Strawbale sarking? Can't find screws

Hi everybody.

I want to do a strawbale sarking on my roof. But can't find 600 mm 2ft long screws. Any ideas?

Thanks guys.

Strange I was  in Leroy Merlin * the other day and I did not see any either :-)
How exactly do you want to use these screws ? Would wooden batons work?

David

* well known French DIY store

David Livingston wrote:Strange I was  in Leroy Merlin * the other day and I did not see any either :-)
How exactly do you want to use these screws ? Would wooden batons work?

David

* well known French DIY store

David, i rarely go to leroy merlin. I'm usually buying from pro suppliers! But more than 450mm, is hard to get!

Do you understand how a sarking work? Basically you make a box of the thickness of your insulation, at the outside edge of the walls, on the existing roof. Then fill that with the required thickness of rigid insulation, then lay some battens 8x4cm for example, above the insulation, at the vertical of the rafters, which are completely underneath the whole complex. Then link the batten and the rafter with a very long screw. Which compresses the insulation a bit, and serves as a support for the roof slats, holding either the tiles or in my case, "tole bac"

One screw every meter or so. The closest i am, to a good price, now, is 600€ for 400 screws. Still a bit dear!

How about changing the design?  Instead of screws maybe run steel wire between the bales in a loop from the batten to the rafter and back, then tighten it by twisting the ends of the wire together.  Put the twist where you can tuck it down between the bails out of the way.