Filling in a doorway with plasterboard is a common DIY project that can help reconfigure the space in your home or office. The task involves framing the opening, installing plasterboard, and then finishing the surface to blend seamlessly with the surrounding wall. Here’s a step-by-step guide for filling in a doorway with plasterboard.
Step 1: Prepare the Area
Begin by removing the door and its hardware. Take off any trim or casing from around the doorway to create a clean working surface. Use a pry bar and a hammer to carefully remove these elements without damaging the adjacent walls. If you intend to reuse the trim, be careful not to break it during removal.
Step 2: Frame the Opening
Measure the doorway to determine the size of the frame you’ll need to build. Use 2×4 lumber to create a new frame that fits inside the opening. Once cut to size, secure the vertical studs to the existing door jamb at top and bottom using screws or nails. Depending on the width of the opening, you may need to install additional horizontal crosspieces between studs for added stability.
Step 3: Install Insulation (Optional)
If the wall is exterior or if noise reduction is desired, install insulation in the framing. Cut batt insulation to fit snugly between the studs and press it into place.
Step 4: Measure and Cut Plasterboard
Measure the framed area and cut your plasterboard to size. For a cleaner cut, score the front side of the plasterboard with a utility knife, then snap it along the scored line, and finally, cut the paper backing to complete the separation. It’s always better to measure twice and cut once to avoid mistakes.
Step 5: Attach Plasterboard
Position the plasterboard against the frame and attach it using drywall screws. The screws should be spaced about 16 inches apart and sunk just below the surface of the board without breaking the paper face.
Step 6: Tape and Apply Joint Compound
Cover the seams where the plasterboard edges meet with paper or fiberglass tape. Apply a thin layer of joint compound (drywall mud) over the tape, smoothing it with a drywall knife. Spread joint compound over the screw heads as well and let it dry according to the manufacturer’s instructions.
Step 7: Sand and Finish
Once the joint compound is dry, sand the surface smooth. Be careful not to sand too aggressively to avoid damaging the plasterboard. Apply additional coats of joint compound as needed, allowing each layer to dry and sanding between coats, until the wall surface is smooth and even.
Step 8: Prime and Paint
After achieving a smooth finish, wipe down the wall to remove all dust. Apply a primer designed for drywall to ensure proper paint adhesion. Once the primer is dry, paint the wall to match the surrounding area. You may need to paint the entire wall to ensure the colors blend seamlessly.
Step 9: Reattach Trim (Optional)
If you plan to reattach the original trim or add new trim, measure and cut it to fit the new wall space. Nail the trim in place, fill any nail holes with wood filler, sand lightly, and apply a finish coat of paint or stain to complete the look.
Safety Precautions and Tips
- Always wear safety gear, such as goggles and a dust mask, when cutting plasterboard and sanding joint compound.
- Ensure the frame is level and secure to avoid any issues with the wall surface down the line.
- Consider a moisture-resistant plasterboard for areas subject to high humidity.
- Use a stud finder to locate existing studs for securing the new framing, especially in load-bearing walls.
By following this guide, you should be able to fill in a doorway with plasterboard effectively. Take your time with each step to achieve the best result, and don’t hesitate to consult with a professional if you encounter structural concerns or are unsure about any aspect of the project.