On Jun 25, 8:14*pm, "george [dicegeorge]"
wrote:
Instead of faffing arou7nd with skylights and flashing
why cant I use glass or perspex slates
the same size as the existing slates?

Could I cut down scrap car windows?

Has this already been done, with success or failure?

[g]

Is this your house or an (unheated) outbuilding?

Remember how slates are laid in overlap - the result is 2 slates
thick. So you will have a crud-collection space between the layers.

Remember also that wind and rain blows up under the slates,and into
the space below - or you have a roofing felt.

You'll also have the exposed roofing battens running across you glass
slates as well.

You can get glass pantiles, but I've never seen them used in an
inhabited space - just lofts and barns, and they let a bit of light
through at best.

Car windows are toughened glass and cannot be cut successfully.