Flat Roof in San Francisco

Guest User
1/3/2006
To Expert, I recently bought a Home that needs work on the flat roof. Since there were rains these past weeks. There are water leaks in the home. We are planning a replace the whole roof. As they remove the old roof what needed to be replace? the Seam of the roof and some plywood that had been damage by water? We also had a contractor came out and estimate the cost of the new roof and had mentioned to replace it with the Aluminum roof. Something also called 1048 material. Not sure what it is. Please provide me some info on the Aluminum roof. Is this the best Material for flat roof in San Francisco? How much does it run to replace a new roof for about 1700 sq ft area? Thanks for the info.
Todd Miller
Isaiah Industries, Inc.
1/3/2006
Mike, I don't think I can be of much help. The Metal Roofing Alliance is in place to promote "steep pitch" metal roofing -- typically metal products used on 3:12 or greater pitch. What you have is entirely different. 1048 sounds maybe like an aluminum alloy number but I am not sure about that. Could aluminum make a good product for this? Sure, as long as it is properly formed and properly installed. I just don't know much that can help you with this, I'm afraid. I am sorry.
Guest User
1/3/2006
Hi, At least can you give me some input of the repairs. Once they remove the old roof, what needed to be repair prior to installing the new roof. I know there will be damages in certain area because of the recent rains. I can visibly see water leaks thru the interior. It causes some of the interior Sheet Rock wall moist and wet. Two other areas are soak with water. By this explaination, would there be major damages inside the walls? Please give some info on this what is expected needed to fix. Should the Roof Contractor know that these area need to repalce with new plywood? Please let me know thatnks
Todd Miller
Isaiah Industries, Inc.
1/4/2006
You could possibly have rotten decking that needs replaced. If this has not been leaking etrribly long (something which you really won't know for certain until the roof is opened up), I doubt that the deterioration will extend beyond the decking. Once the roof has been replaced and seems to be doing well, you will need to make the interior repairs -- drywall, plaster, etc as needed. Depending upon the amount of water in the walls and ceiling, you may need to remove insulation and replace it. There are also large drying units which can be rbough in to help dry things out. Back to the roof, if you are in San Francisco proper, you may need to have a building permit and then inspections done for a complete roof replacement like this. If code requires this, make sure that your contractor is adhering to it. Also, on the roof, if you choose metal, you will likely need either a "field-seamed" standing seam designed for this low of pitch or else some sort of soldered system. This helps to ensure leakproof joints between the sheets of metal. Make sure you understand fully what the contractor intends to do. Make sure you know who manufactured the products they are using and then contact the manufacturer as necessary for details.
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