A prehung door comes already mounted on its frame with hinges attached. It’s ideal for new construction or major remodeling projects, saving time and ensuring proper alignment.
- Measuring tape
- Level
- Shims
- Screwdriver or drill
- Hammer
- Finish nails
- Insulation foam
- Caulk gun
Carefully take out the existing door and frame. Use a pry bar to remove trim and casing. Clean the opening.
The opening should be about ½ inch wider and taller than the prehung unit. Use a level to check the base and sides.
Place the unit into the opening. Confirm the hinge side is plumb using a level.
Insert shims behind the hinges, then fasten the hinge side using screws through the frame and shims into the wall studs.
Swing the door to test for smooth operation. Adjust shims as needed for an even reveal.
Secure the latch side of the frame, keeping even spacing around the door edges.
Use low-expansion spray foam to insulate gaps, then apply caulk to weather-seal edges.
Reinstall or replace the casing, nail it in place, and paint or stain as needed.
- Use sill pan flashing for exterior doors to prevent leaks.
- Apply stainless steel screws for corrosion resistance.
- Don’t over-tighten screws to avoid frame distortion.
- Keep protective film on until the job is done.
Our prehung wood, WPC, and steel doors are factory-assembled, structurally sound, and easy to install — saving time and ensuring quality performance.
Need Help With Installation?
Contact our support team or explore our professional installation service.
FAQs About Prehung Door Installation
- Can I install a prehung door myself?
- Yes. With basic tools and attention to alignment, many DIYers can complete the job.
- Is a prehung door better than a slab door?
- For full-frame replacement, prehung doors save time and reduce alignment issues.