Inside - you'll see the stain on the joining property wall. The plaster is rough to the touch, but doesn't appear to be seperating from the wall at all
Porch Gap - there seems to be a strange gap all along the top of the porch which doesn't seem to serve much purpose, other than possibly allow a "channel" of water to go behind the exterior render? That appears to line up close to where the actual staining is on the inside of that wall
What could be the most likely cause? We are looking to fill the exterior render and add flashing to help prevent water seeping back into the property. Would it be sensible to fill the gap on the top of the porch?
Hi whiffrug Fill the vertical and horizontal gap with a flexible building mastic. You will probably always have damp issues due to the nearly flat roof but fitting a flashing lapped under the rendering will help but seal the lower edge of the flashing to the flat roof. Regards S
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!