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Introduction #
Installing the frame for bi-fold or bypass doors in an 8'0" opening is a task that requires precision and attention to detail. These types of doors are commonly used in closets and other areas where space is at a premium. The frame installation is a critical step in ensuring that the doors function smoothly and look professional. In new construction or tract-job environments, speed and consistency are key, but not at the expense of quality. This guide covers the frame only - once it's set, head to our guides on installing bi-fold doors or installing bypass doors for hanging the doors themselves.
The single most important concept in installing door frames for bi-fold or bypass doors is ensuring that the frame is plumb and square. Any deviation can lead to operational issues with the doors, such as binding or failing to close properly. A professional finish carpenter knows that taking the time to get the frame right will save time and prevent callbacks later.
Which guide do I need?
- Bypass sliding doors, full install: How to Install Bypass Doors
- Bypass finish install from a finished opening: How to Finish a Bypass Door Install
- Bifold folding doors, full install: How to Install Bifold Doors
- 6 foot 8 inch opening, track, guides and hanging: How to Install a 6'8" Bi-Fold or Bypass Door Frame
- 8 foot opening, rough frame only: this guide
- 6 foot 8 inch door slabs, hanging and fixes: How to Install 6'8" Bi-Fold or Bypass Door Slabs
- 8 foot door slabs, bifold or bypass: How to Install 8'0" Bi-Fold or Bypass Door Slabs
Before You Begin #
Before you install the door frame, confirm that the following prerequisites are complete.
Prerequisites #
- Drywall finished and painted
- Flooring installed (if applicable)
- Rough framing inspected and approved
What You Need To Know #
When you install the door frame, understanding these core techniques will save you time and prevent callbacks.
- Ensure the rough opening is 2 inches wider and 1 inch taller than the door frame
- Verify that the floor is level; shim as necessary
- Check that the jamb legs are plumb and the header is level
Tools #
- Level - for ensuring plumb and level installations
- Hammer or nail gun - for securing the frame
- Measuring tape - for accurate measurements
- Shims - for adjusting the frame to be plumb and level
- Drill/driver - for installing screws or hardware
Materials #
- 8'0" door frame kit - typically includes jambs and header
- Shims - for adjustments
- Finishing nails or screws - for securing the frame
- Wood glue - optional, for added stability
Installation Steps #
Step 1. Prepare the Rough Opening #
Ensure the rough opening is clean and free of debris. Check that it is the correct size, typically 2 inches wider and 1 inch taller than the door frame.
- Remove any obstructions or uneven surfaces
- Confirm the opening is plumb and level
Step 2. Assemble the Frame #
Assemble the frame components, ensuring the joints are tight and the frame is square.
- Use wood glue at joints for added stability
- Clamp the frame together while the glue sets, if using glue
Step 3. Position the Frame #
Place the assembled frame into the rough opening, using shims to adjust for plumb and level.
- Check alignment with a level
- Adjust shims as necessary to achieve perfect plumb and level
Step 4. Secure the Frame #
Once the frame is aligned, secure it to the rough opening using finishing nails or screws.
- Start with the top corners, then secure the sides
- Ensure nails or screws do not protrude
Step 5. Install the Header #
Install the header, ensuring it is level and securely fastened to the jambs.
- Use a level to confirm alignment
- Secure with nails or screws
Step 6. Final Adjustments #
Make final adjustments with shims to ensure the frame is perfectly plumb and level.
- Check the alignment of the jambs and header
- Trim excess shim material
Pro Tips #
Pro Tip: "Hang bypass slabs, install guides, install cups."
Pro Tip: "Hang bifolds, install knobs."
Pro Tip: Use a 2 1/4 inch hole saw for bypass cups to ensure proper fit in predrilled holes.
Common Mistakes #
- Mistake: Frame not plumb or level - This can cause the doors to bind or not close properly. Always check with a level and adjust shims as needed.
- Mistake: Incorrect rough opening size - Ensure the rough opening is 2 inches wider and 1 inch taller than the frame.
- Mistake: Not securing the frame properly - Use enough nails or screws to ensure the frame is stable.
QC / Punch Checklist #
- Verify the frame is plumb and level
- Ensure all fasteners are flush and secure
- Check that the frame is square and fits the rough opening properly
- Confirm that all shims are trimmed and the frame is stable
