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Felt roof repair
This article addresses patch repairs of felt covered roofs.
Patch repair is doomed in the sense that once felt begins to go, it usually doesn't last well whatever you do. However its sometimes possible to get e xtra years before refelting is needed.
Patching
Make the surface onto which a new felt patch goes fairly even, felt always needs support. Clean any muck off. Better durability is gained by filling a ny cracks, holes etc with a bitumen based mix to provide an even-ish base. Apply a layer of bitumen adhesive/paint and apply the felt patch. Patches s hould have a good overlap to help keep it there. Paint more bitumen around and over the edges for maximum adhesion. Adding clout nails is optional - t hey attach felt well, but also pierce it.
Gloops
Various gloops can be bought for filling cracks. They seem to be largely on the optimistic side.
Home made felt patching
Basic roofing felt is only rag felt plus bitumen, plus a little sand on top . This is easy enough to replicate using scrap material. Follow the method in 'patching' above, but use cloth in lieu of roof felt, painting it all ov er with bitumen once applied. A stippling brush action helps avoid the clot h moving.
Once done, throw sand onto it. This reduces heat absorption, avoiding the r isk of it melting on a particuarly hot day. It also toughens up the surface to some degree.
Home made gloop
Filler for roof cracks etc is simple to make, using sand plus a little bitu men adhesive/paint. Gloop can't be counted on to repair a crack on its own, but may be used to create an even bed onto which new felt may be laid. It also acts as a secondary barrier to water.
See also Bitumen
Categories: Roofing | Adhesives | Repair | Save Money | Sheds