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Vapour barrier installation in Legacy, 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 Legacy 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. Legacy is one of SW Calgary's newer communities, where fresh installation and first-year settling work are common, so insulation calls here are usually limited to basement development, since the main floors are already insulated to current code. We cover Legacy, Pine Creek, Alpine Park, Osprey Hill and every Calgary quadrant, 7 days a week.

Vapour Barrier Legacy

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What affects the cost of vapour barrier installation in Legacy?

Area, penetrations and detailing

Vapour barrier cost in Legacy 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 Legacy 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. In Legacy basements the deciding detail is usually access: what has to stay reachable once the ceiling is closed up.

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

The warm side, always

In Legacy the barrier goes on the warm side of the insulation — the side facing into the heated Legacy 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 Legacy wall that cannot be corrected without opening the wall back up, which is exactly why we check every Legacy job before anything is covered. Knockdown is the standard ceiling texture through Legacy, so a patch gets tested for match before the whole ceiling is sprayed.

How we install and seal it in Legacy

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 Legacy 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. New homes in Legacy tend to have long unbroken wall runs and high ceilings, which changes how a seam has to be feathered.

Common vapour barrier situations in Legacy

In Legacy, legacy is a community still building out. Homes there are current-build, so ceilings are typically knockdown and the work is new-build boarding and taping, basement development, and the first-season movement that shows up as a house dries out. One fixed price after an honest on-site look, and the job done right the first time.

Why Legacy 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 Legacy.

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 Legacy and every Calgary quadrant, 7 days a week. Free on-site quotes and a fixed price before any work starts. Ceilings in Legacy are typically knockdown, and matching that pattern is the part of a repair people notice.

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

1

Free quote

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

2

Book a day

Scheduling is settled in one conversation. The vapour barrier installation start date in Legacy Calgary is confirmed and the team turns up on it.

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 Legacy Calgary home.

4

Walk it with you

You sign off, not us. We go through the completed vapour barrier installation with you at the Legacy Calgary home and fix anything that is not right that day.

Rated by Calgary Homeowners

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

Go through them, then judge us on your own Legacy Calgary project.

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What we tend to find in Legacy

In a newly built Legacy home the drywall has not yet been through a full winter, so we plan the vapour barrier installation around settling that is still happening rather than settling that has finished.

In Legacy we are often the second trade to look at a wall, so the first question is what the original finish actually was.

Knockdown is the standard ceiling texture through Legacy, which means the repair is judged on texture match as much as on whether the surface is flat.

Vapour Barrier Legacy: your questions answered

Does my basement development in Legacy 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 Legacy 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 Legacy?
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 Legacy 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 Legacy?
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 Pine Creek, Alpine Park, Osprey Hill and every Calgary quadrant.
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