musigenesis
Senior Member
Don't worry, the drawer is only a threat to my DIY toilet.
I have had good luck using 3M brand double stick (foam) tape to attach lexan to various surfaces. It also works well with polycarbonate which otherwise is about impossible to secure. I used 1/2" angle iron along the front and rear edges on my polycarbonate as insurance against wind lift and it has held up for ten years without leaking. If you follow this idea, be sure to pay the bit extra for "real" 3M double stick tape--there is a difference!
Be absolutely sure there is no "oily" or silicone residue on either surface before you apply the tape.
Did an experiment (fortunately) riveting 1/4" Lexan to some plastic from my roof hatch with 3/16" SS rivets.
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Complete fail. I guess the plastic is too soft and the SS deforms through the hole and the piece pulls right out.
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I guess I need to try this with aluminum rivets or just use screws.
A washer on each side, is used to rivet hinges & light brackets to fiberglass on aircraft. The rivet squeezes the two together, pinching the resin & limiting the rivet expansion. Often a backer strip of aluminum or steel on each side. Maybe this would work for you? (With .1910 holes)
I knew aluminum rivets were going to fail but I had to try anyway.
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Drilled the holes for the latch cover.
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Two dabs of construction adhesive and Dynatron-570 (the white stuff!) around the edges to seal it.
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Decided to use 3/4" #12 SS machine screws to attach to the plastic of the hatch. They grip pretty well and a lot easier than riveting anyway.
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Cut the plexiglass to fit around the latch cover and the rounded corners.
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Marked out the screw holes (every 2").
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Lexan is so easy to drill. Love this stuff.
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Ran in two screws to hold it in place and then drilled the rest of the pilot holes in the hatch.
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Bead of Dynatron-570 around the edges. I decided not to use construction adhesive as well as screws since it doesn't really seem to adhere too well to Lexan and I think (hope) the screws will be sufficient.
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All screwed in and glopped up. I got good squeeze-out all around with the edge bead, so I think this thing will be watertight - at least initially. My big concern will be what happens to it after it sits in direct sunlight all day for a long time.
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Looks good from the underside, which is all I care about.
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We're supposed to get some thunderstorms tomorrow night, so I'll install this on the bus tomorrow and see how it does.
I like how it's not visible from the outside that this is anything but an ordinary emergency hatch.
First time since I've owned the bus that nobody can break in without literally breaking something (or picking the MasterLock on the door, I guess).
Great looking skylight! And your interior is really coming along. You are making great progress!
Looking great! Hope it holds up during the thunderstorm test!!
Great progress! The entertainment keeps coming.