Richard wrote in message . 4...
My neighbour and I have had our garage roof re-felted. It's (obviously) a
flat roof with the slope front to back. I'm happy with the work, but
neighbour asked whether felt strips should run front to back (with slope,
as has been done) or side to side? Any please care to voice an opinion?
Many thanks,

Richard
It should be laid from the lowest point the back, to the highest point
the front.
so that any water running down the roof flows over the seam and on to
the other sheet.All seams should be sealed with either hot pitch or
glue.
The under felt should be laid at 90 degrees ie side to side.Rob