You may also visit the sides of your building drainage pipes etc.
How to repair leak in concrete roof.
If several tiles must be replaced begin at one end and work your way across.
Cracked concrete roof deck is leaking are silicone and hydrolic cement needed do not use silicone use epoxy then a concrete overlay libbie a handy woman hailing from port alberni british columbia canada our northern ally emailed me with a great message.
Concrete cannot be the top layer of any roof.
Structural concrete roof concrete waterproof coat elastomeric polymer protective screed 12 5 mm thick brickbat coba in slope 75 125 mm finishing screed 20 25mm.
Identify the first tile to be removed and carefully lift the tile above it enough to allow you to slide the crowbar beneath it.
Fill in large cracks with mortar or roofing cement then apply a good concrete primer.
Before understand the repair procedure you need to understand the typical cross section of terrace waterproofing.
Read it for yourself.
Most likely you have just a concrete slab and not roof system with layers of insulation what you should do is to cover concrete with metal sheet for example.
The whole concrete roof is cleaned and power washed then flood coated with epdmcoatings elastomeric pure acrylic primer.
Ascend the ladder with your tools and carefully make your way to the leaking section of the concrete tile roof.
For example soak the downhill side of a chimney first then each side then the top on both sides.
What is extremely important is that this metal sheet isn t horizontal.
Epoxy and polyurethane can save a damaged concrete roof.
If a leak is difficult to find enlist a helper and go up on the roof with a garden hose.
Start low soaking the area just above where the leak appears in the house.
Check the entire roof surface look out for ponding water and inspect the plumbing lines.
Seam tape large cracks with epdmcoatings adhesive seam tape.
Repair large holes with concrete patch.
Isolate areas when you run the hose.
The screeding can then be replaced.
New repairs using epoxy and polyurethane foam when performed properly offer years of relief from leaks.
Advances in crack repair for home foundations extend to needed repairs in concrete roofs.
Once the primer is dry apply an elastomeric sealant to the cracks corners and damaged areas and then to the entire roof.
For thin or hairline cracks low viscosity epoxy resins will more often achieve better results.
Follow up with a second coat after 24 hours have passed.
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.
Tips on how to manage leaking concrete roof tip 1 find the leakage source.
