How To Seal Leaking Concrete Roof

Fill in large cracks with mortar or roofing cement then apply a good concrete primer.

How to seal leaking concrete roof.

Sealing leaks and waterproofing. Seam tape large cracks with epdmcoatings adhesive seam tape. Allow the vapor barrier to dry before you add a second coat. Mix the epoxy paste according to package directions.

I tried the paint on roof sealant type stuff but to be honest it never really worked. Repair large holes with concrete patch. Check the entire roof surface look out for ponding water and inspect the plumbing lines. How to seal cracks leaks in concrete roofs.

The whole concrete roof is cleaned and power washed then flood coated with epdmcoatings elastomeric pure acrylic primer. Some time it works for 30 years if you make the layer in slop and rain water never dump on it and it flows out from roof. Pour your chosen vapor barrier into a paint sprayer after the primer is dry and liberally spray an even coat onto the concrete roof. Great job easy to do and will last longer than i will.

The concrete needs to be dry. We usually in pakistan mix mud and wheat straw fodder the remainings of wheat after crushing. Apply a small bead into the crack by pushing it. It is also insulator keeping the roof cool from sun and control room temperature and dont allow water seeping or leakage but every 10 to 15 year you have to change it.

When repairing a leaking roof the fundamental issue is that it is the reinforced concrete that is leaking and the best approach is to remove the screed and expose the reinforced concrete so that leaks can be found and properly sealed. Follow up with a second coat after 24 hours have passed. I watched a few vids on you tube for how to do it and it was a doddle. Overlap the previous line every time you start a new one.

You may also visit the sides of your building drainage pipes etc. After mixing this in mud clay we put a layer of 3 to 5inches on concrete roof. Work systematically from one end to the other spraying in lines. Clean the concrete by removing loose dirt or debris with a broom.

The screeding can then be replaced. Once the primer is dry apply an elastomeric sealant to the cracks corners and damaged areas and then to the entire roof. The first step on how to stop water leakage from concrete roof is to find the source. Google rubber roofs and you will get loads of helpful sites.

In the end i re roofed it using rubber sheeting.