Utility room roof

[Joe Shmoe]

Guys,

I'm building a wooden porch attached to the side of my house. Its not for the front-door though - I will be putting a freezer and washing machine inside and using it as a little utility room. Obviously it will have electrics and plumbing and a proper door, and I will be plasterboarding the inside to make it all nice etc.

However, I am struggling with what to do with the roof? How do I stop water running down the pebble dash wall and then seeping behind the structure ?

I haven't decided what materials to use for the roof, and as its only a small structure 1mx3m, cost probably isn't an issue. Can anyone advice on the best way to do a roof so that I minimise the chance of any water seeping down the wall and causing damp ?



Thanks.

 

[Dibs-h]

Guys,

However, I am struggling with what to do with the roof? How do I stop water running down the pebble dash wall and then seeping behind the structure ?

It's called flashing - http://www.diydoctor.org.uk/projects/leadflashing.htm should give you an idea. Not the best picture.

HIH

Dibs

 

[Lons]

What Dibs says

You need to cut a groove with an angle grinder / stillsaw about 30 mm deep or so and about 150mm above the roof / wall join, the full width of the roof plus extending 100mm or so past at each end.

Lead is folded to slot into the groove and fixed (traditionally with lead wedges / scrap) but easier and more secure if you buy some purpose made stainless clips from screwfix or toolstation. Lead is dressd down the wall and down on to the roof then groove is pointed with mortar or a specialised silicone.

Note that the wall below the groove will need to be cleared of the pebbles as they will be too "bumpy".

I prefer the belt and braces approach and always seal the joint first with adhesive flashband (after applying a primer) just in case

You can get good advice from the calder lead website if you need it.

cheers

bob