Cooler attic cooler house.
C attic gable end wall sheathing be made of styrofoam.
The stairs come up to the south gable end with a landing of just 36 from nosing to framing so i don t know if i can get away with deepening the wall in that area.
A house protected by solarbord radiant barrier sheathing has a head start on comfort.
Both can be done poorly of course and i ve seen both done poorly.
And of course a bathroom with a window doesn t require an exhaust vent.
I know not ideal but has to help and make some noticeable difference.
Your house has a gable end if you have a sloped roof with a vertical wall that forms a triangle under the end of the roof.
Here are the three keys to sheathing an attic kneewall properly.
Preparing an attic for insulation.
Cover the whole wall.
For the gable ends i may use both methods mentioned.
This means the rest of the house will be cooler too.
Here is how to insulate an unfinished attic.
This will allow me to rigid foam block the joist ends right up to the knee wall sheathing and seal with dow pro foam.
Install r13 insulation in the rafters on top rafter baffles.
An exhaust vent fan can exhaust out through a gable end side wall or out through a soffit overhang.
Up to 97 of radiant heat from the sun is reflected by solarbord so the attic can be up to 30 cooler.
So companies like norbord started creating tallwall windstorm panels to help alleviate this.
Install r13 in walls and insulate garage door.
In some cases the expected loads will be too high for the gable end frame end wall studs or ceiling diaphragm.
Never step between joists as you may break through the ceiling below make sure there are no uncovered electrical boxes or exposed wirings.
I will extend this roxul to the attic side of the knee wall studs.
I was considering sheathing attic side knee walls with either thermo ply red or xps foam.
3 4 t g osb flooring will cover the floor.
Install gable vents on each end of garage.
I think the rigid material will do a better job with air sealing though and will stay intact longer.
I d prefer to see a rigid material on attic kneewalls figures 8 and 9.
For more information on gable end frame bracing see the following.
However your roofer is correct that bathroom exhaust venting is desirable to avoid indoor moisture problems that can extend to the attic roof sheathing and can affect roof.
But the north wall is ripe for added depth as well as the south wall outside of the landing and perhaps the dormer walls too.
Install rafter baffles in each rafter cavity.
If so the building designer might design a balloon framed end wall which eliminates the need for a gable end truss.
The death of the 8 sheet one of the biggest items when sheathing a wall vertically is that the sheathing has to be continuous 602 10 4 5 which meant that an 8 sheet wouldn t cut it in many places so longer ones were required.
Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve your mobility in the attic.
