The new tubular building will be installed within two weeks. I found a really good deal on 5 inch Styrofoam 4 x 8 sheets.
The plan is to install 1x4 furring strips across the trusses then screw the 5 inch Styrofoam to the furring strips. This will leave me with a 2.5 inch air gap between the Styrofoam and the bottom of the roof.
I know I’ll be losing approximately 7.5” of “head room”, but with 12’ walls, it’s not a issue.
The walls will have a 1.5” furring strip on the metal to create a air gap with a 1” foam board. So my thought process is the ceiling and the walls will be able to breathe from where the corners of the building come together and it vent towards the peak (ridge area) of the building.
Do I have the installer leave me a 1/2” gap at the peak panels or let the panels touch each other? The ridge cap will have foam inserts over the ribs to keep critters out. Not sure if they will allow air to escape?
By installing the Styrofoam panels with this method, will the siding and roof still condensate?
I’ve also considered spray foam, but 2” of closed cell on walls and roof is $7k for a 940 sf building.
I’ve also read about “flash spray” where it’s 1” of closed cell to help with condensation?
Not sure if I’ll add AC/Heat as this will be a work shop and I just want to be comfortable.
Looking at the building from the front….
The right hand side (south side) has 15’ viburnum bushes 8’ away. The back side (East side) is a wooded lot 8’ away. The left side faces North and the front where the garage doors are face west.
Central Florida is home.
Any thoughts or ideas is appreciated.
Pics below show what garage will look like as well as bush height and location on property
The plan is to install 1x4 furring strips across the trusses then screw the 5 inch Styrofoam to the furring strips. This will leave me with a 2.5 inch air gap between the Styrofoam and the bottom of the roof.
I know I’ll be losing approximately 7.5” of “head room”, but with 12’ walls, it’s not a issue.
The walls will have a 1.5” furring strip on the metal to create a air gap with a 1” foam board. So my thought process is the ceiling and the walls will be able to breathe from where the corners of the building come together and it vent towards the peak (ridge area) of the building.
Do I have the installer leave me a 1/2” gap at the peak panels or let the panels touch each other? The ridge cap will have foam inserts over the ribs to keep critters out. Not sure if they will allow air to escape?
By installing the Styrofoam panels with this method, will the siding and roof still condensate?
I’ve also considered spray foam, but 2” of closed cell on walls and roof is $7k for a 940 sf building.
I’ve also read about “flash spray” where it’s 1” of closed cell to help with condensation?
Not sure if I’ll add AC/Heat as this will be a work shop and I just want to be comfortable.
Looking at the building from the front….
The right hand side (south side) has 15’ viburnum bushes 8’ away. The back side (East side) is a wooded lot 8’ away. The left side faces North and the front where the garage doors are face west.
Central Florida is home.
Any thoughts or ideas is appreciated.
Pics below show what garage will look like as well as bush height and location on property
