Basement and Crawlspace Insulation in the Lower Mainland, BC
Western Insulation insulates basement walls, crawlspace walls and rim joists in homes across Langley, Metro Vancouver and the Fraser Valley. We use closed-cell spray foam, rigid foam board or batts depending on moisture and access, add a vapour barrier where needed, and prepare paperwork for rebates of up to $1,200 per area.
Warmer Floors Start Below Them
Cold floors, musty smells and drafts upstairs often come from an uninsulated crawlspace or basement. In the Lower Mainland’s wet winters, the fix has two parts: control the moisture, then insulate the walls and rim joists.
Warmer main-floor rooms
Drier crawl spaces
Rim joists sealed and insulated
What Basement and Crawlspace Insulation Fixes
Cold floors
Insulated foundation walls and rim joists stop cold air chilling the floor framing.
Damp and musty air
A sealed crawl space vapour barrier keeps ground moisture out; insulation keeps surfaces above the dew point.
Frozen pipe risk
Pipes and ducts in an insulated crawlspace stay on the warm side during cold snaps.
Comfortable finished basements
Suites, rec rooms and offices that are warm enough to use all year.
Insulate Crawlspace Walls or the Floor Above?
Insulate the walls (recommended for most) | Insulate the floor above | |
How it works | Crawlspace becomes part of the warm side of the house | Crawlspace stays cold and vented |
Pipes and ducts | Stay warm | Exposed to cold – need their own insulation |
Moisture | Paired with a sealed vapour barrier | Batts can sag and hold moisture in damp spaces |
Best for | Most Lower Mainland crawlspaces | Dry, well-vented spaces with no mechanicals |
Materials We Use Below Grade
We utilize industry-leading insulation products that deliver optimal protection for homes throughout the Lower Mainland, Metro Vancouver & Fraser Valley regions.
Insulation Options
Closed-cell spray foam
Spray foam bonds to concrete, seals rim joists and resists moisture – our first choice for damp crawlspaces.
Rigid foam board
Rigid foam insulation on basement and crawlspace walls, with sealed joints.
Batts in framed walls
Batt insulation for finished basements once moisture is under control.
Vapour barriers and ground cover
10 mil or heavier polyethylene over crawlspace soil, run up the walls and sealed.
Why Homeowners Choose Western Insulation for Basement and Crawlspace Insulation
Established 1998 and based in Langley Township – local crews who know Lower Mainland homes
In-house installation crews
Rebate-ready invoices showing area, R-value before and after, and insulation type
What Our Customers Say
Basement and Crawlspace Rebates (HPCN Contractor Required)
Take advantage of substantial incentives through BC Hydro and FortisBC energy efficiency programs. Our team streamlines the application process to maximize your eligible savings.
Current BC Rebates Include
Basement and crawlspace walls: $0.09 × R-value added × sq ft, up to $1,200 (keep – this one is correct)
Example: 600 sq ft of crawlspace wall insulated to R-12 = 12 × 600 × $0.09 = $648
Bonus of up to $2,000 for completing more than one upgrade
A vapour barrier on its own isn’t rebated – the insulation is. Details on our rebates page.
Related Services
Lower-level projects often combine rigid foam insulation, spray foam insulation and whole-home insulation upgrades, to keep the whole home warm from the ground up.
Basement and Crawlspace Insulation Across Langley, Metro Vancouver and the Fraser Valley
Our crews are based in Langley Township and do most basement and crawlspace insulation work in Langley, Surrey, White Rock, Aldergrove, Abbotsford and Maple Ridge, with regular projects across the rest of Metro Vancouver and the Fraser Valley.
Reviews and Accreditation
Book a Crawlspace or Basement Assessment
We’ll check moisture, access and what’s there now, then quote insulation and vapour barrier together.
Frequently Asked Questions
Should I insulate my crawlspace walls or the floor above?
In most Lower Mainland homes, insulating the crawlspace walls and rim joists works better than insulating the floor above. It keeps pipes and ducts on the warm side and pairs well with a sealed vapour barrier. Insulating the floor suits only dry, well-vented crawlspaces with no plumbing or ductwork.
Do I need a vapour barrier in my crawlspace?
Yes, almost every crawlspace with a dirt floor needs one. A sealed polyethylene vapour barrier, usually 10 mil or thicker, stops ground moisture rising into the space. In the Lower Mainland’s wet winters it protects floor framing and insulation from mould and rot and helps keep floors warmer.
What R-value should basement walls have?
For finished basement walls we typically install around R-20 (nominal) in a 2×6 wall or a combination of rigid foam and batts, and R-10 to R-15 of foam on crawlspace walls. Code minimums differ for new construction and major renovations, so check requirements with your municipality before you build.
Does basement and crawlspace insulation qualify for rebates?
Yes. When an HPCN contractor does the work, basement and crawlspace wall insulation earns $0.09 × R-value added × sq ft from the BC Hydro and FortisBC Home Renovation Rebate, up to $1,200. It can combine with attic or wall upgrades for bonuses of up to $2,000.
Can insulation help with radon?
Air sealing the crawlspace and basement can reduce how much soil gas enters, but insulation is not a radon fix. The only way to know your level is a radon test, and high readings need a certified radon mitigation professional.
How long does crawlspace insulation take?
Most crawlspace or basement insulation jobs take one to two days. Removing old insulation or debris, installing a new vapour barrier, or very tight, low access can add time. We give you the timeline with your written quote, and you can stay home while we work.
