly
Left visible and ready for inspection before drywall
Calgary coverage — we come to you

What affects the cost of vapour barrier installation in Calgary?

Area, penetrations and detailing

Vapour barrier cost in Calgary 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 Calgary 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 Calgary the barrier goes on the warm side of the insulation — the side facing into the heated Calgary 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 Calgary wall that cannot be corrected without opening the wall back up, which is exactly why we check every Calgary job before anything is covered.

How we install and seal it in Calgary

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 Calgary 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.

Common vapour barrier situations in Calgary

New basement developments

insulation calls here range from basement development in the newer homes to attic and wall upgrades in the older ones nearby, so basement development is where most vapour barrier work comes up here — exterior walls and rim joist detailed before the drywall stage. See our basement drywall work if the boarding is part of the same job.

Renovations and open walls

When a wall in a Calgary home is already open, it is the only practical moment to add or repair a barrier.

Repairing a damaged barrier

We also repair poly that has been torn by other trades after it went up — a common find once electrical and plumbing have been through.

Why Calgary 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 Calgary.

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

How it works

Simple, clean, on schedule — Vapour Barrier Installation in Calgary

Free quote

Before anything is priced we walk the vapour barrier installation with you at the Calgary property. You get a fixed figure that day, not a range that moves later.

Book a day

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

The work

Floors get covered and doorways sealed before the vapour barrier installation begins. Your Calgary home stays liveable while we work, and the site is tidied each 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 Calgary.

Reviews

Rated by Calgary Homeowners

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For vapour barrier installation in Calgary, Emplastrum Drywall handles the repair, the restoration and the finish. What Calgary homeowners think of that work is on our Google profile.

Have a look through them before you decide — and leave one yourself once your Calgary job is done.

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FAQ — Vapour Barrier Calgary

Vapour Barrier Calgary: your questions answered

Does my basement development in Calgary 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 Calgary 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 Calgary?: 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 Calgary 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 Calgary?: 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 Royal Oak, Edgemont, Hawkwood and every Calgary quadrant.

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