Sealing Cracks In Concrete Roof

The crack or expansion joint must be cleaned of all debris.

Sealing cracks in concrete roof.

On heavy rain there was no problem but with a light. Set the rod 1 4 in. Cut the tip of the nozzle on an angle with a utility knife to match the width of the crack and load into a standard caulk gun. For large cracks over 1 2 inch deep a backer rod should be placed in the crack before applying the sealant.

Don t forget to replace roofing felt. How to seal cracks leaks in concrete roofs. Allow the vapor barrier to dry before you add a second coat. Caulking concrete cracks install backer rod.

Step 4 slowly draw the gun along the joint forcing a bead of concrete repair caulk deep into the crack. The crack was located on a tilted roof a complicated position that require special security. Fill and smooth the joint. Fill in large cracks with mortar or roofing cement then apply a good concrete primer.

Mix the epoxy paste according to package directions. Once the primer is dry apply an elastomeric sealant to the cracks corners and damaged areas and then to the entire roof. Follow up with a second coat after 24 hours have passed. Work systematically from one end to the other spraying in lines.

The fun in this problem was this. Some low volume epoxy sealants are supplied. The concrete needs to be dry. Pour your chosen vapor barrier into a paint sprayer after the primer is dry and liberally spray an even coat onto the concrete roof.

Overlap the previous line every time you start a new one. This is similar to regular caulk and is usually applied using a caulk gun. Crack repair in concrete roof step 1. Fill the crack with urethane caulk similar to what you would use for driveway caulk.

Lower than the surface of. Mix the epoxy sealant according to the manufacturer s directions. Clean the concrete by removing loose dirt or debris with a broom. Apply a small bead into the crack by pushing it.

The material goes on either with. Soak up any standing water from the area. It s latex based and. Use foam backer rod into the gap with your fingers.

Types of concrete crack fillers concrete crack sealant.