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Siding Replacement Thornhill

Reliable Siding Replacement In Thornhill

Wet winters leave your Thornhill siding swollen and cracked

Paragon Exteriors replaces your siding in Thornhill with tight, weather-sealed boards that resist winter rain
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Paragon

Moisture damage hides behind your siding

Swollen, cracked boards allow water to seep behind the cladding, where it rots the sheathing. By the time you see soft spots or peeling paint, the damage is often extensive. Addressing it early keeps the job manageable.

Siding replacement here enhances curb appeal and boosts resale value. Modern materials like fibre cement and insulated vinyl provide better thermal resistance than older options. This project offers multiple benefits for your home.

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Thornhill Siding Replacement Pricing Guide
This table outlines estimated costs for siding replacement projects in Thornhill based on various siding material types and exterior wall packages. Rows display the siding material options, while columns indicate whether the project includes an insulation package, a rainscreen package, or a combined system. Each intersecting cell provides the expected total price range in Canadian dollars for that specific installation scope.
Siding Replacement Costs in Thornhill
Siding Replacement Thornhill Siding Material TypeInsulation Package PriceRainscreen Package PriceCombined Insulation and Rainscreen Price
Vinyl SidingCAD 13,000 – CAD 28,000CAD 14,000 – CAD 30,000CAD 15,000 – CAD 32,000
Board and Batten SidingCAD 16,000 – CAD 34,000CAD 17,000 – CAD 36,000CAD 18,000 – CAD 38,000
Fiber Cement SidingCAD 18,000 – CAD 40,000CAD 19,000 – CAD 42,000CAD 21,000 – CAD 45,000
Engineered Wood SidingCAD 15,000 – CAD 32,000CAD 16,000 – CAD 34,000CAD 17,000 – CAD 36,000
Prices are estimates based on general market knowledge and reflect typical market ranges at the time of publication. Actual siding replacement quotes in Thornhill may vary depending on home dimensions, specific job conditions, material selection, and project timing.

Prevent Moisture Damage

When rain gets behind cracked siding, it rots the sheathing and invites mould. A full siding replacement is the only way to restore a dry, stable exterior. For siding replacement in Vancouver, we use the right materials and installation to keep moisture out for decades.

We remove every damaged board, check the wall beneath, and install a new layer of weather-resistant siding. With tight seams and optional rainscreen, your home stays dry even in heavy rain. This solution adds value and improves curb appeal.

Challenges of Thornhill's Weather

Thornhill gets a lot of rain from October through April. In Thornhill, that constant moisture is tough on siding, especially older wood or composite boards that weren’t installed with modern sealing methods.

Many homes here were built in the 1980s and 1990s, when builder-grade siding was common. Now, those materials need replacement. A properly installed new exterior protects your home from the weather.

Moisture-Resistant Siding

In Thornhill, we use siding products like fiber-cement, engineered polymer, and thick-gauge vinyl. These materials resist moisture absorption and swelling. We avoid traditional wood because it can rot in this damp climate. Our dimensionally stable boards have factory-finished coatings that resist warping from constant rain.

We start installation with a weather-resistant barrier over the sheathing. Then, we create a rainscreen gap using vertical strapping or a drainage mat. Siding boards are attached with corrosion-resistant nails and are lapped to direct water downward and away from the wall. J-channel and trims around windows and doors help to flash water out instead of letting it in.

Structural Performance for Homes

A siding system on a Thornhill home needs to act as a drained and ventilated rainscreen. The outer cladding deflects most rain, while a secondary drainage plane behind it captures any water that gets through. This cavity is vented at the top and bottom, allowing air to move, which speeds up drying and equalizes pressure. This reduces the suction that can pull water in during wind-driven storms.

Flashing details are important at horizontal trim boards, windows, and deck ledgers. Head flashings with drip edges direct water over the siding below. Base flashings at the bottom of walls guide moisture out through weep holes. Proper lapping of weather-resistant barrier layers ensures water drains down and out, never behind the barrier.

We also consider local wind exposure when attaching siding. Fasteners must go deep into the structural framing, not just the sheathing. Nails are placed at the top of each board’s nailing flange, so the head is covered by the next board. This protects it from moisture and improves the wall assembly’s resistance to high winds in the Fraser Valley.