MIL needs the felt on her 20+ year old flat roof replacing. Underlying
timber is apparently sound, just needs felt and bitumen (or whatever the
best way to do it is). What sort of price per square metre should she be
looking at?

Also, of the two people that have had a look already, one says "I don't put
stones on top", the other says "You must have stones on top". Not sure what
they mean by that (the gritty stuff on top?). Is it necessary or for visual
appeal only?

Ta.

Al.

On 20 May, 10:03, Al wrote:
MIL needs the felt on her 20+ year old flat roof replacing. Underlying
timber is apparently sound, just needs felt and bitumen (or whatever the
best way to do it is). What sort of price per square metre should she be
looking at?

Also, of the two people that have had a look already, one says "I don't put
stones on top", the other says "You must have stones on top". Not sure what
they mean by that (the gritty stuff on top?). Is it necessary or for visual
appeal only?


My understanding is that the stones are to absorb heat and delay
cracking of felt and melting/weakening/cracking of bitumen at joints.
Another option is painting the surface of the felt with metallic
silver-coloured reflective paint.

Toom

My understanding is that the stones are to absorb heat and delay
cracking of felt and melting/weakening/cracking of bitumen at joints.
Another option is painting the surface of the felt with metallic
silver-coloured reflective paint.

Thanks, the roofers have confirmed that's what the stones are for, and the
one that doesn't use stones says he uses a combination felt with 'metal
threads'.

Whatever, the third one to have a look as quoted the lowest price, complete
with stones, so she'll probably go with him.

Al.

"Toom Tabard" wrote in message
...
On 20 May, 10:03, Al wrote:
MIL needs the felt on her 20+ year old flat roof replacing. Underlying
timber is apparently sound, just needs felt and bitumen (or whatever the
best way to do it is). What sort of price per square metre should she be
looking at?

Also, of the two people that have had a look already, one says "I don't
put
stones on top", the other says "You must have stones on top". Not sure
what
they mean by that (the gritty stuff on top?). Is it necessary or for
visual
appeal only?


My understanding is that the stones are to absorb heat and delay
cracking of felt and melting/weakening/cracking of bitumen at joints.
Another option is painting the surface of the felt with metallic
silver-coloured reflective paint.

Toom


But silver (grey) paint reflects less sunlight than white paint? Why not
paint the roof white?

Stones are easily moved, pinched by birds and the like! I'm not convinced
they do a great deal.

Fredxx wrote:
"Toom Tabard" wrote in message
...
On 20 May, 10:03, Al wrote:
MIL needs the felt on her 20+ year old flat roof replacing. Underlying
timber is apparently sound, just needs felt and bitumen (or whatever the
best way to do it is). What sort of price per square metre should she be
looking at?

Also, of the two people that have had a look already, one says "I don't
put
stones on top", the other says "You must have stones on top". Not sure
what
they mean by that (the gritty stuff on top?). Is it necessary or for
visual
appeal only?


My understanding is that the stones are to absorb heat and delay
cracking of felt and melting/weakening/cracking of bitumen at joints.
Another option is painting the surface of the felt with metallic
silver-coloured reflective paint.

Toom


But silver (grey) paint reflects less sunlight than white paint? Why not
paint the roof white?

its funny what you can sell people


Stones are easily moved, pinched by birds and the like! I'm not convinced
they do a great deal. Providing shade, with air moving between them to carry away absorbed heat, much reduces the thermal cycling of the felt.


NT

Also, of the two people that have had a look already, one says "I don't put
stones on top", the other says "You must have stones on top".

One might have been looking at using one of the rubber membrane
materials (EPDM) which I don't think need a stone layer (and in fact
might be damaged by them)

On 20 May, 22:09, Colin Wilson
o.uk wrote:
Also, of the two people that have had a look already, one says "I don't put
stones on top", the other says "You must have stones on top".

One might have been looking at using one of the rubber membrane
materials (EPDM) which I don't think need a stone layer (and in fact
might be damaged by them)

With roofing felt go for one with polyester carrier as opposed to
cheaper fibre (rag as was called) or glass fibre. Those with mineral
granules cover give underlying "felt" protection from the elements and
is available in choice of colurs normally; grey/slate-brown/red-green.
On a shed you would normally just apply 1 layer; eg
http://www.wickes.co.uk/Polyester-Ro...et/invt/164026