Last minute opinions on second layer of roof attachment

[EPGregg]

Last minute opinions on the best way to attach the second layer of 1/8th inch Baltic birch roof.

I’m getting ready to apply the second layer of 1/8th inch Baltic birch to the outside of my tear. Before I jump in I thought I’d ask for any last minute advice. I am leaning toward using polyurethane construction adhesive and possibly using gorilla glue for the edges to make sure there is a good seal. I plan on using straps, 20 lb. bags of sand, clamps, braces and anything else I can think of to make sure I get good contact.

I will eventually seal everything with CPES and Spar varnish, (unless I mess up and end up painting!

Any advice would be appreciated.

Thanks for everything so far!

Gregg

[dan galvin]

gregg polly is a great product and the cost woulf be way way cheeper then
gorilla glue. if you can use ratchett straps 2x4 and sand bags that will work great i just finished mine that way
dan

[halfdome, Danny]

I apply two layers of 1/8" Baltic Birch plywood followed with aluminum. I apply Tightbond ll glue with a plastic Bondo spreader on the whole first layer. I then lay the second corse of full sheets over the first layers joints. I use a narrow crown stapler (1/4" wide) with 1/2" wire staples to hold it down while the glue dries and leave them in place. Some feel one layer will do when covering with aluminum but I like to crawl up on the roof now and then. The two glued layers create a very strong roof shell. If you can staple it all down and Bondo the holes you should be okay. Danny

[2bits]

I second the Titebond and staples method. I used a hammer and trim nails but that's only because I don't have any air tools.

[wannabefree]

Where you live makes a difference. Here in AZ, Titebond skins over in about 5 minutes. One trick I use to lengthen working time is to spray down the glue surfaces with water, then spread the glue. For even more working time I'll thin the glue a bit. Heat is not so much the problem as lack of humidity. With 10% relative humidity common, and wood moisture content in the <6% range the wood will just suck that glue dry in no time.

Good luck and let us know how the glue-up goes. I'm about a month away from doing my roof and I'd love to hear what you learn.

[Steve_Cox]

Last minute opinions on the best way to attach the second layer of 1/8th inch Baltic birch roof.

I’m getting ready to apply the second layer of 1/8th inch Baltic birch to the outside of my tear. Before I jump in I thought I’d ask for any last minute advice. I am leaning toward using polyurethane construction adhesive and possibly using gorilla glue for the edges to make sure there is a good seal. I plan on using straps, 20 lb. bags of sand, clamps, braces and anything else I can think of to make sure I get good contact.

I will eventually seal everything with CPES and Spar varnish, (unless I mess up and end up painting!

Any advice would be appreciated.

Thanks for everything so far!

Gregg

I'd roll on epoxy thickened with adhesive filler to go between the layers of plywood, and with the straps, sandbags, and clamps I wouldn't poke any holes in the surface with staples, screws or nails. My tear drop roof is 1/4" red oak plywood and is held on with just epoxy adhesive.

[EPGregg]

Thanks for the responses. I'll try to let you know how things turn out.

All of a sudden it's WINTER at 8000 feet!

[Roly Nelson]

6 years ago, I stuck the 2nd layer of 1/8 inch lauan to the first layer using common ordinary panel adhesive, liquid nail type of glue. It has held up well and was easy to work with. Good luck
Roly