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How to Install a Regal Patio Door

Prepare the opening

Allow for clearance of at least 1/4" on either side of rough opening and 1/2" above the head jamb.
Make sure the floor is level.
Before you set the door in the opening, apply a high grade sealant in two parallel strips along the length of the sub-floor from one side of the opening to the other. Also run a 3/16" bead of sealant (formulated to the vinyl) around the perimeter of the rough opening.

Installing the Door

Remove all packaging material from the door.
With the operable sash removed set the bottom of the doorframe onto the sill plate and gently tilt it until the nailing flange is secured against the sheathing. Make sure the doorframe is properly centered.
Insert a temporary screw through the nail fin at the top of the doorframe to hold the door in place.
Make sure that the door frame is level and that the side jambs are plumb and square.
Place three sets of wood shims along each side of the door frame between the jamb and the rough opening. Align at least one shim with the strike plate on the latch side of the jamb. Secure the door frame into the rough opening making certain to maintain square and level.
Check again for level and square installation.
Set operating panel into the door frame and make necessary adjustments to rollers to maintain equal height and smooth operation of the operable sash.
Close the door panel and adjust the shims to maintain uniform spacing between the operable sash and the door frame all the way up and down the jamb. Also check that the operating clearance between the door panel and the head frame is uniform. Adjust with shims or adjust the panel rollers if necessary.
Remove the temporary keeper screws and replace with the 3" screws provided making certain to screw into the wood framework of the rough opening.
Fasten the door with an adequate number of nails around the exterior nailing flange (nail every 12"). Cover the nailing flange with a building wrap tape to insure air and water tightness.
Insulate between frame and rough opening with fiberglass insulation. DO NOT USE EXPANDING FOAM!
Proceed with interior and exterior finish.