May a layer of shingles be installed over another layer of shingles?
Only once. If there is more than one layer on the structure, the existing roofing must be pealed off and the deck re-felted before the new shingles are installed.

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1. When is a building permit required?
2. How long does it take to get a permit?
3. When don't I need a permit?
4. Are Building Permits required for above ground swimming pools?
5. What are the fencing requirements for swimming pools?
6. Who can obtain an electrical, plumbing, mechanical-heating and air-permits?
7. How do I obtain an electrician's license?
8. Do I need a Building Permit for a detached portable storage building, carport, deck, or detached garage?
9. Sprinkler Systems / Irrigation?
10. How long does it take to get a permit for repairs, replacement on electrical, plumbing, heating and air, or sign services?
11. May Building Permits be obtained by mail?
12. Who is allowed service work in Texarkana, Texas?
13. May I do electrical, plumbing, or heating and air work on my house, currently being built?
14. May I fax a copy of my current State Licenses and proof of insurance to your office?
15. Do I need a permit to pour a concrete slab?
16. Do I need a permit for a new roof, as well as roof repairs, overlay, and shingles? Do I need a permit for siding?
17. Are permits required to replace windows or doors?
18. May a layer of shingles be installed over another layer of shingles?
19. May plastic pipe be used in water lines within buildings?
20. Are permits required for fences, and what are the height restrictions?
21. How do I obtain a Certificate of Occupancy on a commercial building, and how long does it take?