New roof over alleyway

[str]

I have a short alleyway leading to the back door of my garage, which I would like to roof.

The new roof would be supported by the elevation of the house and the 10ft high boundary wall, hard up against the garage wall, with a door fitted to the access point.

I'm unsure of what material is best to use - have been looking at the corregated plastic panels, but unsure how best to "seal" the sheet where they butt against the various walls?

Any other suggestions welcome!

 

[noseall]

Use a polycarb' system with glazing bars and wall starter and a lead flashing chased into the wall.

 

[urbansteve]

there are some good non-asbestos fibre cement sheets which are very strong and not all that expensive, around £25 per sheet 3ft x 10ft. would last much longer that the plastic.

 

[str]

yeah, been looking at them in the big sheds, seem decent enough. I only need a run of around 3m, by 1m wide so max 2 sheets.

will they be okay supported on a treated timber framed fixed to the 3 walls?

also, not sure how to make a seal where the panel will meet the walls - obviously lead is ideal but is it not expensive? any other options for me?

 

[urbansteve]

most roofing suppliers of fibre cement products do various lengths, upto around 3.1meters i believe. I use alot of 2.7m sheets when i remove asbestos sheets and replace with fibre cement as seems to be the most common size. Timber supports should be fine 2"x4" fixed with baz fixings and caps. Lead is expensive, you can get a universal self adhesive flashing tape in various widths or you could try your hand a a little sand and cement fillet if your feeling confident.

 

[str]

thanks, the old roof has a cement skew but wasn't sure if this was best?

what sort of pitch do i need to create?

 

[urbansteve]

would like to be able to advise but i only remove and replace onto an existing structure so do not know the angle, however most corrugated roofs do not have much of an angled run off, nost are pretty flat with a tiny incline. contact a reputable roofing company, they should be able to help. Just found a diagram on the wickes website, they suggest between 10 - 15 degrees