Rainwater Ingress

[astraman]

I have pitched roof extension on the rear of my house, this is entered through French doors (previously patio doors to the outside). Where the extension roof meets the exterior house wall a lead flashing has been installed along the length of the extension (looks sound) the pitch of the roof is about 30 degrees with bold roll tiles. The problem I have is that when there is driving rain onto the rear of the house water drips into the house at the French doors. I consulted a building surveyor who recommended that the best solution would be to fit a cavity tray so that water penetrating the render and brick and entering the cavity would be redirected outside again. However, finding a builder willing to do this work is proving extremely difficult. How sound is the advice I have been given and are there any alternatives to cure this problem other than a cavity tray? PS foam cavity wall insulation has been used on this property and a bedroom window sits centrally above the extension with a 2" gap above the mortar of the flashing and the tiled window sill of the window. Any advice welcome

MOD

moved as posted in wrong forum

 

[andy]

dunno how its done properly or anything but how about running a peice of guttering above the door to catch the water. direct this to outside. thex use some wood to box it in

 

[masona]

The door frame should have a weather bar threshold which you can buy from timber merchants and plant it on.

Or maybe a porch canopy

 

[towman]

I think you may have misunderstood - I think he's saying the french doors are between the house and the extension - so water is probably penetrating the brickwork somewhere and running down the walls. A cavity tray is the "proper" solution - but you could try waterproofing the brickwork above the extension first - if you can stop the water penetrating the bricks then you may not need the cavity tray. It might also be worth checking on the flashing - has it been sunk deep enough into the mortar and then sealed up properly.

Towman

 

[astraman]

Thanks Towman you have understood the issue -if i had a digital camera i would have posted some pictures-a thousand words as they say.

 

[Nige F]

Cavity Trays of Yeovil make literaly hundreds of specialised retro-fit and new build solutions to this. Used to be the plumber(me) liased with the Brickie over the new build ones. Now I`m retired on the fortune I made Thats why I can reply to you in the middle of the day. Ask your builder`s merchant.

 

[brumylad]

would it be practical to cover the area of exposed brick in leadwork or vertical tile cladding if its only a narrow strip under the window.