Hanging drywall over plaster is a practical way to update older walls without complete removal. It provides a smooth, modern surface while improving insulation and soundproofing.
If you’re looking for a step-by-step guide to ensure a flawless installation, click here to follow these clear instructions.
Step 1: Gather The Necessary Tools And Materials
Before beginning, ensure you have all the required tools and materials to streamline the installation.
Tools Required
- Tape measure – For precise measurements
- Utility knife – To cut drywall sheets
- Power drill – For driving screws into studs or furring strips
- Stud finder – To locate existing wall studs
- Drywall saw – For cutting openings for outlets or switches
- T-square or straight edge – To make clean, straight cuts
- Putty knife – For applying joint compound
Materials Needed
- Drywall sheets (10mm or 13mm thick)
- Drywall screws (32mm for direct attachment, 38mm+ for furring strips)
- Furring strips (if needed) – To level uneven plaster
- Joint tape – Mesh or paper tape for sealing seams
- Joint compound – To cover joints and screws
- Construction adhesive – Provides additional support
- Sandpaper – To smooth out the compound before painting
Step 2: Inspect And Prepare The Plaster Wall
Checking For Damage
- Examine the plaster for cracks, loose areas, or moisture damage.
- Remove any crumbling or weak sections to ensure a stable base.
- Fill small cracks with patching compound and allow it to dry completely.
Cleaning The Surface
- Wipe down the plaster to remove dust, dirt, or grease that may affect adhesion.
- If using adhesive, ensure the wall is dry and free of moisture.
Step 3: Locate And Mark The Studs
Using A Stud Finder
- Run a stud finder along the plaster wall to locate existing wooden studs.
- Mark each stud with a pencil every 400mm or 600mm, depending on spacing.
- Double-check by tapping the wall—solid areas indicate stud locations.
Confirming Stud Alignment
- If studs are misaligned or inconsistent, installing furring strips will be necessary.
- Ensure marks remain visible as a guide when securing drywall.
Step 4: Install Furring Strips (If Needed)
If the plaster surface is uneven or damaged, furring strips create a stable base for drywall.
Attaching The Strips
- Use timber furring strips (25mm thick) and screw them into wall studs.
- Position them vertically at every stud location for proper drywall support.
- Ensure strips are evenly spaced and aligned for a flat surface.
Benefits Of Furring Strips
- Creates a level surface for drywall.
- Allows space for electrical wiring adjustments if needed.
- Provides room for additional insulation in older homes.
Step 5: Measure And Cut The Drywall Sheets
Taking Accurate Measurements
- Measure the wall dimensions and mark drywall sheets accordingly.
- Allow a small gap (3mm-5mm) at the edges to prevent buckling due to expansion.
Cutting The Drywall
- Use a T-square and utility knife to score the front paper layer.
- Snap the sheet along the scored line and cut through the backing paper.
- For power points and switches, use a drywall saw to make openings.
Step 6: Attach The Drywall Sheets
Applying Adhesive (Optional)
- For additional security, apply construction adhesive to studs or furring strips before fastening.
- This helps reduce screw popping and improves wall stability.
Securing Drywall With Screws
- Position the first drywall sheet at the top corner of the wall.
- Drive drywall screws into studs or furring strips every 300mm-400mm.
- Ensure screws are slightly below the surface without breaking the paper layer.
- Continue attaching sheets tightly against each other to minimise gaps.
Step 7: Tape And Apply Joint Compound
Applying Joint Tape
- Cover all seams between drywall sheets with joint tape.
- If using paper tape, press it into a thin layer of joint compound.
- If using mesh tape, apply it directly to seams before adding compound.
First Layer Of Joint Compound
- Apply the first coat of joint compound over the taped seams using a putty knife.
- Feather the edges to blend smoothly with the drywall surface.
Additional Coats And Sanding
- Allow the first layer to dry completely (typically 24 hours).
- Apply two more coats, sanding lightly between applications.
- Use fine-grit sandpaper for a smooth finish before painting.
Step 8: Sand And Prepare For Painting
Final Sanding
- After the final coat of compound has dried, sand the wall for a seamless finish.
- Remove dust with a damp cloth or vacuum.
Priming The Surface
- Apply a drywall primer before painting to seal the surface.
- This step ensures even paint application and prevents absorption issues.
Step 9: Clean Up And Inspect The Work
Removing Debris
- Dispose of drywall scraps and excess joint compound properly.
- Vacuum the area to remove dust and ensure a clean workspace.
Checking For Imperfections
- Inspect seams, screw holes, and edges for uneven spots.
- If necessary, apply touch-up compound and sand again for a perfect finish.
Step 10: Paint And Finish The Wall
Choosing The Right Paint
- Use a high-quality interior wall paint for durability.
- Consider a matt or low-sheen finish for a modern look.
Painting Process
- Apply at least two coats for complete coverage.
- Allow each coat to dry before applying the next layer.
- Use a roller for large areas and a brush for corners and edges.
Conclusion
Hanging drywall over plaster is an effective way to refresh old walls without removing existing plaster. By following these clear, step-by-step instructions, you can achieve a professional-quality finish with minimal complications whether you’re tackling the job yourself or working with a professional, proper preparation and attention to detail ensure the best results.
Frequently Asked Questions
What Thickness Drywall Should I Use Over Plaster?
Most commonly, 10mm or 13mm thick drywall is used over plaster. Thicker sheets provide added durability and insulation, especially when mounted over battens.
Do I Need To Remove The Loose Plaster Before Installing The Dryer?
Yes, loose or crumbling plaster should be removed or repaired before installation. This ensures the drywall has a stable and even surface to attach to, reducing future issues.
Can I Hang Heavy Items On Drywall Installed Over Plaster?
Yes, but it’s essential to anchor heavy items directly into wall studs or use specialised wall anchors rated for the load. Drywall alone cannot support significant weight.