Patio and Window frame question

skulltown

A couple of years ago, I had my patio done, and I've recently noticed that part of the plaster has come off on the house wall

where the patio connects to the window. I'm reaching out for some advice on how best to fill this in and repair the area.

Additionally, since I live in a timber-frame home with concrete blocks on the exterior, I am a little concerned about potential water damage. Although I haven’t seen any signs of leakage inside the house yet, I want to be proactive and ensure that this doesn’t become a problem in the future.

Could you recommend the best material or method to fill in the area and advise me on whether I should be concerned about possible water damage? I'd appreciate your insights.

10-10-20

Hi, there should be a plastic layer enbedded in the lower part of the wall between the blocks called a DPM (damp proof membrane) and this normally comes out of the wall (covered over by render) at the point of the window/door opening like this and overlaps with another DPM which runs under the cill of that window there. In effect this means that there should be continuous protection against ingress of water at this point. The render effectively is the most outward protective layer and it's unlikely that there is water ingress at this point.

Really to fix this, the render should be patched up at that point using an good quality external filler, an example of one is below. I'd remove that little square of render then clean out the gap with a toothbrush (so that there are no loose bits), and then fill the gap with the filler as per the instructions on the filler, but pack the filler in well by pushing it inwards. Fill it slightly higher than the surrounding render and then use a slightly damp sponge to tap the surface of the filler to create a slightly raised finish. Then let it set. A lick of paint then after a few days - if you have it - otherwise leave it. All should be good.

https://www.screwfix.ie/p/toupret-exterior-quick-fill-1ltr/986he

skulltown

Great advice I will give the filler a try and thanks for putting my mind at rest