Originally Posted by lucknow
I had an old time roofer working for me for many years. We ran into a problem just like yours. The guy built this big structure and could not afford the roofing he wanted. Well, Old Bill could make a good roof out of anything and just to save this guy's butt, because we didn't make any money on the job we roofed the entire 5000 sq. ft. roof with 40lb felt. Now this roof was covered with valleys and dormors and was sitting right on the frigging beach where the wind blows at 60mph for the whole winter. We nailed the felt on and then we nailed 1 by 2's along all the eves, rakes and at 2ft centers over the entire roof.
Now this is a true story, No BS cross my heart. This customer finished the entire inside of this house with the 40lb roof and he didn't even put the stupid cedar shakes he wanted on it until 2 years later.
Old Bill told me later that the house he grew up in, in northern Ontario only had a 15lb felt roof that they would replace every 7 years or so.
That does not surprise me in the least. I have seen attempts at repairing individual concrete tiles on certain roofs fail again and again.
Case and point, tile failure anywhere near the valley. New tile placed, roof leaks. Remove several tiles, replace underlayment, replace tiles no leak.
Imagine that, the felt is important?