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Old 10-24-2012, 10:20 AM   #1
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help installing new skylight!!

Hi, i ordered a new poly skylight on ebay. I just have a few questions with this job i will be doing myself.
1. What is the easiest way to remove the old dicor?
2. What do i use for sealant between the skylight and roof? butyl tape?
3. I was going to buy eternabond tape for covering it, agreed, what size 3in. or 4in??

I was going to put screws every 3 to 4 inches around skylight, any other suggestions?
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Old 10-24-2012, 11:01 AM   #2
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I used a heat gun to soften the Dicor, then a putty knife got it off like cream cheese. Acetone to clean the surface. Check these discussions of skylight caulk to put the new one down, I've not done it so I don't have experience with it. Sealing skylight with dicor

Best caulking to use around........
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Old 10-24-2012, 01:10 PM   #3
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If you have a fiberglass roof, I would remove the old skylight and discard it. Clean the roof area by removing the old sealant and dirt with a heat gun and scraper. I used one of those vibrating blade tools on mine. Screw the new skylight down to the roof every 3 inches with flat head screws countersunk into the skylight. Then clean the skylight and roof with acetone. Then apply Eternabond tape, starting from the rear and working forward. The tape should cover the screws by at least 1 inch and more if possible. The roof should have 2 inches of tape to prevent any moisture from getting under it. The key here is to make sure the Eternabond tape is put down on a solid,clean surface and roll it down to ensure it bonds. I did this on my MH and it has been through some very intense storms with no leaking. When I replace the skylight, I will cut the tape around the skylight and remove the skylight. If I can get the old Eternabond tape off, I will. If not, I will replace the skylight and apply Eternabond tape over the new screws and the old tape. I used 4 " tape the first time and will probably need 6 " next time. I used this tape on all my roof seams and am very impressed with it. I hope this helps.
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Old 10-25-2012, 06:47 AM   #4
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nobody answered my question regarding what kind of sealant goes BETWEEN the skylight and rubber roof? i have read butyl tape??
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Old 10-25-2012, 09:48 AM   #5
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Butyl tape for between the skylight and the opening, then take your choice. Self leveling Butyl caulk seals and allows easier replacement. Eternabond tape will do a nice neat job, probably last longer than the skylight, but it is a bear to remove.
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