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Those drafts spike your heating bill and carry moisture that can rot siding and framing. Insulation in this area seals the entire wall, stopping both the cold and the damp before they reach your home.
It also provides a thermal buffer, keeping temperatures steady during sudden weather changes. This reduces wear on heating and cooling equipment and minimizes outdoor noise.
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| Exterior Insulation Cedar Valley Insulation Material Type | Base Installed Cost Price | R-5 XPS Price | R-3.2 Insulation Price | R-3.7 Insulation Price |
|---|---|---|---|---|
| Exterior 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 |
| Open-Cell Spray Foam | CAD 1.50 – CAD 3.00 | CAD 1.50 – CAD 3.00 | CAD 1.50 – CAD 3.00 | CAD 1.50 – CAD 3.00 |
| Closed-Cell Spray Foam | CAD 3.50 – CAD 7.00 | CAD 3.50 – CAD 7.00 | CAD 3.50 – CAD 7.00 | CAD 3.50 – CAD 7.00 |
| Blown-In Cellulose or Fibreglass | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 | CAD 1.50 – CAD 2.50 |
| Rigid Foam (XPS/EPS) | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 | CAD 2.00 – CAD 4.00 |
Reduce Heat Loss
Drafts around your siding can make your home cold even when the furnace is on. Exterior insulation adds a layer outside your home’s walls, blocking drafts before they enter your living space.
This process involves attaching rigid foam or mineral wool panels to the outside of your home, then covering them with a weather-resistant barrier and siding. This keeps your walls drier and warmer, lowering heating needs and making your home more comfortable all year.
Cedar Valley has many older homes and rainy winters, which lead to heat loss through exterior walls. Even a small gap in the siding can let in cold, damp air that raises heating costs.
Homes in this area often sit on sloped lots that are exposed to wind and moisture. Our exterior insulation systems seal your home tightly, helping it stay warmer and drier without needing to run the furnace constantly.
Installation in Cedar Valley
In Cedar Valley’s damp winters, mineral wool insulation board is often used. Its fibrous structure resists water absorption and helps walls dry to the outside. Installers attach these rigid panels to the sheathing with long screws that have polymer washers. They then cover the panels with a water-resistant barrier and vertical strapping to create a rainscreen. At every opening, flexible flashing tape and pre-formed corners extend past the rough framing. This directs moisture outward and protects the insulation from getting wet.
Rigid foam boards like XPS are also used, but they need careful sealing at the seams. If not sealed properly, they can trap moisture. In Cedar Valley, where rain is common, mineral wool is often preferred to make moisture management easier. No matter the material, the system is installed in a shingle style from bottom to top. This way, each layer sheds water away from the wall below.
Exterior insulation moves the dew point outside the framed wall, which is important in Cedar Valley’s cool, rainy climate. By keeping the sheathing warmer, it reduces condensation from indoor humidity. A ventilated air gap behind the siding allows any rain that gets past the cladding to drain and dry. This prevents rot in the structural framing.
Long stainless-steel screws attach through the insulation into the studs. Their spacing is designed to handle wind loads without damaging the insulation. Overlapped seams and taped joints create a continuous air barrier, which helps reduce drafts at the wall. These details ensure that even on exposed sloped lots, the exterior insulation acts as a sealed, durable thermal layer.
Cedar Valley Permit Requirements
Maple Ridge’s Building Bylaw No. 8097-2026 requires a building permit for work regulated under the bylaw. This includes installing or changing exterior wall assemblies like rain screens, backing board for cladding, and insulation/vapour barriers. Exterior insulation retrofits that change the wall assembly or energy performance of a dwelling usually need this permit. They must be inspected, including specific checks for installing rain screens, backing boards for cultured stone or stucco, and insulation/vapour barriers before they are covered up. For permitted residential construction, building officials must inspect the building envelope before finishes are applied. Contractors installing exterior insulation and cladding must ensure that building wrap penetrations are properly sealed and flashed. They must also make sure that strapping for rain-screen cladding meets BC Building Code clause 9.27.2.2 requirements and that insulation/vapour barriers are installed correctly. An insulation inspection is needed after insulation and vapour barriers are installed but before interior finishing. This applies when exterior insulation affects the overall thermal envelope and inspection sequence. Maple Ridge’s Building Permits & Inspections requirements state that a building permit is required for structural changes and most exterior renovations to dwellings. Exterior insulation systems that change wall thickness, cladding support, or energy performance are treated as building work. This means they need a permit application, code compliance review, and mandatory inspections. Homeowners or contractors must apply through the Building Department and get permit approval before starting such exterior insulation projects.
