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Happy Holidays and thanks for taking this question.
My roof slope is on the lower end but not quite considered a low slope.
I am in central North Carolina.
My questions are.
Is there an underlayment that can get wet and not damage the decking? I want to install the metal roof myself with my electrician's helper but would like to do the installation for about 2 - hours a day only after work. I used to do metal roofing about 35 years ago and feel comfortable on a roof especially first floor, low slope.
Is it okay to install the metal roof over a damp underlayment?
What is the most reliable type of metal roof? I am nervous about installing the ones where the screws are in the path of the water. I would prefer something where the screws are on the ridges. That type of installation has its downside also. My favorite is standing seam but it is out of my price range.
Thanks and be safe.
As far as screw placement on exposed fastener panels, you will find different recommendations from different manufacturers. Always adhere to manufacturer recommendations. Many, though, do now recommend fasteners go in the flats of the panels, not the ribs. As far as underlayments, there are many premium synthetic underlayments available today and they generally do not absorb water.
Thanks for the great info Todd. How do you suppose the manufacturers make a screw that does not leak? It seems to me that rubber screw gaskets baking in the hot sun are bound to start leaking some day. Would it be prudent for me to encapsulate each gasket in something like 100% silicone after each screw is screwed in?
Happy holidays to you.
It is not unusual for the screws to have to be re-fastened after about 7 years from what I have seen, and then often replaced at about year 12 - 15 with a larger diameter screw. That may not be everyone's experience but it's what I often hear. There are higher quality screws than others -- usually you get what you pay for. I have seen people cover the screws with sealant but I have never seen any definitive proof whether that helps. It's not real pretty though, that's for sure. Happy Holidays!
That doesn't sound too difficult to do with my first floor low slope roof. If I decide to install solar panels some day are they compatible with this type of roof?
I would verify with the manufacturer of the panel you install but, yes, there should be options for mounting solar brackets.
As I am in Florida, I wish to know if the metal which looks like a Spanish tile is problematic or inferior in any way to flat metal. Secondly, I'd like to know what the wind rating is for each. Third, I'd also like to know the estimated retail value for both. Lastly, which metal roofing material(s) offer the highest 180 mph wind rating
Some of the metal tiles have exposed fasteners. Some do not. I think that most of the manufacturers of metal tile also produce standing seam and should be able to compare and contrast the panels for you. Overall, though, you should find similar uplift ratings and warranties. As far as specific warranties, that information would come from the individual manufacturers. While 180 mph sounds good, keep in mind that most structures are shifting at lower speeds and if the structure shifts that will void the roof warranty in all likelihood.
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