Poly (Vapour Barrier)

What Is Poly (Vapour Barrier) and Why Is It Important?

Poly, or polyethylene, is a vapour barrier used alongside insulation to control moisture in walls, ceilings, and floors. It prevents condensation, mould, and structural damage while helping insulation maintain its full thermal performance. Poly is especially important in Saskatchewan’s climate, where temperature swings can create moisture problems. Installed correctly, it enhances energy efficiency and prolongs the life of your insulation.

Poly Insulation Inside Walls
Poly Insulation In Ceiling

What Are The Benefits of a Vapour Barrier?

    Blocks moisture to protect insulation and building materials.

    Prevents mould and mildew growth inside walls and ceilings.

    Maintains insulation’s full R-value by keeping it dry.

    Protects structural elements from water damage.

    Enhances energy efficiency by reducing air and moisture.

    Works with batt, blown-in, and spray foam insulation types.

    Required by building codes in many climate zones.

Where Should a Vapour Barrier Be Used?

● Exterior walls
● Ceilings, Attics
● Basements, Crawl spaces
● New construction buildingenvelopes
● Renovations and retrofits
● Agricultural buildings
● Commercial structures
● Shops and garages
● Cold storage rooms

Start Your Insulation Project Today

Our team is ready to provide reliable, professional insulation solutions for any property in Saskatoon, SK and surrounding areas. Contact Apex Insulation today for a free quote and expert guidance to make your space more comfortable and energy-efficient.