Caulking around doors may seem simple, but small mistakes can lead to big problems like drafts, cracking sealant, and wasted energy. In Ontario’s changing weather—from freezing winters to humid summers—proper door and threshold caulking is essential for keeping your home comfortable and efficient. Here’s what to avoid when sealing your doors and how to get a lasting, professional result.
Using the Wrong Type of Caulk
One of the most common caulking mistakes around doors is choosing the wrong material. Not all sealants can handle Canada’s cold, wet conditions. Latex caulk may crack in freezing weather, while interior-only sealants won’t hold up against moisture.
- Use silicone caulk for exterior doors, as it’s flexible and waterproof.
- Look for products labeled “cold weather” or “all-season” for outdoor applications.
- Avoid painter’s caulk outdoors—it won’t last through freeze-thaw cycles.
Skipping Surface Preparation
Applying caulk over dirt, paint flakes, or old cracked sealant means it won’t stick properly. Before you begin:
- Remove all loose or old caulk using a scraper.
- Clean the area with mild detergent and dry it completely.
- Make sure the temperature is above freezing when applying the new caulk.
Applying Too Much or Too Little Caulk
Uneven gaps and excess caulk are easy mistakes. Too much creates a messy look; too little won’t seal properly. The goal is a smooth, even bead that fills the joint without spilling over.
- Use consistent pressure on the caulking gun.
- Smooth the bead immediately with a damp finger or a caulk tool.
- Fill larger gaps with backer rod before applying caulk for better adhesion.
Ignoring Door Thresholds and Frames
Many homeowners seal around the sides and top of doors but forget the threshold area—a key spot for air leaks. Caulking services often find that thresholds are the biggest source of drafts.
- Inspect under the door where the frame meets the sill.
- Apply caulk where wood meets metal or concrete.
- For exterior door sealing, make sure drainage paths are not blocked.
Not Allowing Proper Curing Time
Even the best sealant can fail if it doesn’t cure correctly.
- Avoid exposing fresh caulk to rain or freezing temperatures for at least 24 hours.
- Keep doors closed or minimize movement while the caulk sets.
- Follow product directions for curing times, especially during cold weather.
Caulking Over Cracked Sealant Without Repair
Simply adding new caulk over cracked or peeling sealant doesn’t fix the problem. Old caulk prevents the new bead from bonding and will lead to early failure. For proper repair:
- Remove all damaged caulk with a utility knife.
- Clean and dry the surface thoroughly.
- Apply new caulk in a continuous, even line.
Forgetting About Regular Maintenance
Even professional door caulking doesn’t last forever. Seasonal inspection is key.
- Check your door caulking every spring and fall.
- Replace caulk showing cracks, peeling, or gaps.
- Schedule a caulking repair service near you to handle yearly maintenance.
How Professionals Prevent These Mistakes
Experts use high-grade weatherproofing products and understand how temperature, humidity, and surface material affect adhesion. Professional door caulking ensures:
- Clean application and even seals.
- Durable protection against air leaks and water damage.
- Longer-lasting results that improve energy efficiency.
Need Help Sealing Your Doors?
If you notice drafts, cracking sealant, or uneven gaps, it’s time for professional attention. Kettle Contracting provides door threshold caulking services, cold weather caulking, and exterior door sealing throughout Oshawa, Ajax, Pickering, and Toronto. Protect your home, reduce heating costs, and restore comfort this season.
Call Kettle Contracting today to schedule your professional door caulking service and prevent air leaks around doors for good.
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