Shingles over shingles

Old 01-01-10, 05:21 AM
Thread Starter
Join Date: Dec 2004
Location: South Florida
Posts: 1,125
Upvotes: 0
Received 1 Upvote on 1 Post
Shingles over shingles

My understanding is that Florida code allows up to 3 layers of shingles. Since there's an adhesive involved near the bottom of the shingles, I'm trying to understand how this makes sense. If the bottom layer (including the adhesive) has worn out, how does it make sense to glue something on top of it?

Opinions on applying shingles over old shingles?
Old 01-02-10, 06:32 AM
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,265
Upvotes: 0
Received 0 Upvotes on 0 Posts
Most places are abandoning that code. That's why you are having trouble understanding how it makes sense. It's recommended that you remove the existing layer.
Old 01-02-10, 07:28 AM
Join Date: Feb 2006
Location: USA
Posts: 6,394
Received 63 Upvotes on 55 Posts

If it were my roof, I would want to know the condition of the sheathing. A complete tear off is necessary to verify the integrity of the sheathing.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: