Dry lining a wall, also known as drywalling or plasterboarding, is a method of covering interior walls with plasterboard sheets to create a smooth, paintable surface. Here's a step-by-step guide:
Steps to Dry Line a Wall:
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Prepare the Wall:
- Clean the Surface: Ensure the existing wall is clean and free from loose debris, dust, and grease.
- PVA Application (Optional but Recommended): Apply a coat of PVA adhesive (Polyvinyl Acetate) to the brick or plastered wall. This helps the bonding adhesive adhere properly. Follow the PVA manufacturer's instructions for dilution and application.
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Measure and Cut Plasterboard:
- Measure the Wall: Accurately measure the height and width of the wall you want to dry line.
- Cut the Plasterboard: Using a utility knife and a straight edge, score the plasterboard along the measured lines. Snap the board along the score. Cut the paper backing on the opposite side to separate the piece completely. Always cut slightly smaller than the measured space to allow for adjustments.
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Mark Adhesive Points:
- Mark Board Length on Wall: Measure the length of the plasterboard sheets and mark corresponding points on the wall. This will serve as a guide for adhesive placement.
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Mix and Apply Adhesive:
- Mix the Adhesive: Prepare the drywall adhesive (also known as dot and dab adhesive) according to the manufacturer's instructions.
- Apply Adhesive Blobs (Dabs): Apply blobs or dabs of the adhesive to the wall, spacing them evenly. A common pattern is to create vertical lines of dabs approximately 400-600mm apart, with dabs also positioned near the edges of where the plasterboard will sit. Dabs should be large enough to allow for adjustment but not so large that they squish out excessively.
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Attach the Plasterboard:
- Position the Board: Carefully lift and position the cut plasterboard sheet against the wall, aligning it with the marked points.
- Press and Plumb: Press the board firmly against the adhesive dabs. Use a spirit level to ensure the board is plumb (vertically straight). You can gently tap the board with a rubber mallet to adjust its position and ensure it's level and aligned.
- Secure (Optional): For added security, especially on ceilings or uneven walls, use drywall screws to temporarily hold the board in place while the adhesive dries.
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Fill Joints and Finish:
- Allow Adhesive to Dry: Let the adhesive dry completely according to the manufacturer's instructions (usually 24-48 hours).
- Tape the Joints: Apply drywall joint tape (paper or mesh) over the seams between the plasterboard sheets.
- Apply Joint Compound (Mud): Apply multiple thin coats of drywall joint compound (also known as mud) over the tape, feathering the edges to create a smooth, seamless surface. Allow each coat to dry before applying the next. Sand lightly between coats for a smoother finish.
- Final Sanding: Once the final coat is dry, sand the entire surface smooth with fine-grit sandpaper.
- Prime and Paint: Apply a coat of drywall primer and then paint the wall with your desired paint color.
