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Once boards cup and separate, water finds a path behind them. That trapped moisture feeds rot and mold underneath. Installing new siding in Thornhill only pays off if those weak points are fixed at the same time.
Consider curb appeal as well. Homes in this area sit close to the street, so a clean, uniform exterior enhances the entire property. The right lap profile and finish can mimic real wood without the yearly scraping and painting.
We’re eager to chat! Drop us a line for all your exterior needs.
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| LP SmartSide Siding Thornhill Profile | Primed LP SmartSide Price | Prefinished LP SmartSide Price | Diamond Kote SmartSide Price | Painted LP SmartSide Price |
|---|---|---|---|---|
| Standard LP SmartSide Siding | CAD 3,500 – CAD 4,500 | CAD 5,500 – CAD 7,000 | CAD 6,000 – CAD 7,500 | CAD 4,500 – CAD 9,000 |
| Engineered Wood Siding Profile | CAD 3,500 – CAD 4,500 | CAD 5,500 – CAD 7,000 | CAD 6,000 – CAD 7,500 | CAD 4,500 – CAD 9,000 |
| 38 Series Lap Siding | CAD 3,500 – CAD 4,500 | CAD 5,500 – CAD 7,000 | CAD 6,000 – CAD 7,500 | CAD 4,500 – CAD 9,000 |
| 76 Series Panel Siding | CAD 3,500 – CAD 4,500 | CAD 5,500 – CAD 7,000 | CAD 6,000 – CAD 7,500 | CAD 4,500 – CAD 9,000 |
| Cedar Texture Shake Panel | CAD 3,500 – CAD 4,500 | CAD 5,500 – CAD 7,000 | CAD 6,000 – CAD 7,500 | CAD 4,500 – CAD 9,000 |
Moisture-resistant siding
Siding in our coastal climate faces constant rain, wind, and dampness that quickly damages ordinary materials. LP SmartSide siding uses a special treated wood strand process to resist moisture, rot, and impact better than standard fiber cement or vinyl.
Every board has a factory-applied wax coating on all four edges and a strong overlay that keeps out water. This means no swelling at the seams, no fungal growth from the bottom edge, and a paint finish that lasts years longer than site-painted options. We install LP SmartSide siding for Vancouver homes with careful attention to detail to keep warranties intact.
Thornhill is on the north slope of the Fraser River, where autumn storms and winter rains push moisture deep into exterior walls. Many homes here were built during Maple Ridge’s growth periods and still have their original siding, which wasn’t made for this level of wet weather.
The mix of older ranch-style homes, split-levels, and newer builds throughout Thornhill all face the same issues with moss, mildew, and paint damage on their exteriors. LP SmartSide’s treated material handles that moisture without warping, keeping your home’s outer layer straight and sound through every rainy season.
Moisture management in Thornhill
In Thornhill’s coastal climate, installing LP SmartSide starts with a ventilated rainscreen gap behind the siding. This usually involves vertical furring strips over a weather-resistant barrier. This air space helps moisture behind the boards dry quickly instead of staying against the wall sheathing.
Each engineered wood strand board has a factory-applied zinc borate treatment. This overlay keeps out moisture, and the boards also have a four-edge wax coating. During installation, the cut ends are sealed with touch-up paint. The boards are face-nailed with hot-dipped galvanized or stainless steel fasteners to resist corrosion from dampness. A 1/8-inch gap at butt joints prevents swelling and buckling.
For Thornhill’s varied architectural styles—from split-levels to newer builds—installers carefully pay attention to flashing at window heads and trim junctions. They use drip caps that extend beyond the siding face. This design prevents water from wicking behind the planks and streaking the paint surface.
A well-designed wall assembly in this wet area places LP SmartSide as the outermost layer of a drainage plane. The rainscreen cavity behind it acts as a capillary break. This setup stops direct contact between the back of the siding and the building paper, which could hold moisture and cause rot in the framing.
The wall’s water management depends on a shingle-style overlap of the cladding and integrated flashing. Window and door openings are sealed with flexible, self-adhered flashing tapes that extend past the nailing flanges. This directs any water that gets through the siding joints down and out the weep screeds at the bottom of the wall.
Fastening schedules are important. Nails are driven through the thick part of the siding into the studs, not just the sheathing. This helps resist wind uplift common in the Fraser Valley. This pattern, along with the wood-strand core’s ability to hold fasteners well, keeps the exterior stable through seasonal wetting and drying cycles without nail pops or board movement.
Siding permit requirements in Maple Ridge
Maple Ridge’s Noise Control Bylaw No. 5122-1994 sets the hours for siding work in Thornhill. Noisy work like cutting LP SmartSide panels, running compressors, or removing existing cladding is allowed Monday through Saturday from 7:00 a.m. to 9:00 p.m. only. It is not allowed on Sundays or statutory holidays unless a specific exemption permit is obtained from Maple Ridge’s bylaw department.
Maple Ridge’s Building Bylaw No. 6925-2012 requires a building permit for regulated construction, alteration, reconstruction, and repair work. For a home in Thornhill, LP SmartSide siding usually needs a permit if the project involves structural changes, affects building envelope performance, or goes beyond a simple like-for-like cladding replacement. That work must comply with the BC Building Code as managed by Maple Ridge.
The City of Maple Ridge states that any exterior changes to existing commercial, industrial, or multi-residential buildings require a building permit. While typical single-family residential siding replacement may not always need a permit if it is strictly like-for-like cladding replacement, LP SmartSide work on non-residential or multi-residential buildings in Thornhill is treated as an exterior renovation and generally requires a building permit with submitted plans and inspections.
A local school in Thornhill had aging siding that let moisture into several classroom wings. We solved this problem by installing LP SmartSide siding one building at a time. We worked closely with their staff to avoid disruptions. Now, the campus is tight and low-maintenance. Teachers no longer worry about damp spots affecting their classrooms.
Supporting Thornhill's economy
LP SmartSide siding in Thornhill is part of our regular work. The trip from Vancouver is easy; we take Water Street to Highway 1, cross the Port Mann Bridge, and arrive in the neighbourhood in about 55 to 70 minutes. Since we are local, we support Thornhill’s economy by buying materials from suppliers like Inland Industrial Supply Ltd. This way, your project gets quality products and helps local businesses grow.
In Thornhill, homes often have siding that warps and peels after rainy seasons. We install LP SmartSide siding, which resists moisture damage. The engineered wood strands come with a factory wax coating and zinc borate treatment. We also add a ventilated rainscreen gap behind the boards to help the walls dry. Thornhill’s wet climate along the Fraser River slope can cause moss and mildew, but this siding stays straight without swelling. Noisy work is allowed Monday to Saturday from 7 a.m. to 9 p.m., and a building permit may be needed for non-like-for-like replacements. Estimated costs range from CAD 3,500 to 4,500 for primed siding and CAD 5,500 to 7,000 for prefinished siding, and we can easily reach Thornhill from Vancouver.
Find answers to common questions about our services, process, and craftsmanship.