Both of them are inter war 3 bed semis.
No felt under roof tiles.
Item 656632 model 0903000.
One with a simple.
Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.
Advertisement as to the ceiling stain in the living room this may have occurred prior to installing the new shingles.
I have viewed two properties over the last few days that have old roof with no felt until the tiles.
For many years roofers used asphalt saturated felt under roofing shingles and it was historically available in two standard weights.
Then when those shingles were worn out a layer of asphalt shinges was put over that and i don t think roofing felt was used.
The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection.
Wood shingle roofs in dallas used to be nailed onto strapping battens without any roofing felt underneath.
In these instances the felt beneath the older shingles is regarded as adequate.
Definitely a good move.
15 pounds per hundred square feet and 30 pounds per hundred square feet.