Doors structure problem...

hugo_inside · Post by **hugo_inside** » Thu Sep 01, 2005 6:13 pm

The separation wall of my studio wil be made by 2 sheet rock 15 mm + 40 mm rockwool 70 kg/m3 and 50 mm air space and then 40 mm rock wool and 30 mm sheet rock.

But installing the door the installer want to do a better installation reinforcing the one of this walls with another sheet rock in the middle.

So the wall will be 2x15 mm sheetrock / 40 mm rock wool / 1x15 mm sheetrock/ 50 mm air gap / 40 mm rock wool / 2x15 mm sheetrock

what happens with this inner sheet rock?? is worse on isolation terms

cyeazel · Post by **cyeazel** » Fri Sep 02, 2005 9:21 am

If I'm understanding your post correctly then the extra layer of sheetrock will create a 3 leaf wall which will worsen your low end isolation.

hugo_inside · Post by **hugo_inside** » Fri Sep 02, 2005 11:13 pm

but if I don't use the inner leaf in all the wall?? only in the door place??

knightfly · Post by **knightfly** » Sun Sep 04, 2005 3:24 pm

The "weakest link" theory applies - if part of your wall is weaker, you may as well make ALL the wall weaker.

Can you post some sort of sketch of what you're doing? Maybe there's a way to fix it that's better for isolation... Steve

hugo_inside · Post by **hugo_inside** » Mon Sep 05, 2005 2:04 am

2 pics of the door:

knightfly · Post by **knightfly** » Mon Sep 05, 2005 6:02 am

I'm adding up your dimensions, and come up with about 200mm total thickness; not seeing that in the pix. Can you add a drawing or explain more where your man want's to put a third leaf? Thanks... Steve

hugo_inside · Post by **hugo_inside** » Mon Sep 05, 2005 10:13 pm

this is the draw of the double wall:

In the picture there is only one wall with the door, but there will be another wall with another door.

hugo_inside · Post by **hugo_inside** » Wed Sep 07, 2005 9:47 pm

the 2nd wall is made... I hope I'll have no problems... the inner layer is not installed...