Damp patch corner of window

[MA1992]

Recently painted after moving into new home. Looked great but a few weeks on noticed that the paint was peeling off in a dusty texture. Noticed there’s a clear line rising from the bottom corner of the window up the wall, looks like the wall is getting damp and it’s rising up the wall.

hard to get a picture that shows because of the white walls. Doesn’t look like the last owner put any sealant between the window and the render, does this need to be done or is it potentially the window / window sill?

 

[Swwils]

Seal between render and window can help.

Use a neutral cure low modulus silicone - seal under the cil aswell but not the bottom of the window that's sitting on the cil as that is the drain for the window.

 

[tell80]

The dash is very poor - probably failing from day one.
The new frame seems to have been butted up into roughly the outline of the previous frame without taking into account that they were different frames.
The sill should have had horns that fitted tight to the brickwork in the reveal & at the face.
The frame with a thick bead of pre-applied sealant should have been set tight against brickwork or render.
They didn't use a plastic corner bead - instead they've used ceramic tile edging trim.

Perhaps the best you can do is to seal everything with silicone or similar - use a soapy finger for smoothing off.
Wait & watch the stained interior reveal (s) - if it dries up then sand a little & use stain blocker and re-paint. If ugly water damage shows/persists then hack off and re-plaster with a 3:1 mix of sand and lime.















Moisture is possibly entering all around the frame but particularly at the sill and reveal.

 

[Nige F]

The dash is very poor - probably failing from day one.















Moisture is possibly entering all around the frame but particularly at the sill and reveal.

Looks like monocouche render. Or is it sand+ lime ? probably failing - like your eyesight tell?

 

[Nige F]

Use a neutral cure low modulus silicone - seal under the cil aswell but not the bottom of the window that's sitting on the cil as that is the drain for the window.

You know it looks to me like they have sealed the bottom of the window - like you say they shouldn't have. Adding to the problems

 

[Swwils]

You know it looks to me like they have sealed the bottom of the window - like you say they shouldn't have. Adding to the problems

Depends if it is an intended drain or not.

 

[MA1992]

You know it looks to me like they have sealed the bottom of the window - like you say they shouldn't have. Adding to the problems

how can I tell if they’ve sealed it? Which part?
Apologies windows aren’t my speciality

 

[MA1992]

Seal between render and window can help.

Use a neutral cure low modulus silicone - seal under the cil aswell but not the bottom of the window that's sitting on the cil as that is the drain for the window.

cheers, I’ll have a look at going around the exterior of the frame and the sill