Removing Seams In Concrete Block Walls

If you notice a white powdery film on your basement walls efflorescence is likely the culprit.

Removing seams in concrete block walls. Squeeze the caulk from your caulk gun so that the caulk fills the joint top to bottom and backer rod to the surface of the concrete block. Between mortar joints for cement block walls and around pipes where they enter or exit such as a water supply line or a sewer pipe. 2 apply the cleaning solution. You only need to grind 3 4 in.

How to seal a leaking concrete wall. This can diminish the appearance of your basement walls. However some walls gush water through openings in the concrete. Mix up new mortar.

Start at outside corners and work inward. To remove blocks you have to cut through the hardened mortar using saws designed for masonry work. Apply mortar to vertical joints. How to repair cinder block mortar joints.

To remove efflorescence from your concrete block walls you will need a few handy tools and ingredients. Safety goggles cold chisel hammer masonry caulk wire brush mortar mix. Fill the holes and cracks as deeply as you can then scrape the top over with a trowel so the concrete can patch the wall together evenly. Efflorescence typically shows up better on darker concrete and occurs when the salts and other materials in the concrete make their way to the surface.

1 trace the mortar joints surrounding the blocks you wish to remove using a marker. Start by grinding the top and bottom of the horizontal bed joints with an angle grinder photo 1. You will need a bucket filled with warm water liquid dish soap sponge clean cloth paint or bristle brush dry cloth protective goggles and a fan. You will need the following tools to start.

A high quality dehumidifier will help remove excess. Concrete walls sometimes only leak periodically such as after a hard rain or during snow melts. Or if the surface is indoors you can use a spray bottle filled with water to rinse the surface thoroughly. If the surface is outdoors you can use a hose to spray down the surface.

Clean the joints with water. Run the entire bead and then using your spray bottle filled with solvent or water depending upon the type of caulk you selected wet your finger and draw it down the joint to smooth and clean any excess. Apply concrete to any gaps in the blocks or mortar using a shovel.