Part 0800.0005

[FiggyPudding]

Have previously posted on here about problems with my roof. It leaks due to 2 lengths being joined up.

 

We've decided to replace it completely, but don't want to make an expensive mistake, so would be grateful for advice on how to replace & with what. At the mo, the onduline is still up there, with various buckets & containers dotted inside to collect the leaks.

 

Many thanks.

 

PS For those that use the ikea shower curtains , how do you attach them to the wood ? I've nailed my in, but this appears a temporary measure because the plastic is gradually tearing.

[Redwing]

Could you remove the roof and place it back with the overlap bigger? then seal the join inside with some roofing mastic?

[sjp]

as Redwing says it sounds like the overlap is to small there should be at least 100mm/4 inch in old money overlap. if you've have that then it could be that the roof pitch is to shallow so the water is running back up the roof in which case the top of the slope needs to be raised but that means stripping the sheets of the adding timber to each of the supports tht the sheets sit on with the exception of the bottom one rejuicing the size at each support about an inch every beam these should be no more than 3 feet apart on a shallow pitched roof for snow loading. then replace the onduline bottom sheet first appling silicone sealant to the overlap first to bed the top sheet on to as an extra precaution the joints needs to be clean and bone dry. if the top of the roof is 4inch/100mm higher than the bottom over 12 feet assuming that 2 six feet sheets have been used then it might just need the joint sealing best way is to take the top sheet off clean and dry the joint apply the silicone refix the sheet

[FiggyPudding]

Hi, thanks - the depth of the roof is 9ft, so 2 sheets used. It looks to me like the roof *is* too shallow. So how much taller should the front be, than the back ?

 

I think the husband & I have been paralysed with fear with this bloomin' roof !

[sjp]

if it were me I'd make it at least 4inch highier then step it down 3 2 1 0 if the supports or 3 foot apart.

but it wouldn't suprise me it's only 1 inch

[Plum]

Thank you sjp for the roof lesson, helps me planning a run.

[kevtheplumber]

did this yesterday replaced the whole roof and overlapped a bit further, raised the back a bit higher also and works a treat now just be careful cutting it especially in the cold as it is more brittle

[sjp]

Thank you sjp for the roof lesson, helps me planning a run.

glad to help

[Plum]

I will be back