I’ve recently moved into a house with a recent (5yrs) flat roof extension out the back. The extension has parapet walls topped with coping stones. Not long after we moved in we noticed damp at the right angle with the ceiling and after an inspection of the roof it seems there is either no DPC or only a partial DPC under the stones and it is leaking into the walls through the joints. Additionally the drips on the coping stones were bridged with mortar at the joints leading to water running down the walls and further ingress. At the moment I’ve stemmed the damp by filling the joints with CT1 and covering in a tarp secured with bricks. I’ve also ground out the mortar with a grinder.
I’ve had a couple roofers offer different solutions, one would like to lose the stones and recap in lead, another would lift and re-bed with a DPC. My question is what would you do?
I’ve had a couple roofers offer different solutions, one would like to lose the stones and recap in lead, another would lift and re-bed with a DPC. My question is what would you do?
