Patio Door Weatherstrip Replacement Montreal Stop Drafts
Feeling a draft near your patio door? Water seeping in at the bottom or seals hardened and cracked? Replacing weatherstrips and seals is the fastest and most economical solution to restore thermal comfort and reduce your heating bills.
Is your patio door letting air in? Watch for these signs:
Cold air drafts
A flow of cold air passes between the door and frame? The seals are hardened, shrunk, or missing.
Water infiltration
Water enters under the door or along the sides during rain? The threshold or weatherstrips are defective.
Cold zone near the door
Temperature drops significantly near the door? Thermal insulation is compromised by worn seals.
Amplified outside noise
You hear traffic as if the door were open? The acoustic seals are degraded and let sound through.
Why do weatherstrips degrade?
Weatherstrips and seals are made of rubber, silicone, or soft PVC. Exposed to UV, extreme Montreal temperatures (-30°C to +35°C), and humidity, these materials harden, crack, and lose elasticity within 5 to 8 years. Once rigidified, they no longer press against the frame and let air, water, and noise through.
A defective seal is not just a comfort issue. It can cause water damage to flooring, mold on the jamb, and heating overconsumption of 15-25% during the Montreal winter. Weatherstrip replacement costs $100-250, while a year of overheating can cost much more.
Our solution: complete seal & weatherstrip replacement
We replace all seals on your patio door: the top weatherstrip, side seals, bottom threshold with its brush or drop-down seal, and inter-panel seals for double doors. We use commercial-grade seals, UV and low-temperature resistant, with a 5-year guarantee.
Service takes 45-75 minutes depending on door configuration. We remove old seals, clean the grooves, apply professional adhesive, and install the new weatherstrips. Air-tightness test included. Immediate result: no more drafts, water infiltration, or outside noise.
Technicians Specialized in Your Patio Door Type
Every technician on our team is specifically trained on patio door and sliding door systems. We are not general contractors — we do one thing, and we do it better than anyone in Montreal.
Our parts stock covers the main brands installed in Quebec: Novatech, Gentek, Ostaco, Alumipro, and many more. This means in most cases, we repair your door in a single visit without having to order parts.
A 1-Year Warranty on All Our Services
We have enough confidence in our work to offer a full 1-year warranty on all replaced parts and labor. If the same problem reappears within 12 months, we come back free of charge.
This warranty covers rollers, thermos units, locks, handles, weatherstrips, and screens. Your peace of mind is included in the price — no hidden fees, no fine print.
Price Range
Average price in Montreal
$100 – $250
Price depends on door configuration (single, double, triple) and seal type needed (standard, brush, high-performance silicone). Precise quote after inspection.
What Our Clients Say
"We had terrible drafts under the patio door. The weatherstrip replacement solved everything. My wife even noticed the living room was warmer without touching the thermostat."
"Water was seeping under the door every time it rained. The new seals stopped infiltration completely. Quick and clean service."
"I had the weatherstrips and thermos replaced at the same time. Spectacular result: no more drafts, no more condensation, and a lower heating bill. Thank you!"
FAQ — Patio Door Weatherstrip Replacement Montreal
How long does weatherstrip replacement take?
Single door: 45 minutes. Double or triple door: 60-75 minutes. This includes removing old seals, cleaning grooves, installing new ones, and the airtightness test.
Can I just add silicone over the old seals?
No, this is a temporary and ineffective fix. Old seals must be completely removed so new ones adhere properly and ensure optimal sealing. Tube silicone is for bathtub joints, not sliding doors.
What heating savings can I expect?
Our clients report a 15-25% reduction in heating consumption in the patio door zone after weatherstrip replacement. For an average Montreal home, that means $200-400 saved per winter.