New Build Walls – What You Need to Know Before You Start

Thinking about putting up walls in a brand‑new home? You don’t have to be an architect to get it right. The key is to pick the right system, understand the basics of insulation and fire safety, and follow a simple step‑by‑step plan. Below you’ll find straightforward advice that works whether you’re DIY‑ing a small partition or overseeing a full‑house build.

Pick the Right Material for Your Walls

Most new homes use timber stud walls because they’re light, cheap and easy to modify. A typical stud wall consists of vertical studs (usually 45 mm wide) spaced 400 mm apart, covered with plasterboard on both sides. If you need extra strength or fire resistance, you can switch to steel studs or add a layer of fire‑rated board.

Insulation is the next big decision. For energy efficiency, fill the cavity between studs with mineral wool or rigid foam. Mineral wool is cheap and does a great job at sound reduction, while rigid foam offers higher R‑values in a thinner profile. Remember to leave a small gap at the top for a vapour barrier – that keeps moisture from getting trapped inside.

How to Install and Finish Your New Build Walls

Start by marking the wall line on the floor and ceiling. Use a laser level or string line to keep everything straight. Then fix the bottom and top plates to the floor and ceiling joists with proper fixings – screws for timber, bolts for steel. Once the plates are secure, insert the studs and nail or screw them to the plates.

After the frame is up, run electrical cables and plumbing if needed, making sure to use approved clamps and keep a safe distance from the studs. Next, cover the frame with plasterboard, screwing it into the studs every 200 mm. Tape and joint the seams, then skim coat for a smooth finish.

Finally, sand, prime and paint or wallpaper. If you’re installing a garage door nearby, double‑check the wall spacing around the opening to keep the door’s weight balanced and the track level.

Common mistakes to avoid: forgetting the vapour barrier, using the wrong spacing for studs, and skipping a moisture‑resistant board in bathrooms or kitchens. A quick double‑check before you seal the wall can save you weeks of re‑work.

Whether you’re a first‑time homeowner or a seasoned DIYer, these steps keep new build walls sturdy, insulated and ready for the next stage of your project. Got a specific question? Drop a comment and we’ll help you troubleshoot the detail that’s tripping you up.