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666666 · 30th March 2010

Thanks!!!

If you add another layer of sheetrock DIRECTLY to your existing sheetrock (with Green Glue or without), it will NOT be considered another "leaf", but part of the existing leaf.

What I'd recommend... do NOT add another layer of sheetrock, but instead add a layer of 5/8" or 3/4" plywood... with Green Glue between the original sheetrock and new plywood. The plywood will make the installation of your paneling WAY easier as you can now nail anywhere. And 3/4" plywood provides about the same mass as 5/8" sheetrock. By comparison, having to worry about catching studs through two layers of sheetrock will be a headache and you'll need very long nails (especially if your planking is 3/4" thick and you'll be going in at an angle etc.) Yes, plywood is more expensive than sheetrock, but unless your area is tremendous, the extra cost would be well worth it.

And definitely do NOT add Green Glue under your finished planking... it will most definitely ooze out between the seams and cause a major irreparable mess. Once Green Glue gets on any surface, that's the end of it... trust me. That stuff is NASTY. But I do like the idea of adding plywood over the sheetrock with Green Glue in-between, then nailing your finished planking directly to the plywood.

You'll notice in the first of the three photos above, we DID add a layer of 3/8" plywood over the existing sheetrock to make planking installation easier. This was especially important since the planking we used is very thin and we needed to use very small staples to avoid splitting the planking. Such a small staple would not have penetrated the 5/8" sheetrock and 1/2" homasote that is already on the ceiling. So by adding a layer of 3/8" plywood (which is light, but thick enough to hold small staples well), we were now able to use small staples and shoot anywhere. The result was an installation process that was much quicker and easier than it could have been, and a good solid bond.

30th March 2010	#58
666666 Lives for gear Joined: Jan 2005 Location: Long Island, NY Posts: 2,564 Thread Starter	Thanks!!! If you add another layer of sheetrock DIRECTLY to your existing sheetrock (with Green Glue or without), it will NOT be considered another "leaf", but part of the existing leaf. What I'd recommend... do NOT add another layer of sheetrock, but instead add a layer of 5/8" or 3/4" plywood... with Green Glue between the original sheetrock and new plywood. The plywood will make the installation of your paneling WAY easier as you can now nail anywhere. And 3/4" plywood provides about the same mass as 5/8" sheetrock. By comparison, having to worry about catching studs through two layers of sheetrock will be a headache and you'll need very long nails (especially if your planking is 3/4" thick and you'll be going in at an angle etc.) Yes, plywood is more expensive than sheetrock, but unless your area is tremendous, the extra cost would be well worth it. And definitely do NOT add Green Glue under your finished planking... it will most definitely ooze out between the seams and cause a major irreparable mess. Once Green Glue gets on any surface, that's the end of it... trust me. That stuff is NASTY. But I do like the idea of adding plywood over the sheetrock with Green Glue in-between, then nailing your finished planking directly to the plywood. You'll notice in the first of the three photos above, we DID add a layer of 3/8" plywood over the existing sheetrock to make planking installation easier. This was especially important since the planking we used is very thin and we needed to use very small staples to avoid splitting the planking. Such a small staple would not have penetrated the 5/8" sheetrock and 1/2" homasote that is already on the ceiling. So by adding a layer of 3/8" plywood (which is light, but thick enough to hold small staples well), we were now able to use small staples and shoot anywhere. The result was an installation process that was much quicker and easier than it could have been, and a good solid bond.