Roof felt?

Old 10-21-02, 12:50 PM
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Roof felt?

Please excuse the simplicity of this question.

A few years back I built a small garden shed about 10x8. I put shingles right on top of the felt. To date I have had no leaks or roofing issues. To be honest, I didn't even know about felt.

Now I am about to cover a new 8x8 section of roofing that extends out from the house over a patio (a 'shed' roof). Do I need to put felt down? Does felt simply act as an additional water barrier or does it have an additional purpose?

The felt seems to come in big rolls that would last me a lifetime. Is there some other common material I could use for an 8x8 surface to put under the shingles or should I bite the bullet and buy one of those giant rolls?
Old 10-21-02, 01:29 PM
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Roofing felt is primarily to prevent damage to the roof sheathing and framing if the shingles leak or get blown off.
I would use it. It isn't expensive. 15-lb or 30-lb. (Obviously, you get twice as much sq. ft. with the 15-lb roll.)
Good luck!

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