How To Fill Expansion Joints In Basement Floor

How to replace homasote homex 300 expansion joint filler in concrete.

How to fill expansion joints in basement floor.

Place strips of masking tape along the edges of the joint to prevent the sealer from overflowing onto the floor or wall. Filling concrete expansion joints with homex 300. Pour the self leveling polyurethane sealant into the joint above the backer rod filling it to the top. When they put in the concrete they put in what i m learning are called expansion joints in the floor right down the middle of it.

Expansion joints in concrete floors earth s surface moves and for concrete floors this is a problem. These joints need their fillers to be compressible so foam backer rods are fine but sand is not. Start at the end of the joint and pour along the entire length moving in a single direction. A backer rod in the joint also keeps the sealer plug thinner reducing the amount of sealant needed.

Prior to epoxy coating you can fill in the joints with polyurethane caulking. Unlike contraction joints it is not recommended to use silica sand as substitute fillers for expansion joints. For sealers use a bond breaker or backer rod in the bottom of the joint. Joints in slabs that will not be subjected to heavy hard wheeled traffic can safely be left unfilled or sealed with a flexible sealer.

This prevents the sealer from sagging into the joint and from adhering to the bottom of the joint which allows the sealant to stretch on both the top and the bottom. You can t lay a large concrete floor as a solid contiguous block of concrete because over time unsightly cracks will appear across the surface of the floor. How to fill contraction joints prior to applying epoxy coating. An example of an expansion joint is the gap between a driveway and garage floor.

Filling is done the full depth of the joint with a material that has enough compressive strength to support the edges of the joint from stresses imposed by heavy hard wheeled traffic.