โJul-10-2020 07:45 AM
โJul-11-2020 11:21 AM
DrewE wrote:Gdetrailer wrote:
You do realize "EXTERIOR GRADE" plywood simply means it is another name for BC grade plywood? BC grade is very rough texture on both sides with one side being lightly sanded.
Exterior grade plywood glue is not moisture resistant, get it wet or damp and it WILL eventually come apart, to get moisture resistant glue you have to MARINE GRADE and that is not sold in big box stores.
Everything I've read has said that exterior grade plywood means it uses waterproof glues, while interior plywood uses merely moisture-resistant glues. That's the main differentiator. Exterior plywood can come in many different face grades (as can interior plywood), though BCX is the most readily available one. Plain BC plywood (as opposed to BCX) is not exterior grade; that's what the X indicates.
Marine plywood is a higher grade for sure, and costs correspondingly more.
โJul-11-2020 09:43 AM
Gdetrailer wrote:
You do realize "EXTERIOR GRADE" plywood simply means it is another name for BC grade plywood? BC grade is very rough texture on both sides with one side being lightly sanded.
Exterior grade plywood glue is not moisture resistant, get it wet or damp and it WILL eventually come apart, to get moisture resistant glue you have to MARINE GRADE and that is not sold in big box stores.
โJul-11-2020 09:19 AM
Lantley wrote:
I have never seen exterior grade luan.I'm not saying it doesn't exist. But what I have seen in the big box stores is interior grade.
โJul-11-2020 08:09 AM
โJul-11-2020 08:04 AM
โJul-11-2020 07:54 AM
theoldwizard1 wrote:Gdetrailer wrote:
forgo the 7/16 single sheet of plywood and instead use two thinner sheets of plywood laminated in place. Thinner sheets will bend and conform much easier than one thick piece and will be far stronger, faster and safer than sawing a lot of relief cuts to the underside of the plywood.
Not sure why I didn't think of this, but it is much easier. Might cost a few $$$ more, but it will save a lot of grief.
โJul-11-2020 03:36 AM
theoldwizard1 wrote:
For that thickness of plywood, I would kerf the back side with a circular saw about 1 ply deep. It will take several kerfs about 2"-4" apart. Fasten the flat end down and SLOWLY apply pressure to bend it.
โJul-11-2020 02:44 AM
Gdetrailer wrote:
forgo the 7/16 single sheet of plywood and instead use two thinner sheets of plywood laminated in place. Thinner sheets will bend and conform much easier than one thick piece and will be far stronger, faster and safer than sawing a lot of relief cuts to the underside of the plywood.
โJul-10-2020 03:08 PM
โJul-10-2020 01:01 PM
โJul-10-2020 12:12 PM
theoldwizard1 wrote:
For that thickness of plywood, I would kerf the back side with a circular saw about 1 ply deep. It will take several kerfs about 2"-4" apart. Fasten the flat end down and SLOWLY apply pressure to bend it.
โJul-10-2020 10:30 AM
theoldwizard1 wrote:
For that thickness of plywood, I would kerf the back side with a circular saw about 1 ply deep. It will take several kerfs about 2"-4" apart. Fasten the flat end down and SLOWLY apply pressure to bend it.
โJul-10-2020 08:28 AM
โJul-10-2020 08:09 AM