Batt, Acoustic & Vapour Barrier Systems

Batt Insulation, Soundproofing & Vapour Barrier Installation in Airdrie

Batts and poly are the backbone of most insulated walls in Airdrie houses, and the difference between a warm, dry wall and a cold, damp one is almost always in how they are fitted and sealed. We install fibreglass and ROCKWOOL batts, acoustic assemblies and sealed 6-mil vapour barriers as one system.

A framed basement wall with pink batts in the lower bays and clear poly vapour barrier stapled over the finished section, its laps sealed over the studs.

How These Systems Differ

This group covers the layered assembly inside an open stud wall, ceiling or floor. Thermal batts fill the cavity and slow heat loss. Acoustic batts fill interior cavities to quiet the space between rooms. The vapour barrier, usually 6-mil polyethylene sealed with acoustical sealant, goes on the warm side of insulated exterior walls and ceilings to keep moist indoor air away from cold surfaces. Each layer depends on the others: a perfect batt behind torn poly still invites moisture, and perfect poly over a gappy batt still leaves a cold wall.

The thermal options are fibreglass and stone wool. Fibreglass batts, from R-14 in 2x4 walls to R-20, R-22 or R-24 in 2x6 walls and R-28 in deeper framing, are the economical way to insulate an open cavity. ROCKWOOL Comfortbatt does the same thermal job with a stiffer, water-repellent, noncombustible batt that holds its shape and cuts precisely. At the same labelled R-value, the two insulate equally; the choice comes down to fire behaviour, moisture tolerance, fit and budget.

ROCKWOOL Safe’n’Sound is different. It is an acoustic batt for interior walls, ceilings and floors, and it works best as one part of a sound-control assembly that also includes sealant, decoupling and heavier drywall. The sound rating comes from that assembly rather than from the batt alone. Vapour barrier installation ties the whole category together, because every insulated exterior wall and attic ceiling behind these batts needs continuous, sealed poly or an equivalent vapour control layer that a designer has approved.

Batts & Vapour Barrier Services

A pink fibreglass batt peeled open through its thickness, with a white electrical cable running inside the split instead of compressing the batt.

Fibreglass Thermal Batts

R-14 to R-28 friction-fit batts, cut tight for exterior stud walls.

How it works

Greenish-grey stone wool acoustic batts fill the cavities of an interior stud wall between two rooms before drywall.

ROCKWOOL Safe’n’Sound Acoustic Batts

Safe’n’Sound batts for quieter interior walls, ceilings and floors.

How it works

A gloved hand fits a dense, greenish-brown mineral wool batt into a 2x6 exterior wall bay; a serrated knife lies on the sill plate.

ROCKWOOL Comfortbatt Mineral Wool

Water-repellent, noncombustible stone wool batts for exterior walls.

How it works

Close view of an electrical box inside a clear plastic vapour hat, with the poly vapour barrier sealed to the hat's flange by a black sealant bead.

Code-Compliant Vapour Barriers

Continuous 6-mil poly with sealed laps, plates and electrical boxes.

How it works

Choosing Between Them

Exterior wall, lowest cost per R: Choose fibreglass thermal batts sized to the framing, installed without compression or gaps, with sealed poly on the warm side. Carefully fitted, they deliver the thermal value most walls need.
Exterior wall with fire or moisture concerns: Choose ROCKWOOL Comfortbatt where noncombustibility, water repellency or a batt that will not sag matters, such as near heat sources or in framed walls inside concrete. It still needs a vapour barrier.
Noise between rooms or floors: Choose Safe’n’Sound acoustic batts in interior partitions and joist bays, combined with acoustical sealant and, where budget allows, resilient channel or clips and heavier drywall. For a secondary suite, start with our suite sound isolation service.
Any insulated exterior wall or attic ceiling: Add a continuous sealed 6-mil poly vapour barrier unless the assembly already has an approved vapour control layer, such as thick closed-cell foam. Never double up without the designer’s sign-off.

Why It Matters Around Airdrie

Most of Airdrie’s housing was built from the 1990s onward, and a large share of the batt and poly work here happens when owners develop basements, renovate older homes in neighbourhoods such as Hillcrest, or open walls to add bathrooms and home offices. Those are permitted jobs in most cases, and the insulation and vapour barrier are part of the inspected work under a City of Airdrie or Rocky View County permit.

The climate is unforgiving of shortcuts. Cold snaps well below -30°C, strong prairie winds and chinooks that swing temperatures by 20°C or more in hours all expose gaps in insulation and holes in poly. Air leaking through an unsealed box or lap carries moisture to cold sheathing and rim joists, where it frosts and melts over and over. Fitting batts properly and sealing the vapour barrier completely is the most cost-effective defence against that cycle.

Batts & Vapour Barrier: Common Questions

Can you insulate and vapour barrier a basement that someone else framed?

Yes. Walls framed by a homeowner or another trade can be insulated and vapour barriered the same way. Before starting, we check that the framing is suited to the batts, that wiring and plumbing are roughed in, that the rim joists have a plan, and that there is room for proper sealant beads at the plates. If something needs correcting before insulation goes in, we point it out rather than covering it up.

In what order should batts, poly and drywall go in?

Framing first, then electrical and plumbing rough-in, then rim joist sealing, then batts, then the vapour barrier, then any resilient channel or clips, and drywall last. Where a permit applies, the authority having jurisdiction decides which stages are inspected, so the insulation and poly are left open until that is settled. Where an acoustic assembly uses channel or clips, the framing is marked so drywall screws do not short-circuit the decoupling.

Can one visit handle thermal batts, acoustic batts and poly together?

Usually, yes, and it is often the most sensible way to do a basement development. Exterior walls get thermal batts and sealed poly, interior partitions and ceilings get acoustic batts where you want quieter rooms, and rim joists get their own treatment. Doing it together means the layers are planned as one assembly, with the vapour barrier continuous where it needs to be and absent where it would do harm.

Other Insulation Services

Spray Foam

Attic & Blown-In

Removal & Air Sealing

Home Problem Solving

Commercial & Industrial

Talk to Us About Batts & Vapour Barrier

Tell us what the space is and what is going wrong. We will recommend the system that fits, including when a cheaper one will do.

(825) 475-1869 Send the Details