Vapour Barrier Installation Kiniski Gardens Edmonton

Vapour barrier in Kiniski Gardens, sealed as a continuous plane

A vapour barrier only works as a continuous plane. In Kiniski Gardens the failures are almost never the sheet itself — they are the electrical boxes, the top and bottom plates, the window returns and the penetrations, where the poly is cut and not resealed.

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

Vapour Barrier Installation Kiniski Gardens Edmonton

The parts an inspector looks at first

Kiniski Gardens drywall in context

Never two barriers

Laps, and the framing member behind them

Why the warm side, and why only one

Basement walls, where the rules change

Warm side, always

Simple, clean, on schedule — Vapour Barrier Installation in Kiniski Gardens Edmonton

Vapour Barrier Installation Kiniski Gardens Edmonton: your questions answered

Do the electrical boxes really need sealing?

They are the most common failure point. Every outlet in an exterior wall is a cut in the plane, and unsealed it is a direct path for moist air into the cavity at the coldest part of the wall.

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.

Is a basement wall done the same way as an upstairs wall?

No. A basement wall can take moisture from the ground too, so poly detailed like an above-grade wall can trap moisture against the concrete. The insulation is held off the concrete so the wall can dry, with vapour control on the warm side.

Why is there staining around my window reveals?

Usually the vapour barrier return at the window was torn or tucked rather than sealed. It is a cold junction, so condensation shows there first — often as staining or mould at the reveal.

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 Kiniski Gardens renovations quite often have both, and finding that before boarding is worth the hour.

What about outlets on exterior walls?

Each one is a deliberate hole. They need poly hats or airtight boxes sealed to the sheet. Taping poly to the front of an ordinary box does not last once board is fastened over it, and it is the most common leak we find.