
Michael Jones
New member
I have nearly completed the first layer of a multi-layer wall system for the EXTERIOR of my studio.
The construction is staggered stud, and the sheathing consists of the following:
1.) 1/2" OSB
2.) 1/2" R-MATE (This is an insulative material made of compressed fiberglass insulation. One side is reflective, and the other side is not. This material is required by LOCAL building and energy codes where the finished outside walls will be either brick or stone.)
3.) Tyvek House wrap.
4.) 1/2" wood siding
5.) Brick
The brick extends half way up on all sides except the front, and there it extends all the way up.
Because brick is required to have "weep holes" along the bottom course, I don't expect it to have an added benefit in STC ratings. It is there purely for asthetic reasons.
So getting back to the first layer; the OSB:
I am ready to caulk the joints and have chosen the caulk I intend to use. It is an elastomeric latex sealant with a tested 50 year durability guarantee.
It meets the specifications of ASTM C-920, Class 25.
A search for this specification yeilded only sites in which you have to pay for the actual specification document.
So given that, does anyone have access to ASTM documents, and if so, does this caulk prove adequate for studio construction?
The construction is staggered stud, and the sheathing consists of the following:
1.) 1/2" OSB
2.) 1/2" R-MATE (This is an insulative material made of compressed fiberglass insulation. One side is reflective, and the other side is not. This material is required by LOCAL building and energy codes where the finished outside walls will be either brick or stone.)
3.) Tyvek House wrap.
4.) 1/2" wood siding
5.) Brick
The brick extends half way up on all sides except the front, and there it extends all the way up.
Because brick is required to have "weep holes" along the bottom course, I don't expect it to have an added benefit in STC ratings. It is there purely for asthetic reasons.
So getting back to the first layer; the OSB:
I am ready to caulk the joints and have chosen the caulk I intend to use. It is an elastomeric latex sealant with a tested 50 year durability guarantee.
It meets the specifications of ASTM C-920, Class 25.
A search for this specification yeilded only sites in which you have to pay for the actual specification document.
So given that, does anyone have access to ASTM documents, and if so, does this caulk prove adequate for studio construction?