The weather seal at the bottom of your garage door is the smallest, cheapest, most-ignored part of your door — and one of the highest ROI upgrades in the entire system. Here's why GTA homeowners should replace theirs immediately if it shows any wear.
What Weather Seals Actually Do
The rubber strip at the bottom of your door (the "astragal") does more than you think:
- Blocks cold drafts — Prevents heat loss into the garage
- Keeps water out — Rain, melting snow, and slush stay outside
- Stops pests — Mice, rats, and insects can't enter through gaps
- Prevents debris — Leaves, dust, and dirt stay outside
- Muffles road noise — Better acoustic sealing
- Compensates for uneven floors — Fills gaps in cracked or sloped garage floors
How to Tell Your Seal Is Failing
- Light visible under the door when closed
- Water pools on the garage floor after rain
- Cold drafts felt near the door
- Cracks, tears, or missing chunks in the rubber
- Rubber that's hardened and brittle instead of flexible
- Pest droppings inside the garage
- Leaves and debris accumulating just inside the door
Types of Weather Seals
1. Bottom Seal (Astragal)
The T-shaped or U-shaped rubber strip at the very bottom of the door. Replaced every 3-7 years.
Cost: $80-200 installed
2. Side Weatherstripping
Vertical strips along the vertical tracks. Often overlooked but critical for wind and pest control.
Cost: $60-150 installed
3. Top Weatherstripping
Horizontal strip at the top where the door meets the header.
Cost: $40-100 installed
4. Threshold Seal
Adhesive floor strip that mates with the door seal for extra weather protection. Especially useful in GTA winters.
Cost: $50-150 installed
DIY vs. Professional Installation
A bottom seal replacement is genuinely DIY-friendly:
- Buy the correct seal type (T-style or U-style) matching your door brand
- Remove old seal by pulling from one end (may need channel spray lubricant)
- Slide new seal into the retainer channel
- Cut to length and fit
But side and top seals are harder — the door often needs to be raised, brackets adjusted, and precise measurements taken. That's usually a pro job.
GTA Winter-Ready Seal Package
DPS Garage Doors offers a "winter seal package" — full replacement of bottom, sides, top, and threshold seal for $250-400 total. It's the single highest-ROI winter prep you can do for your garage door in GTA.