# Freeze-Thaw Damage: 7 Spots to Check on Your Home Every Spring > Canadian winters freeze and thaw your home dozens of times. Check these seven spots each spring, from the foundation to the fence, to catch damage early. - URL: https://www.bqhs.com/blog/home-maintenance/spring-freeze-thaw-damage-check - Topic: Home Maintenance - Published: 2026-09-22 - Updated: 2026-11-04 - Author: The BQHS Team, Baeumler Quality Home Services (BQHS) ## Quick answer After winter, check your foundation and basement, sump pump and drainage, eavestroughs and downspouts, roof edges and ceilings, deck and steps, fences and gates, and exterior caulking and siding for freeze-thaw damage. In most of Canada, winter isn't one long freeze. Temperatures swing above and below zero again and again, sometimes in the same day, and every swing puts your house through a small test. Water is what makes it damaging. Rain and melting snow seep into small cracks in concrete, gaps in caulking and the soil around your foundation. When the temperature drops, that water freezes and expands, pushing the crack a little wider or lifting whatever sits on top of it. When it thaws, more water flows into the space the ice made. Repeat that cycle through a whole winter, and a hairline crack can become a leak, and a level deck can end up with a step that rocks. Most of this damage is easy to miss because it happens slowly and out of sight. That's why spring, once the snow is gone and the ground has dried out a little, is the best time to walk around your home and look for it. These are the seven spots we check first. ## Practical Takeaways - Wait until the snow has melted and the ground has firmed up, usually April or May, before doing a full check. - Start with anything that affects water getting into your home: the foundation, sump pump, eavestroughs and roof edges. - Treat loose railings and uneven steps as a priority, since they're a safety issue. - Take photos of any cracks you find so you can compare them over the next few months. - Call a professional for foundation cracks that are wide, growing or letting in water. ## 1. Foundation walls and the basement Start inside, in the basement, where water from the spring melt shows up first. Home owners are recommended to checking your foundation walls every spring for cracks, leaks and moisture, and it's one of the most important things you can do after winter. Look along the walls and the floor where they meet. Signs to watch for include: - New cracks, or existing cracks that look wider than last year - Damp patches, water stains or tide lines on the concrete - White, chalky deposits on the wall, which are mineral salts left behind by water passing through - A musty smell or higher humidity than usual Then head outside and walk the perimeter. Look at the exposed part of the foundation for cracks and flaking concrete, and check that the ground slopes away from the house. Frost and settling can leave low spots right against the wall, and those collect water every time it rains. Hairline cracks that stay dry are common and usually cosmetic. A crack that's wider than a few millimetres, is getting bigger, has one side sitting higher than the other or lets in water needs a professional assessment. ## 2. Sump pump and drainage If your home has a sump pump, test it before the spring melt is in full swing. Lift the lid and slowly pour a bucket of water into the pit. The pump should switch on, empty the pit and shut off on its own. While you're there, check that the discharge pipe is connected and that it carries water well away from the house. A pipe that empties right beside the foundation sends the same water straight back to the pump, or into the basement. It's also worth checking any window wells. Leaves and debris collect in them over the winter, and a blocked well can fill up and leak through the basement window during a heavy rain. ![Technician reattaching a downspout to an eavestrough](https://whhcdpfddpbfzglzpays.supabase.co/storage/v1/object/public/public_media/blog/2026/spring-freeze-thaw-damage-check/spring-freeze-thaw-damage-check-2.webp) ## 3. Eavestroughs and downspouts Snow and ice are heavy, and eavestroughs take a lot of that weight all winter. In spring, it's common to find sections that are sagging, pulled away from the fascia or separated at the joints. Look for: - Sections that sag or tilt the wrong way, so water pools instead of draining - Loose or missing brackets - Leaking joints and corners - Downspouts that have come apart or been knocked loose by snow clearing - Leftover debris from the fall that's now soaked and packed down Every downspout should empty onto a splash pad or extension that moves water away from the foundation. If any have shifted over the winter, put them back before the spring rain arrives. If the damage is beyond a quick fix, it's worth folding it into your regular [exterior upkeep](https://www.bqhs.com/services/exterior-care/exterior-upkeep) before the next storm. ## 4. Roof edges and ceilings You don't need to climb onto your roof to spot freeze-thaw damage. From the ground, with a pair of binoculars if you have them, look along the roof edges for shingles that are lifted, cracked or missing, and for any damage to the flashing around chimneys and vents. Ice dams are the main concern here. When snow melts on a warm roof and refreezes at the cold edge, the ice can force water back under the shingles. The damage often shows up inside the house rather than on the roof, so check your top-floor ceilings and the tops of exterior walls for brown stains, bubbling paint or soft spots. If you find a stain, figure out where the water came from before fixing the ceiling. Once the roof or eavestrough issue is solved and the area has dried out, the stained section can be cut out or sealed and refinished as part of a normal [ceiling and drywall repair](https://www.bqhs.com/services/interior-care/ceiling-and-drywall). ## 5. Deck, porch and steps This is the spot where freeze-thaw damage is most likely to become a safety issue. When the ground freezes, it can push deck posts, footings and concrete steps upward, a process called frost heave. When it