Install 1 2 inch plywood to sheath the exterior of the garage door opening.
How to build a wall with a garage door opening.
Add siding to match existing house materials on the outside of the new wall.
Nail 2x4s together to form l s and use them to temporarily hold the gable end trusses upright.
Simply nail a 1 x 1 x 4 piece of pine to each end stud and run the string to each end.
This lumber will be used to attach your garage door track and a portion of your assembly.
Cover plywood sheets with a protective house wrap material before adding any type of siding.
Cut two 2 x 6 pieces of lumber and attach to the face of the wall running from the edge of your garage door jambs to the ceiling of your garage.
Install a couple of blocks to keep the bottom of the truss from sliding off the top of the wall.
As you place each garage wall framing structure into position you want to first make sure it is in a straight line before you secure your bracing.
Cut the top and bottom plates to the measured length of the new wall.
You do this with a string line run along the top plate out from the edge of the plate about 1 2.
Header requirement 2 at minimum the header should be 12 wide with doubled 2 4 at opening and ceiling running the width of the door with a 2 4 in the center of the opening for the center bracket to attach to.
Calculate the placement for any door opening and cut the jack and cripple studs to length.
Lay out the truss locations on the plates spacing them every 2 ft.
Doubled 2 4 s at minimum should be at each edge of the garage door to allow for the mounting of the tracks and jamb brackets.
Headers should be a minimum of 12 wide.