Leak Help! Cavity tray? Roof? Help!

[Ollyfp]

Is it worth carrying out an experiment? You could tape/fix a sheet of plastic over the area for a few weeks to see if the problem persists. You've been living with this for 5 years. It must be getting you down a bit. Really hope you get it sorted!

 

[Luke1988]

If you force compressed air in through a weep vent, you should be able to hear it emerging from the other weep vents... if they exist.

Yeah tbh I’ve never seen water coming out of them but it’s also hard to see when you’ve got streaming water coming down anyway

 

[Ollyfp]

Yeah tbh I’ve never seen water coming out of them but it’s also hard to see when you’ve got streaming water coming down anyway

Compressed air might force sitting water out through the vents. Have you got a leaf blower or a wet and dry vac with an output? Worth a try!

 

[Ollyfp]

Have you checked that your window drain holes are clear? There should be at least two that are accessible to clean with a pipe cleaner or a length of electrical cable where the base of the window meets the sill.

 

[freddiemercurystwin]

There should be a tray immediately above the flat roof, if installed correctly they cannot allow rainwater past ergo the tray must be installed incorrectly/missing.

 

[Luke1988]

Have you checked that your window drain holes are clear? There should be at least two that are accessible to clean with a pipe cleaner or a length of electrical cable where the base of the window meets the sill.

Not checked but the last water test wasn’t on the windows and still leaked

 

[wessex101]

How can I check that?

The only way is to look, so a boroscope or remove a brick. If the damp is due to lack of stopends then the damp tends to be concentrated towards the ends of the tray. If the damp is below the middle of the tray then it is unlikely to be due to this.

 

[Luke1988]

There should be a tray immediately above the flat roof, if installed correctly they cannot allow rainwater past ergo the tray must be installed incorrectly/missing.

Well they’ve been “looked at “ twice so would hope they are there

The only way is to look, so a boroscope or remove a brick. If the damp is due to lack of stopends then the damp tends to be concentrated towards the ends of the tray. If the damp is below the middle of the tray then it is unlikely to be due to this.

Yeah it’s hard to tell where the water is coming from. When the garage was leaking we had a hole in the ceiling and water was coming in under the blockwork and out across a beam.