thaws, they don't always settle back where they started. The result is a deck that's no longer level, a step that rocks or a railing that's come loose from its post. Walk the deck and steps slowly and check: - Railings and handrails: push on them firmly. They shouldn't move. - Steps: look for any that rock, tilt or have pulled away from the deck. - Boards: watch for nails or screws that have lifted, and boards that are cracked, soft or loose. - Posts and footings: look underneath for posts that have shifted or footings that are sitting higher than they used to. - Concrete steps: check for cracks, chipped edges and any step that has separated from the house. Raised nails and loose boards are easy fixes. Loose railings and uneven steps should be dealt with right away, before anyone leans on them or trips. Re-levelling steps and securing railings are typical spring [deck and porch repairs](https://www.bqhs.com/services/exterior-care/deck-and-porch-maintenance), and they're much simpler to handle before the deck season starts. ## 6. Fences and gates Fences go through the same frost heave as decks. A post that was pushed up by frozen ground over the winter can leave a section of fence leaning, a run of boards out of line or a gate that won't latch anymore. Start with the gates, since that's usually where you'll notice it first. If a gate drags on the ground, won't close on its own or doesn't line up with the latch, the post it's hung on has probably moved. Then walk the length of the fence and look for posts that lean, sit higher than the others or wobble when you push on them, along with any boards or rails that have cracked or come loose. Wait until the wood has dried out before painting or staining, and fix the structure first. A post that has lifted or shifted is usually the real problem, and [fence and gate repairs](https://www.bqhs.com/services/exterior-care/fence-and-gate-repairs) that address the post will last longer than adjusting the gate hardware alone. ## 7. Caulking, siding and trim Finally, take a slow walk around the house and look at the outside walls. Caulking that was in good shape in the fall can crack or pull away after a winter of expanding and shrinking. - Check the caulking around windows, doors and anywhere pipes or vents come through the wall. - Look for siding that has cracked, warped or come loose, especially on the north side of the house. - Press gently on wooden trim and window sills. Soft or spongy wood means water has been getting in. - Look for small holes or gaps where birds, squirrels or other pests could get in. If you did the [fall jobs that prevent winter damage](https://www.bqhs.com/blog/home-maintenance/fall-home-maintenance-checklist-canada) last year, this check should be quick. Small gaps can be resealed once temperatures are reliably above freezing, while cracked siding and damaged boards are best handled as [exterior cosmetic repairs](https://www.bqhs.com/services/exterior-care/exterior-cosmetic-repairs) before summer heat and storms make them worse. ![Asphalt shingles and an eavestrough with leaves after winter](https://whhcdpfddpbfzglzpays.supabase.co/storage/v1/object/public/public_media/blog/2026/spring-freeze-thaw-damage-check/spring-freeze-thaw-damage-check-3.webp) ## When to call a professional Most of what you'll find on a spring walk-around is minor. A few things are worth getting help with sooner rather than later: - Foundation cracks that are wide, growing, uneven or leaking - Water in the basement after rain or snowmelt - Railings, steps or deck posts that have shifted noticeably - Water stains on ceilings that come back after you've cleaned them - Roof damage you can see from the ground For everything else, the key is to deal with it before next winter starts the cycle again. ## Make spring part of your routine A spring check pairs naturally with a fall one, and together they catch most problems before they get expensive. If you're not sure [how often your home needs a check-up](https://www.bqhs.com/blog/home-maintenance/how-often-home-check-up), twice a year is right for most Canadian homes. If you'd rather have someone walk through it with you, a [BQHS Home Health Check](https://www.bqhs.com/home-health-check) covers the exterior, decks, fences, railings, caulking and more. One of our technicians walks through your home room by room and outside, then gives you a plain-language report on what we found, what we fixed and what to keep an eye on. Disclaimer: This article is general information for homeowners. Do not climb onto your roof or work at height without the right equipment and training. For foundation, structural, roofing, electrical or plumbing concerns, contact a qualified, licensed professional. ## Frequently Asked Questions ### What is freeze-thaw damage? Freeze-thaw damage happens when water gets into cracks and gaps, freezes and expands, then thaws and lets more water in. Repeated over a winter, it widens cracks in concrete, loosens caulking and can lift decks, steps and fence posts. ### When should I check my house for winter damage? Once the snow has melted and the ground has firmed up, usually in April or May in most of Canada. Check the basement and sump pump earlier, as soon as the spring melt begins. ### Are foundation cracks after winter normal? Small, dry hairline cracks are common and usually cosmetic. Cracks that are wide, growing, uneven or letting in water should be looked at by a professional. ### What is frost heave? Frost heave is when frozen ground expands and pushes upward on things like deck posts, footings, concrete steps and fence posts. They don't always settle back into place when the ground thaws. ### Why won't my gate close after winter? The post the gate hangs on has probably shifted from frost heave. Adjusting the hinges may help for a while, but fixing or resetting the post is usually the lasting solution. ### How do I know if I had an ice dam? Look for brown stains, bubbling paint or soft spots on the ceilings and upper walls of your top floor, and check the eavestroughs for damage. Water from an ice dam often shows up inside the house before you notice anything on the roof.