Summer storms can move in fast. Heavy rain, strong winds, and sudden downpours can put pressure on your home’s exterior. One of the first places water often finds a way in? Your windows.

A small crack in the caulking. Worn weatherstripping. A loose seal around the frame. These may seem minor, but during a storm, they can allow water to seep into walls, floors, and window frames.

The good news is that many window leaks can be prevented with simple maintenance. A few small checks now can help reduce the risk of water damage, mould growth, and costly repairs later.

Why Windows Leak During Summer Storms

Windows are built to protect your home, but over time, weather and regular wear can weaken the materials that keep water out.

Common causes of leaky windows include:

• Cracked or missing exterior caulking
• Worn or compressed weatherstripping
• Damaged window seals
• Gaps between the window frame and siding
• Poor drainage around the window
• Blocked weep holes
• Aging or shifting window frames

In many Canadian homes, winter freeze-thaw cycles can also loosen seals and create small openings. By the time summer storms arrive, those weak spots may be ready to leak.

Signs Your Windows May Be Letting Water In

Not every leak starts with water dripping onto the floor. Some warning signs are more subtle and may appear around trim, drywall, or flooring.

Watch for:

• Peeling paint or bubbling drywall near windows
• Soft or swollen wood trim
• Musty odours
• Condensation between panes of glass
• Water stains on walls or window sills
• Drafts around closed windows
• Visible cracks in caulking
• Damp carpet or flooring below windows

If you notice any of these signs, do not ignore them. Moisture can spread behind surfaces before the damage becomes visible.

Check Caulking, Weatherstripping, and Frames

Start outside. Look closely at the caulking around each window. If it is cracked, brittle, missing, or pulling away from the frame, it may need to be removed and replaced with an exterior-grade sealant.

Next, inspect the weatherstripping. This seals the moving parts of a window and helps keep out rain, drafts, insects, and outdoor air. If it is cracked, flattened, loose, or missing, it may no longer create a tight seal.

Do not forget the window frame. Wood frames can rot. Vinyl frames can warp. Older frames can shift over time. Look for soft spots, discolouration, cracks, loose trim, or gaps between the frame and wall.

If the frame feels soft or shows signs of rot, do not simply cover it with caulking. Moisture may already be trapped inside. A professional inspection can help determine whether repair or replacement is needed.

Keep Water Moving Away From Your Home

Your windows are only one part of your home’s water protection system. Gutters, downspouts, grading, rooflines, and window wells all help move rain away from your home.

Before heavy summer storms, check that:

• Gutters are clear of leaves and debris
• Downspouts direct water away from the foundation
• Soil slopes away from your home
• Window wells are clean and draining properly
• Exterior trim and siding are secure
• Roof runoff is not spilling directly over windows

Good drainage reduces pressure on window seals and helps protect your home from water damage and mould risk.

What To Do If Water Gets In

If water comes through a window during or after a storm, act quickly.

Move furniture, rugs, electronics, and valuables away from the area. Use towels or buckets to manage minor water entry, but do not assume the visible water is the only issue. Water may have moved behind walls, under flooring, or into insulation.

After the storm passes:

• Take photos of the damage
• Check nearby walls, floors, and trim
• Avoid disturbing areas with visible mould
• Contact your insurance provider if needed
• Call a professional restoration team if water has spread

Fast action can help reduce further damage and support a smoother restoration process.

Prevention Now Can Save Stress Later

Window maintenance is easy to overlook, but it can make a real difference before summer storms arrive.

Checking your caulking, weatherstripping, frames, and drainage can help reduce the risk of water damage, mould growth, damaged drywall, rotting trim, flooring damage, and higher repair costs.

Your home works hard to protect you. Regular maintenance helps protect it in return.

When You Need Help, Paul Davis Is Ready

Even with the best preparation, storms can still cause unexpected damage. If water enters your home, Paul Davis can help assess the situation and guide the restoration process with care.

Paul Davis teams across Canada provide support for water damage, storm damage, mould remediation, and emergency restoration. We respond with urgency, document the process thoroughly, and treat your home with respect.

Need help after a storm?

Find your local Paul Davis and get expert support today.