GRP Valley help please

[Mark C Johnson]

Good afternoon all. I am having a kitchen extension in my bungalow and am concerned that the GRP gullies have not been fitted properly by the roofer. They have sanded strips up both sides but have been told by the builder that they don’t mortar them in anymore. Further, there are no gully boards to support the gullies and no strips of felt running under the gullies. Also, the existing and new felt has not been overlapped under the gullies. It just goes about 2 inches over the edge of the gully and I can see daylight coming in as per the photos. I think it will leak?
Lastly, should the top of the gullies be treated with lead?
Thanks in anticipation of your help. Mark C Johnson

 

[datarebal]

Trying it on get him back

 

[Mark C Johnson]

Trying it on get him back

I presume you mean by that it's all wrong or is there anything specific I should quote? Thanks, Mark

 

[datarebal]

It's all wrong . See graphic from klober . Regardless of make the principles the same .

 

[Makie]

It's all wrong . See graphic from klober . Regardless of make the principles the same .

Not really, it's all area dependent too.

It doesn't happen in Scotland anymore yet we still use grp valleys

 

[datarebal]

What doesn't happen ?

 

[Makie]

What doesn't happen ?

Cement in the valleys. Very rarely will you see it up here.

 

[datarebal]

So how would you keep the small cut tiles in?

 

[Makie]

So how would you keep the small cut tiles in?

Clips and glue these days. Sometimes a nail with some wire.

 

[^woody^]

There are two types of fibreglass valleys - wet, which is sealed with mortar, and dry which is not.

Your roofer is correct in a sort of clueless cowboy way.

 

[Mark C Johnson]

There are two types of fibreglass valleys - wet, which is sealed with mortar, and dry which is not.

Your roofer is correct in a sort of clueless cowboy way.

Hi Woody, would I be correct in saying this is a wet gully as it has sanded strips along the edges? Also should there be valley boards and or ,at least a strip of felt beneath the grp valley? Thanks, Mark

 

[datarebal]

There are two types of fibreglass valleys - wet, which is sealed with mortar, and dry which is not.

Your roofer is correct in a sort of clueless cowboy way.

Not in this case.
Read the post again

 

[^woody^]

Hi Woody, would I be correct in saying this is a wet gully as it has sanded strips along the edges? Also should there be valley boards and or ,at least a strip of felt beneath the grp valley? Thanks, Mark

Yes you are correct. Fibreglass trays need to be supported, unless the manufacturer states otherwise - and I don't think that there are any that do not need support.

 

[^woody^]

Not in this case.
Read the post again

There are not wet and dry fix valleys?

 

[datarebal]

Yes , but this one is wet ..