Foundation Cracks

Sealing your cracks is essential to prevent water infiltration and the weakening of your foundations.

For foundation crack sealing by a contractor from Saint-Jean-sur-Richelieu serving Chambly, La Prairie, and the surrounding cities, call CONSTRUCTION APC. Our company, founded in 2018, is registered with the Régie du bâtiment (general contractor's license) and is a member of the APCHQ.

Our experts in foundation crack sealing have over 10 years of experience in waterproofing residential and commercial foundations. Call us without delay to seal your cracks, whether they are small or large!

We offer a transferable 10-year warranty on exterior crack repair and a 5-year warranty if sealing is done only on the interior walls.

Passive foundation cracks, which do not enlarge after a year or two, are usually small. Active cracks, which grow year after year, weaken and undermine the foundation concrete.

If cracks are sealed quickly, your concrete will be watertight again. Cracks in the foundations of houses and cottages are sealed with polyurethane foam that hardens inside the crack, while cracks in the foundations of large residential or commercial buildings are sealed with epoxy gel. Waterproofing membranes can also be applied by our team on the walls (up to the foundation footing) to prevent the appearance of other cracks.

Cross or star-shaped foundation cracks are often due to soil containing pyrite (a mineral that causes the soil to swell and houses to move). It is then recommended to perform a soil test in a laboratory, especially if you have noticed that your floors seem raised in places and your doors do not close properly. Our team can then remove the contaminated rocks and soil and replace them with crushed stone (after breaking the concrete slab). We will then pour a new slab.