No felt under tiles

[RichD1]

Hi Guys, just bought a 1920's semi which has no felt under the tiles.

Roof is probably a 45 degree pitch with small clay tiles. The backs where then filled with mortar which over the years has nearly all ended up on the loft floor insulation making the loft totally un-useable.

Having inspected the roof timbers and battening, they are all in very good order with no signs of water penetration.

Not wishing to run to the expense of a complete removal of tiles and new felt and battens, can I attach overlapping breathable & waterproof roofing paper to the backs of the joists? This will cut down on the dust and sand falling from the roof and allow me to properly insulate and put down a floor to make the loft useable.

Richard

 

[noseall]

Not wishing to run to the expense of a complete removal of tiles and new felt and battens, can I attach overlapping breathable & waterproof roofing paper to the backs of the joists? This will cut down on the dust and sand falling from the roof and allow me to properly insulate and put down a floor to make the loft useable.

Richard

Yes you can. Only problem is that if you do have a roof leak, you will only know about it when the wall plate has rotted through.

 

[RichD1]

I did think of that so I was contemplating leaving the final layer of paper just a little short of the wall plate so any water would then fall on the ceiling.

 

[pilsbury]

This is precisely the situation in the house I am about to purchase. Roof seems watertight, however the mortar on the back of the small clay plain tiles is covering the loft in dust. Your idea to fix membrane on the rear of the rafters serves only as a dust guard rather than weatherproofing. Still, serves a purpose