How To Fix A Sunken Sidewalk With Spray Foam

Summary by Krater

A homeowner demonstrates how to fix a sunken concrete sidewalk by drilling holes, using bottle jacks and C-clamps to lift the slab, and filling the void underneath with polyurethane spray foam before sealing the joints.

From the video

Answers: How do you raise and fix a sunken concrete sidewalk?

• concrete sidewalk lifting
• bottle jack slab leveling
• concrete spray foam injection
• masonry drilling techniques
• concrete joint sealing

What it concludes

• Using bottle jacks and C-clamps allows you to raise a sunken concrete slab to the desired height before injecting spray foam underneath.
• Spraying polyurethane foam into the holes beneath the lifted slab fills the cavity and pushes out the sides, confirming a secure foundation.
• Allowing the foam to cure for at least 8 hours ensures it is fully set before removing the lifting structure.
• Sealing the sidewalk joints and drilled holes after leveling protects the repair and ensures it will last for years.