SJ-Chris:
SJ-Chris wrote:
I was thinking of using this stuff:
https://www.homedepot.com/p/SAVOGRAN-1-qt-Liquid-TSP-Substitute-Cleaner-10632/205491255
And then rinsing with a pressure washer.
----You're instincts are right on with the TSP. It is the recommended cleaner. Be careful, however, with a pressure washer as the intensity can damage the membrane. I applied the TSP with a soft bristle brush broom made for vehicles and rinsed it after attaching my hose to the broom extension wand. I'm sorry I don't have any photos.
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Question: Did you first use something like Dicor Lap Sealant over all of the existing sealed spots (ie. vents, front/rear edge, etc)? Or does the Henry's act as a good enough sealant over all those spots? I imagine edging with a paint brush over all those "trim" spots with 2-3 heavy coats during the process, and 2 overall coats everywhere else.
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Again, your instincts are right. You can use the Dicor or the Henry 884 for those areas that are gouged or originally insufficiently sealed from the factory (uh huh!) Otherwise, rolling or brushing on the 887 should be adequate too since both Henry products are 100% silicone and seal well. Just be sure you adequately clean the build-up of black dirt and environmental residue to get a good bond. This is where it took me the most time. On the previously sealed areas and around the perimeter I had to use a firmer brush and lots of elbow grease to remove the black layer of schmutz.
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My roof doesn't seem to have any issues with leaking/etc. As mentioned in a previous post, I'm mostly doing this as a preventative measure (the RV is 5 years old) and also I'm putting up solar and kinda figure now is a good time to do it while I don't have 2-3 panels up there yet. Once done with reseal and solar, hopefully I won't have much need to go up on my roof for a few years (except for perhaps an annual cleaning).
-Chris
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My roof was also in very good shape, the aforementioned ponding issue actually common and not necessarily problematic. Otherwise, an annual maintenance check for tree limb gouges is wise and should be about the only reason you'd need to put a ladder up there. I'll let the rain and snow otherwise rinse my roof for me!
