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15 pound and 30 pound

2007-12-07 04:58:26 · 8 answers · asked by samuel s 1 in Home & Garden Do It Yourself (DIY)

8 answers

William B is correct, a roll of felt covers approximately one square.

EDIT:

Sorry, I was thinking of waterproof underlayment. I must be getting senile!

Felt covers approx. 4 squares per roll (both 15 & 30 #) THe 30# is just a larger/heavier roll.

2007-12-07 05:05:40 · answer #1 · answered by Martin 7 · 0 0

30# is twice as thick as 15# and covers half as much
30# covers 200 square ft or 2 squares and 15# does 400 sq ft or 4 squares as it's called in the roofing business. Also the new 10 square rolls (1000 sq ft) underlayments such as Tri-Flex (TM) are gaining popularity. These are a rubberized synthetic that is starting to make inroads in the use of felt underlayment.

2007-12-07 22:09:07 · answer #2 · answered by deanpitman 2 · 1 1

Depends on manufacturer and specific line, but usually more than just one square. They have the coverage on them. I used to work for a builder, so I bought stuff like that in bulk and then figured out how much was needed for a house. I think the felt I bought was 430 sq.ft. for 15LB Some reason that numbers seems to leap out at me. But I know it was more than 100 sq.ft. 30LB we used just for the valleys, but I'm thinking 215 or something.

Point is the coverage should be on the roll somewhere.

2007-12-07 13:21:15 · answer #3 · answered by robling_dwrdesign 5 · 0 0

You can figure on 400 sq.ft per roll. Do the math and then add a roll cheap insurance when you got open roof.

2007-12-07 21:14:14 · answer #4 · answered by maxheadroom 1 · 0 0

I don't know what fejt is but if you meant roofing felt, the answer is 100 ft. by 3 ft. is 300 square feet.

2007-12-07 13:02:25 · answer #5 · answered by killbasabill 6 · 0 0

check online - different mfr's may sell different size rolls - they are usually 3" wide - maybe 150' long = 450 sq ft, but you are supposed to overlap each higher row by at least 6" so you have to take that into account

2007-12-07 13:02:35 · answer #6 · answered by Anonymous · 0 0

1 square, or 10 ft by 10 ft.

2007-12-07 13:01:10 · answer #7 · answered by William B 7 · 1 1

ANNNDDD YOUR QUESTION IS

2007-12-07 13:00:36 · answer #8 · answered by Anonymous · 0 2

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