Is DIY garage door weatherstripping worth doing or should I pay someone to install it?

Garage door weatherstripping replacement is one of the most straightforward and rewarding DIY projects you can do, and paying someone to do it for you is almost never worth the cost. The materials are inexpensive, the installation requires basic tools, and the energy savings are noticeable — especially in Ottawa where the temperature difference between a January night at minus 25 and the inside of your garage can drive significant heat loss through worn-out seals.

The three types of weatherstripping on a garage door are the bottom seal (the rubber strip along the bottom edge of the door that contacts the floor), the side and top seals (rubber or vinyl strips mounted to the door frame that compress against the closed door), and the threshold seal (an optional rubber strip mounted to the garage floor that the door closes against). All three are available at Ottawa hardware stores and online, and all three are DIY-friendly.

The bottom seal is the most commonly replaced component because it takes the most abuse — dragging across concrete twice a day wears it out within three to five years. Replacement bottom seals come in T-style and U-style profiles that slide into the retainer channel on the bottom edge of the door. You pull out the old seal, clean the channel, lubricate it with silicone spray, and slide the new seal in from one end. Total time: 15 to 30 minutes. Cost: $15 to $40 for a two-car door seal.

Side and top seals (sometimes called door stop weatherstripping) mount to the door frame with nails or screws. You peel off the old strip, position the new one so it compresses evenly against the closed door, and fasten it in place. Some products are self-adhesive, though the nail-on type holds up much better through Ottawa's freeze-thaw cycles. Cost: $20 to $50 for a full perimeter kit. Time: 30 to 60 minutes.

A threshold seal is an upgrade rather than a replacement — many garages do not have one from the factory. It is a heavy rubber strip with a built-in channel that you adhere to the garage floor just inside the door opening using construction adhesive. When the door closes, the bottom seal compresses against the threshold seal, creating a double barrier against drafts, rain, snow, and leaves. This is particularly valuable in Ottawa where wind-driven snow can infiltrate even a well-sealed door through the gap where the floor meets the door. Cost: $30 to $60 for a two-car door. Installation time: 30 minutes plus adhesive cure time.

Total cost for all three types on a two-car garage: $65 to $150 and about two hours of work. A garage door company in Ottawa would charge $150 to $350 for the same service call, with most of that being the minimum service charge rather than the complexity of the work. The materials are identical — the company is using the same weatherstripping products you would buy at the store.

The one scenario where professional installation makes sense is if your garage door is significantly out of alignment — sagging on one side, not closing evenly, or leaving gaps that weatherstripping cannot compensate for. In that case, the real problem is the door balance, tracks, or hardware, and new weatherstripping is just masking the underlying issue. A garage door technician should diagnose and correct the alignment before you spend money on seals that will not work properly against an uneven door.

Ottawa's climate makes garage weatherstripping replacement one of the highest-return DIY maintenance tasks you can do. The materials pay for themselves within a single heating season through reduced heat loss. For door alignment or hardware issues that are beyond weatherstripping, connect with garage door professionals through Ottawa Garages.

---

Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Homeupgraders
• RenoMotion Inc.
• Garage doors unlimited
• Callandgone
• Epoxy Academy