How to plasterboard a doorway

View the video

How to plasterboard a doorway

View the video

Project Overview

Learn how to plasterboard over the space left when a doorway is removed from a room. We show you how to build and install a frame for the space. You’ll see how to cut and install new plasterboard. You’ll also find out how to use base and top coats of plaster to create a smooth wall.
Continue to step-by-step instructions

Step by Step Instructions

1 Install a timber frame for the doorway
2 Cut and install the new plasterboard
3 Fill the joins and apply plaster base coat
4 Apply your top coat and sand
  • Step 1. Install a timber frame for the doorway

    Measure the existing doorway space. Then cut your timber to size for the frame. Lay the timber piece out on the floor and nail the frame together. Stand the frame up, position it inside the doorway and nail it in place. In this case, because this doorway is over 800mm, we placed an extra stud in the middle to stop the plasterboard warping. Put some packer timber around the edges of the new frame so the new plasterboard will sit flush with the old plaster.

  • Step 2. Cut and install the new plasterboard

    Measure around the edges of the existing plasterboard and transfer these to a new sheet of plasterboard. Use a utility knife to cut the plasterboard to the right size. Now apply walnut sized amounts of plaster glue to the centre stud, spacing them about 300mm apart. Put the new plasterboard in place and nail it to the frame.

  • Step 3. Fill the joins and apply plaster base coat

    Mix some plaster base coat to fill the joins around the edge of the old door. Scrape back the wall, fill the joins with base coat and let it dry. Scrape the wall back again, then apply the tape along the joins. The tape helps to strengthen the joins and stops them from cracking. Now apply a layer of basecoat over the tape. Once dry, scrape it back again and add a second layer of base coat.
  • Step 4. Apply your top coat and sand

    Use a flat trowel to apply the plaster topcoat. Trowel on either side of the join to make it wider and to flatten out any imperfections on the wall. When applying top coat, it’s always handy to put it on thick and then scrape it back. This will give you a nice flat finish and make it easier to sand off. 

diy chalkboard cabinet hanging in the garage 01:27

Shelving & Storage D.I.Y. upcycled chalkboard cabinet We take an old cabinet and upcycle it into a handy chalkboard cabinet that will give you somewhere to store tools and a place to write lists or plans for your next project.

honeycomb wall shelves 02:23

Shelving & Storage How to make D.I.Y. honeycomb floating wall shelves These honeycomb floating wall shelves are a modern and stylish way to make a feature of any wall in your house. They’re easy to make and they’ll give a somewhere to show off your favourite things.

bathroom rejuvination 01:44

Ideas & Makeovers Learn how to give your bathroom a makeover on a budget Simple and affordable ways to give your tired bathroom a makeover.

roses in garden

Planting & Growing Winter garden ideas It may be cold outside in most parts of New Zealand but there are still a few things that need to be done in the garden at this time of the year. But if you can’t face going outside, you can always bring your garden inside suggests Bunnings horticul...

diy wood and concrete kitchen island 05:43

Outdoor Living D.I.Y. wood and concrete kitchen island You’d be surprised how easy it is to make this wooden and concrete kitchen island from just a few simple tools and materials.

Modern living room DIY makeover 01:29

Living Room How to give your living room a modern D.I.Y. makeover There are a few simple ways to freshen up a tired living room and make it a real feature in your home. You can create more space by knocking out a wall and updating the furnishings to fit. By adding floating cabinetry and open shelves, you’ll have m...

black diy wooden sofa arm table 02:49

Living Room D.I.Y. wooden sofa arm table A sofa arm table is a great addition if you’re short on space or don’t have a coffee table in your living area.

hampton kitchen

Ideas & Makeovers Hamptons sanctuary Bright, open and stylish are the hallmarks of the Hamptons Sanctuary. The island bench doubles as a workspace and breakfast bar, while the bamboo benchtops and window panel cupboards complete the look.

Top of the content