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-   -   Waterproof underlayment (http://www.diychatroom.com/f9/waterproof-underlayment-97629/)

twinAK 03-07-2011 10:44 PM

Waterproof underlayment
 
I'm putting the roof on the house this spring and was wondering if anybody could recommend a waterproof underlayment that could stand up to the weather for an extended period. Reason why I'm asking is I might not have enough cash to shingle the 3100 sq ft of roof until the following spring and was considering wintering over one season with a waterproof membrane. I considered Gracie Ice & Water membrane but that's pretty expensive. What about Gracie Triflex or Feltex? Any input would be appreciated.

Tim

1985gt 03-08-2011 09:04 AM

I wouldnt leave any felt or ice and water shield exposed for a whole year. If you can hold of save your money and put the roof on when you can do the whole thing.

seeyou 03-08-2011 09:47 AM

Most synthetic underlayments have an open time of 6 months.

CookeCarpentry 03-08-2011 11:41 AM

I use GAF/ELK deck armor. I think it has an open time of 120 days.

Must be installed with cap fasteners, not slap staples.

I would certainly not trust it over an Alaskan winter.

waterman1971 03-08-2011 11:57 AM

Some people on the upper Texas coast still have the blue FEMA tarps on the roof from hurricane Ike(9/13/2008) Ask me how i know.

Roofmaster417 03-08-2011 10:46 PM

Quote:

Originally Posted by waterman1971 (Post 605241)
Some people on the upper Texas coast still have the blue FEMA tarps on the roof from hurricane Ike(9/13/2008) Ask me how i know.

O.k the suspense is killing me.................How do you know? 1st.Can I have 3 guesses?


1.)You have a family member who still has this on the roof?

2.)You saw them while traveling.?

3.)You saw it on the news?

For the poster with the question about underlayment,I would not take that chance.But its your house.

twinAK 03-08-2011 11:30 PM

All,
Thanks for the advice, I was weary of the idea and figured I would sanity check it against some experience roofers. We're trying to minimize the funds required to make a section of the house livable by the end of summer. Guess I'll have to get creative and come up with some extra cash and just shingle it all this summer/fall.

Tim

waterman1971 03-09-2011 07:48 AM

Quote:

Originally Posted by Roofmaster417 (Post 605719)
O.k the suspense is killing me.................How do you know? 1st.Can I have 3 guesses?


1.)You have a family member who still has this on the roof?

2.)You saw them while traveling.?

3.)You saw it on the news?

For the poster with the question about underlayment,I would not take that chance.But its your house.

All I need do is drive a short distance across town to cast my eyes upon such squalor.

lucknow 03-10-2011 10:39 PM

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.

waterman1971 03-11-2011 12:00 PM

Quote:

Originally Posted by lucknow (Post 607091)
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?

Just sayin!


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