Most dimensional/architectural shingles are spec'd down to a 2/12 with special underlayment considerations. I know some of them have abandoned the double felt spec in favor of I&WS.You guys are bumming me out :-(
I am surprised that it is not do-a-ble. A very reputable pro roofer said he could do it with shingles. I guess it could be a little steeper than 2/12 I will have to take a better measure on it today.
The roof is 2.4/12 does that help? I am torn as to what I should do. Many roofers tell me that double felt ($60.00) is all I need or I can do a ice/water layer ($300)
I believe the wetness your referring to is a combination of condensation and side lap moisture, just guessing tho seeing as how I didn't see it in person.If you're bound and determined, use roofing nails. HDD, not those EG felt nails. They'll be brown dust in no time.
I did it once about 11 years ago. http://rcs.si-sv2628.com/show_album_photo.asp?userid=30&AlbumID=288&file=1976&s=0http://rcs.si-sv2628.com/show_album_photo.asp?userid=30&AlbumID=288&file=1976&s=0
I&W shield. Elks, at a 4" exposure, HDD nails. I dutch-lapped the shingles about 6" to 10", random lap widths, so there are NO joints. It's still going strong.
Old School, but the method does work.
You should also note that shingles today are NOT waterproof. Just water resistant. I've seen them leak in the center of a roof on 12/12 pitch. No holes tears, or other damage either. They just absorb water.
The ones in the pictures are undamaged in any way. 8 years old. The amount of water coming through was ruining the house. The pix were taken after a drizzly night.
The problem with low slope shingle roofs is every and any mistake during installation will result in 100's of dollars in damages later, and the later is normally just a few years or sooner.I am going to be roofing a building that has some areas that are 2 in 12 pitch. I am going to be using comp shingles and double felt. Please share any tricks or tips for making this roof water tight.
With out the threat of ice forming and backing up under the shingles the biggest problem would be wind driven rains, in that case the two ply felt may very well be enough.Would the GAF stormguard be comparable to the ice and water shield? It never snow here and the weather in mild
Here you go - from the manufacturer:Would the GAF stormguard be comparable to the ice and water shield? It never snow here and the weather in mild