Re Felt For Shed.

[david small]

Shed is 12x8 foot. Would one roll of felt 10x1 metre be sufficient?

[bookbinder]

10 metres = 32 feet
1 metre = 3.2 feet

[david small]

That’s going to be short then as insufficient for the edges.

[bookbinder]

12 x 8 feet = 96 square feet
32 feet x 3.2 feet = 102.4 square feet
So, you should be ok with your 10 x 1 metre roll.

[bookbinder]

It all depends on how you lay the felt on the shed roof.

[gingejbee]

Since the felt is metrically supplied, it would make sense to measure the shed roof metrically as well. Why complicate matters by using two measurement systems?

[Zacs-Master]

Laid lengthways (which it should be anyway) with a 4” overlap you should just have enough.

[Old_Geezer]

Depends on how much of a patchwork you are happy with.
32' gives 2 lengths plus an 8'×3.2' leftover which you'd be messing about with to cover the 12'×1.6' rest; and that's assuming no waste when cutting.

[Gizmonster]

Bear in mind that if your shed has an angled roof like most do, the area of the roof will be more than 96 sq feet.
10 sq metres = 107.6 sq ft.
Plus your roof will probably overhang at the bottom edge and you'll need the pieces to overlap around all the edges.
It'll be tight and you might get away with it, but personally I'd get 2 rolls and put plenty of overlap on.

As an extra note, I'd also spend a bit more and use a really good thick felt. I went round B & Q testing the rolls of felt - if you can rip it with just your hands, don't buy it. The one I eventually bought, I couldn't rip it using my hands :)

[The Builder]

This is how it would work out in practice David.
Lay an eaves course (gutter level) along one side.
Go around to the other side and do the same.
Lay the ridge course so that it laps over each of the other two courses.

That's 3 courses each 3.6m long (12').

So........... 3 x 3.6 would equal 10.8 metres (linear).

10.8 x 1m = 10.8 sq. metres.

So close, but really not enough :o(

[The Builder]

^^^That's assuming it's a pitched roof with two slopes.

Same principle applies for a monopitch, but you'd still need 3 courses........... so much the same as above.

[gingejbee]

^At last, somebody else who appreciates the simplicity of "metric"!

[david small]

Thank you all for your replies. I will buy two rolls as one is just too short.
£50 a roll =£100 so not cheap, but I do not want a soaking shed and it’s contents.