decided in the end to go for an 11mm osb board roof cover, and will use shed
roofing felt, this is for the shed part of the aviary im building (i asked a
week ago about coroline sheets, but not impressed with them and other
reasons i dont want to use them)

idealy i'd like to use a felt that i do not have to nail on, as i have a
pretty low angle, i think i worked it out to be about 5 degrees,

i guess the torch on felt would be best, but that means fannying about
buying a torch and a gas bottle, just for one job,

so i was wondering about either the self adeshive felts, or the cold applied
bitumin adhesive that toolstation sells, and normal felt,

but i keep reading about needing 2 layers, an underlay membrane type thing,
then a cap sheet,

can i just get a single layer felt that i can stick down without any special
tools? area to cover is approx 3 meters by 2 meters, and as usual money is
tight, so these 2 layer jobbies are out, as it's about 35 quid each layer,
but i dont want the cheapest stuff you can get, that's paper thin and a bee
farting on it tears it.

On Mon, 22 Aug 2011 18:09:28 +0100, "Gazz" wrote:


but i keep reading about needing 2 layers, an underlay membrane type thing,
then a cap sheet,

Why not use fibreglass? Easier than felt, longer life and much more
water resistant.

On Aug 22, 6:09*pm, "Gazz" wrote:
decided in the end to go for an 11mm osb board roof cover, and will use shed
roofing felt, this is for the shed part of the aviary im building (i asked a
week ago about coroline sheets, but not impressed with them and other
reasons i dont want to use them)

idealy i'd like to use a felt that i do not have to nail on, as i have a
pretty low angle, i think i worked it out to be about 5 degrees,

i guess the torch on felt would be best, but that means fannying about
buying a torch and a gas bottle, just for one job,

so i was wondering about either the self adeshive felts, or the cold applied
bitumin adhesive that toolstation sells, and normal felt,

regular felt stuck down with cold bitumen adhesive is cheapest and
just as effective as any other method. It just takes a while to set,
and dont spill it!


but i keep reading about needing 2 layers, an underlay membrane type thing,
then a cap sheet,

can i just get a single layer felt that i can stick down without any special
tools? area to cover is approx 3 meters by 2 meters, and as usual money is
tight, so these 2 layer jobbies are out, as it's about 35 quid each layer,
but i dont want the cheapest stuff you can get, that's paper thin and a bee
farting on it tears it.

Use 2 layers of the capsheet.
http://wiki.diyfaq.org.uk/index.php?title=Roofing_felt
http://wiki.diyfaq.org.uk/index.php?title=Bitumen


NT

"Gazz" wrote in message ...
decided in the end to go for an 11mm osb board roof cover, and will use
shed roofing felt, this is for the shed part of the aviary im building (i
asked a week ago about coroline sheets, but not impressed with them and
other reasons i dont want to use them)

idealy i'd like to use a felt that i do not have to nail on, as i have a
pretty low angle, i think i worked it out to be about 5 degrees,

i guess the torch on felt would be best, but that means fannying about
buying a torch and a gas bottle, just for one job,

so i was wondering about either the self adeshive felts, or the cold
applied bitumin adhesive that toolstation sells, and normal felt,

but i keep reading about needing 2 layers, an underlay membrane type
thing, then a cap sheet,

can i just get a single layer felt that i can stick down without any
special tools? area to cover is approx 3 meters by 2 meters, and as usual
money is tight, so these 2 layer jobbies are out, as it's about 35 quid
each layer, but i dont want the cheapest stuff you can get, that's paper
thin and a bee farting on it tears it.


I don't think any felt would stick well enough to OSB so it would be better
to nail a layer of plain felt first, then stick the finishing felt to that.

Mike

On Tue, 23 Aug 2011 08:36:46 +0100, MuddyMike wrote:

I don't think any felt would stick well enough to OSB so it would be
better to nail a layer of plain felt first, then stick the finishing
felt to that.

I'm not sure how well a single layer stuck to OSB will cope with the
movement (thermal and humidity) of the OSB. OK it's not going to move
as much as planks but it will move. I suspect a nailed under layer
and stuckon cap sheet gives enough freedom of movement to avoid any
problems.

Not sure what the OP has against nailing other than the almost flat
roof. Nail but stick just the bottom edges down to prevent capillary
action between the layers?

--
Cheers
Dave.

Interesting to look at the lifespan quoted by 3M roofing products.

There is EPDM rubber sheet, applied with a contact adhesive, offcuts
cheap on Ebay and probably a brand like Firestone available?

On 23/08/2011 11:43, js.b1 wrote:
Interesting to look at the lifespan quoted by 3M roofing products.

There is EPDM rubber sheet, applied with a contact adhesive, offcuts
cheap on Ebay and probably a brand like Firestone available?

I would have liked to use that when I did a flat roof a few weeks ago,
but due to some complex shapes, I went for fibreglass instead.

SteveW