Water leaking through window lintel

[Sowler]

Like a couple of others it seems I have a leak due to this driving heavy rain. Its dripping through where a blind has been drilled and attached to the lintel/reveal. Its been there for a year and never had a problem until today. From what I can see on the outside the lead sheet laid above the uPVC window has sagged flapped down somewhat and there is now a bead of water sat in there. I can only guess its coming in through there. The house is poured concrete cavity wall construction. What is the best course of action to seal the lead back on if that is the problem?

Thanks

[Simpo Two]

Blast it with high quality outdoor sealant.

[Sowler]

Thats what I thought. What would you recommend.

http://www.screwfix.com/p/no-nonsense-exterior-fra...

or

http://www.screwfix.com/p/dow-corning-796-upvc-bri...

[Simpo Two]

I doubt it makes much difference. IIRC some set in damp conditions; that might be the decider.

It happened to me once. There was a gale and rain bashing on an upstairs window which I'd left open a few inches. Water was pouring in. I quickly closed the window and... water was still pouring down the inside of the glass Took a moment to figure it out!

[mattdaniels]

I share your pain OP. Been up since 2am dealing with this.





Still, it's one way to get the bloomin stubborn wood chip off the kitchen wall.

I was going to go to B&Q later to get some exterior sealant but my concern would be that I'm trapping water in the wall before it's had a chance to dry out. Any builders care to suggest the best course of action?

[TA14]

Two other possibilities: over the year mortar snots tend to fall down the cavity and rest on the cavity tray or lintol. Eventually there will be enough to allow water to cross the cavity. Similar with blown insulation. So the cavity may need to be cleared out.

[Mr GrimNasty]

Make sure you don't fill any drainage/weep holes on the exterior wall.

You might also have created a leak in any cavity lintel/dpm/cavity tray arrangement with your fixings for the blind, might only have showed up now with the extreme weather.

[mattdaniels]

Mr GrimNasty said:

Make sure you don't fill any drainage/weep holes on the exterior wall.

What am I looking for? Holes in the pointing?

Mr GrimNasty said:

You might also have created a leak in any cavity lintel/dpm/cavity tray arrangement with your fixings for the blind, might only have showed up now with the extreme weather.

They were there when we bought the house. Previous owners never coughed up the FENSA certificate for the double glazing, glad we witheld some funds now.

[Mr GrimNasty]

mattdaniels said:

What am I looking for? Holes in the pointing?

Anything that looks intentional, might be a plastic slit or like a very narrow mini airbrick, or just a horizontal or vertical slot of missing pointing, no way of telling what anyone might have done from here!

[Just1Cornetto]

Sowler said:

Like a couple of others it seems I have a leak due to this driving heavy rain. Its dripping through where a blind has been drilled and attached to the lintel/reveal. Its been there for a year and never had a problem until today. From what I can see on the outside the lead sheet laid above the uPVC window has sagged flapped down somewhat and there is now a bead of water sat in there. I can only guess its coming in through there. The house is poured concrete cavity wall construction. What is the best course of action to seal the lead back on if that is the problem?

Thanks

Mate, did you ever resolve this? Having exact same issue with window in kitchen.

[FMOB]

Just1Cornetto said:

Sowler said:

Like a couple of others it seems I have a leak due to this driving heavy rain. Its dripping through where a blind has been drilled and attached to the lintel/reveal. Its been there for a year and never had a problem until today. From what I can see on the outside the lead sheet laid above the uPVC window has sagged flapped down somewhat and there is now a bead of water sat in there. I can only guess its coming in through there. The house is poured concrete cavity wall construction. What is the best course of action to seal the lead back on if that is the problem?

Thanks

Mate, did you ever resolve this? Having exact same issue with window in kitchen.

Holy thread resurrection!

[Mad Maximus]

Arnt wake weep vents a massive problem on newish built houses ? Perhaps yours is one.

[duckson]

We had something that appears to be similar and it was the felt under the roofing tiles with holes in it, was letting water down the cavity.

[Ian Geary]

And just to add to this

My ridge tile pointing had gone, letting water in that was tracking down the felt, and then reaching the holes adjacent to the wall (where the felt had broken down)

The point is there can often be more than one point of failure, and the source of the problem not always where the water is turning up.

Hth

Ian

[dhutch]

Sowler said:

Thats what I thought. What would you recommend.

http://www.screwfix.com/p/no-nonsense-exterior-fra...

or

http://www.screwfix.com/p/dow-corning-796-upvc-bri...

You can paint acrylic, if its a wooden window frame.

[48k]

Another bot ressurrecting an 11 year old thread

[dhutch]

I expect so.