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When a home loses warmth through the exterior, colder wall surfaces create a hidden problem behind the siding. Condensation forms in the wall cavity as warm indoor air meets the chilled outer shell, trapping moisture and accelerating decay.
Homeowners often overlook another benefit. The exterior insulation that protects against moisture damage in winter also shields the structure from summer heat. This leads to a quieter interior and a more comfortable home throughout the year.
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| Exterior Insulation Deer Lake Insulation Material Type | R-5 Exterior Insulation Price | R-40 Exterior Insulation Price | R-20 Exterior Insulation Price |
|---|---|---|---|
| Rigid Foam Board Insulation | CAD 2 – CAD 4 | CAD 7 – CAD 14 | CAD 4 – CAD 8 |
| Fiberglass Batt Insulation | CAD 1 – CAD 2 | CAD 3 – CAD 6 | CAD 2 – CAD 5 |
| Loose Fill Cellulose Insulation | CAD 1 – CAD 2 | CAD 3 – CAD 6 | CAD 2 – CAD 4 |
| Spray Foam Insulation | CAD 3 – CAD 6 | CAD 10 – CAD 18 | CAD 5 – CAD 10 |
| Rolled Blanket Insulation | CAD 1 – CAD 2 | CAD 3 – CAD 6 | CAD 2 – CAD 5 |
Prevent Heat Loss
Cold siding means your walls are losing heat. Exterior insulation wraps your home in a thermal blanket. It stops drafts before they reach your living space.
We attach rigid foam panels to the wall sheathing and seal every seam. This creates a barrier that keeps indoor heat inside and warms your siding.
Homes near Deer Lake deal with wet rain in the colder months. That moisture pushes heat out of uninsulated walls, making a good exterior wrap essential here.
Many mid-century and newer homes have framed walls with empty spaces waiting to be filled. Adding insulation outside protects the structure from thermal shock and helps siding handle our wet climate.
Installation Techniques
We start by attaching rigid foam insulation boards to the wall sheathing using mechanical fasteners and large washers. For the damp climate in Deer Lake, we usually choose extruded polystyrene (XPS) because it resists water better than expanded polystyrene or polyisocyanurate. The boards are installed in a staggered pattern to reduce vertical seams that could allow moisture to enter.
After placing the foam, we seal every joint and fastener hole with compatible tape or sealant. Then, we attach vertical furring strips over the insulation to create a drainage plane behind the siding. This air gap helps any wind-driven rain that gets past the cladding to drain and dry, which is important for homes in Deer Lake where wet conditions are common.
Standard framed walls lose heat through the studs, which can create cold spots that cause moisture to condense inside the wall. By installing continuous exterior insulation, we move the dew point outward, keeping the sheathing warm and dry during Deer Lake’s damp winters. This helps prevent rot and mold that can form when warm air from inside meets a cold wall surface.
The assembly includes a water-resistive barrier behind the foam to protect the sheathing from any water that gets through the cladding. The furring strips create a ventilated air gap that allows the back of the siding to dry quickly after rain. This design reduces the impact of wind-driven rain and ensures that the wall can drain and dry to the outside, which is essential in a climate where exterior surfaces often get wet.
Deer Lake permit requirements
For a home in Deer Lake, exterior insulation that involves construction, exterior additions, or significant renovations to exterior walls generally requires a building permit from the City of Burnaby. Only minor, non-structural repairs to the outside, similar to simple painting or minor touch-ups, are exempt. Exterior insulation work is treated as construction, so it must follow Burnaby’s noise bylaw. Construction-related work can only occur Monday to Friday from 7:00 to 20:00 and Saturday from 9:00 to 20:00. No work is allowed on Sundays or statutory holidays. Continuous construction noise must stay at or below 85 dBA when measured at least 15.2 m from the source in residential areas. Where exterior insulation is part of a permitted renovation to a Deer Lake single- or two-family home, Burnaby’s building permit process includes an inspection after installation of insulation and vapour barrier. For permits applied for after September 1, 2019, a mid-construction blower door test is required before the insulation inspection, and the airtightness result must be within 1.5 ACH of the assumed design value.
