Remove Old Door & Frame
Carefully take out the old door, trim and frame using a pry bar and utility knife.
INSTALLATION GUIDE
How to install a prehung exterior door.
This general guide covers the basic tools and sequence for removing an existing door, preparing the opening, setting the new unit, insulating and sealing it.
Tools & materials
Inspect and Prepare Rough Opening
Check for damage or rot. The opening should be square and 1/2" to 3/4" wider than the new door frame.
Apply Flashing and Caulk
Add flashing tape along the sill and apply a generous bead of exterior caulk where the new threshold will sit.
Insert the New Door Frame
Tilt the door unit into place, centering it in the opening. Rest the bottom on the sill caulk.
Level and Shim the Door
Use a level to ensure the door is plumb and square. Shim behind hinges and the latch side until evenly spaced.
Secure the Frame
Fasten the door frame through the shims using screws or nails, starting with the hinge side. Check for even reveals.
Test the Door Operation
Open and close the door to ensure it swings smoothly and seals properly against the weatherstrip.
Insulate Around the Frame
Fill gaps around the frame with low-expansion spray foam or fiberglass insulation.
Seal and Finish
Apply caulk along exterior joints and paint or stain the door as needed.
General installation guidance: Conditions vary by opening, structure and local requirements. Follow the instructions applicable to the specific product and installation.
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