Guest User
7/6/2005
I can see daylight between steel residentual panels on my flatroof converted to gabled pitched. What sealant or double sided tape (be specific) should i use to "watertight" the panels? There is no substructure ie plywood or OSB, just 2x4's and 2x6's. Steel is 26 gauge.
Todd Miller
Isaiah Industries, Inc.
7/6/2005
I am not sure where you're seeing the daylight. I am concerned that there may be more at issue here than just a need for sealant. Are the panels not fitted together properly? Does there need to be flashing put in place? Also, are you certain that the panels you installed are approved by their manufacturer for installation over lathe instead of solid decking? As far as sealants that are normally used with metal roofing ... whether it is a tape or a caulk sealant, I suggest a butyl rubber product.
gary beckler
0
7/7/2005
The daylight is seen running the length (24 feet) of the panels. The panels are simply overlapped, side by side,running the length of the roof. Rubber washer screws are used to secure the panels to the subframe,i.e 2x4"s every 4 feet of the 24 foot steel panels,hince, 12 screws per panel.The panels are simple 2inch ribbed , 26 gauge steel. THat's it. Nothing fancy, nothing to "flash". Just row after row of steel panels held down by screws. Daylight is seen between the panels where they overlap. Are there a few NameBRAND sealants you can suggest that are waterproof and flxible to "seal" the panels together and make them watertight????? thanks,gary
Todd Miller
Isaiah Industries, Inc.
7/7/2005
I am a little surprised that so much daylight is showing at the overlapped seams. Something seems amiss here. Have you contacted the manufacturer of the roofing and made this inquiry with them. I think something may be wrong either with the panels themselves or with the way or manner in which they were installed. Have screws been put through the overlapped seams? Sikaflex makes the majority of the butyl tapes which are used in this industry. It sounds to me like the panels, at the very least, need to be removed, have tape put in place, and then re-installed. Your metal roofing supplier will be able to provide these tapes. I do not believe they are available at home centers / lumber yards. As for caulk sealants, NPC Sealants makes a product called Solar Shield which is a terpolymer butyl caulk. Again, I do not know that it is available to the public. If you do resort to looking at a home center, look for a butyl based sealant. I do not know what specific brands they may sell. I am assuming your roofing has a quality Kynar finish. The butyls adhere well to it. Keep in mind, though, these products are sealants, not adhesives. They will not "hold" things together nor will they bridge well over open gaps. I hope this helps. Again, though, please contact the manufacturer of your roofing to try to figure out what has gone wrong here.
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