Gable End Wall / Roof Verge Insulation question

[ricky101]

Hi,

Just started to renew the cement verges with dry verges on my 1980 Barratt bungalow.

Its a Tiled Trussed rafter roof going over the breeze/cavity/brick gable end wall with a projecting verge of about 4" in total.

Under the felt, where goes over the wall, there is a complete covering of fiber glass insulation on top of the complete end wall.

The felt above the fiber glass has totally disintegrated but when I lay some new felt, because of this insulation pushing up, its stands really proud, even touching the underside of the tiles in places.

Just wanted to know the full intention of the fiber glass and if its applicable to todays standards and if I should reinstate it fully as some of it is very mucky and soaked etc

Am guessing it may have a few purposes, one to stop muck etc dropping down the cavity , to insulate the top of the cavity and possibly, to help act as a diverter to any water coming it so its quicky driven away off the cavity because of its mound effect it produces ?

thanks

 

[ricky101]

Can anyone help please ?

 

[terrypin]

It has little use tbh and I would get rid or replace with new. It certainly should not be wet and is not meant to be a barrier for the ingress of water as there should not be any ingressat all.

 

[Alastairreid]

The insulation should be clear of the eaves.

 

[ricky101]

Hi,

Well the original insulation spans across the cavity and brick/block work and is butted up against the internal rafter and the floating rafter.
Done deliberately as they have started nails into the rafters then bent them over to hold the insulation in place.

Looking around seems the main idea of the insulation should be just in the top of the cavity to stop fire spread.

Think they have also used it to even out the brickworks sharp edges to stop it puncturing the felt as the bricks have just been built up normally /horizontally, no nice clean angled finish.