how to make a flat roof into a slight ptch roof

DELL · Posted: Fri Aug 05, 2005 9:13 pm

I have flat roof extension which was a outside toilet and coalshed. It`s roof is of the old poured asphalt type and leaks terribly into my kitchen. Would any of you kind gents tell me if I could alter the flat roof to a slight pitched roof. if so how do I go about it. all information would be greatly apprieciated.The building incidently is attached to the house and not a seperate building

nstreet · Posted: Sat Aug 06, 2005 7:36 am

Aahhhh so thats what the leaning tower of Pisa is all about then. Much easier to put on a pitched roof in the firt place

Nige F · Posted: Sat Aug 06, 2005 7:48 am

Poured asphalt? not 3 layer with chippings...The former should last longer,and only leak if you can see cracks. More info please..may not need to renew,shallow pitches tiled can be problems too.

DELL · Posted: Mon Aug 08, 2005 11:28 am

The house is a 1940s semi and the flat roof conversion was done before I bought it. the leak is at the join between the kitchen and the conversion.
I have tried sealers and the like but still no luck. lasts about 3 months then starts to leak again.
I was advised to have a lead flashing fitted into the wall at the join as opposed to the cement one which is in existence and a rubberoid roof covering.
Ithought that a slight pitched tiled roof would be better in that the water would run away from the house.

masona · Posted: Mon Aug 08, 2005 4:36 pm

DELL wrote:

Ithought that a slight pitched tiled roof would be better in that the water would run away from the house.

It would be better, how much angle do you think you can get away with?

Nige F · Posted: Mon Aug 08, 2005 5:18 pm

I thought it was probably the join between roof and wall...cavity wall or solid ? You can pitch a roof as steep as you like, that join is still a weak point and if it`s a cavity you`re lucky because a proper flashing can be inserted, a bit@ a time with plastic cavity trays,and weep holes... If it`s solid

you need just the cover flashing set into the wall, and the wall above needs to be in good condition, pointing etc. Builders Merchants stock the Remedial cavity trays...and a few old plumbers still do leadwork

DELL · Posted: Mon Aug 08, 2005 5:33 pm

to masona
probably 45 degree into the gutter with a decent flashing
could I do it myself

masona · Posted: Tue Aug 09, 2005 6:51 am

DELL wrote:

probably 45 degree into the gutter with a decent flashing

Don't have to have it that high, approximately 15 degree is the lowest.

Quote:

could I do it myself

Don't know but will need building permission approval which is straight forward, pop down to your BCO with a rough darwing and they will tell you what to do.