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Warm air escapes through walls, forcing your furnace to run non-stop and driving up energy bills. Many homeowners face this issue when their building’s outer shell lacks a proper thermal break. It turns a chilly evening into an expensive battle just to stay comfortable.
A solid thermal barrier also blocks summer heat, keeping your space cooler as temperatures climb. It adds sound dampening against wind and street noise. For homes with aging siding, wrapping the exterior in insulation before new cladding means tackling energy loss and a much-needed refinish in one smart project.
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| Exterior Insulation Delta Insulation Material Type | Continuous Insulation Delta Price | Siding Replacement Delta Price | Site Access Delta Price | Finish Level Delta Price |
|---|---|---|---|---|
| Closed-Cell Spray Foam Insulation | CAD 3.00 – CAD 5.50 | CAD 3.00 – CAD 5.50 | CAD 3.00 – CAD 5.50 | CAD 3.00 – CAD 5.50 |
| Fibreglass Batt Insulation | CAD 0.80 – CAD 1.50 | CAD 0.80 – CAD 1.50 | CAD 0.80 – CAD 1.50 | CAD 0.80 – CAD 1.50 |
| Open-Cell Spray Foam Insulation | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 |
| Blown-In Cellulose Insulation | CAD 0.45 – CAD 0.65 | CAD 0.45 – CAD 0.65 | CAD 0.45 – CAD 0.65 | CAD 0.45 – CAD 0.65 |
| Rigid XPS EPS Insulation | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 |
Benefits of Exterior Insulation
Cold air coming through walls raises heating costs during winter. Exterior insulation creates a solid thermal barrier that keeps heat inside and cold outside.
We put rigid insulation boards over your home’s sheathing and cover them with new siding or cladding. This stops thermal bridging and seals air leaks, making your home warmer and more efficient—a proven method for exterior insulation in Vancouver.
In Delta, winter brings heavy rain and wind that can soak through exterior walls. Without proper insulation, moisture can get trapped, causing mold and rot behind your siding. Exterior insulation protects your walls, keeping them dry and warm even in bad weather.
Many older homes in Delta, especially those from the 1970s and 80s, have little wall insulation. Adding exterior insulation improves comfort and durability, fitting well with new siding. Our local team knows these issues and provides solutions designed for Delta.
Exterior Insulation in Delta
Installation starts with rigid foam boards, usually made of extruded polystyrene or mineral wool. These boards are fastened directly to the wall sheathing using long screws with washers. The screws go through the insulation and into the studs to hold the boards in place. The seams are taped with flashing tape to create a continuous air barrier.
Next, vertical wood or metal furring strips are added to create a 10 to 20 mm drainage gap. This rain-screen cavity allows moisture that gets behind the siding to drain and dry. This is important for Delta’s wet, windy winters. The furring strips also provide a solid base for the new siding.
At windows and doors, metal flashings are integrated with the insulation board to direct water outward. The exterior insulation wraps around corners and extends down to the foundation, reducing thermal bridges at rim joists and wall intersections.
Exterior insulation moves the dew point outward, keeping the wall sheathing above the condensation temperature. In Delta’s cool, damp winters, this helps prevent moisture from building up inside the wall cavity, which can cause rot. The continuous layer also stops thermal bridges at the studs, which can lead to heat loss.
The ventilated rain-screen cavity behind the cladding acts as a pressure-equalization chamber. Wind-driven rain that gets behind the siding drains down the back surface and evaporates, never reaching the insulation or sheathing. This design is important for Delta’s coastal exposure, where horizontal rain is common.
Proper flashing at penetrations and transitions directs water away from the building. The insulation boards also act as a secondary drainage plane, shedding water outward. Together, these layers create a strong system that meets local building codes for moisture and thermal performance.
Permit Requirements for Delta
In Delta, a building permit is needed for any work that adds to, alters, renovates, or repairs an existing building or structure. Installing exterior insulation as part of an exterior wall addition or structural change usually requires a building permit. However, simple non-structural replacement of cladding with added insulation may not need a permit, as long as it fits within the exempt “exterior finish repair or replacement” category.
For exterior additions to single detached homes in Delta, the City’s Residential Exterior Addition Building Permit guide requires cross-section drawings. These drawings must show insulation values, the location of the vapour barrier, and the finishes for the exterior walls.
Delta’s Noise Control Bylaw limits construction noise, including work with exterior insulation on houses, to 7:00 a.m.–7:00 p.m. Monday to Friday and 9:00 a.m.–5:00 p.m. on Saturday. No construction noise is allowed on Sundays or holidays unless the City gives special permission.
