A broken window leaves more than a mess. It can expose your home, shop or workplace to weather, theft, pests and further damage within minutes. Knowing how to board windows properly can make the area safer until replacement glass is installed, but the job needs to be done carefully. A poorly fitted board can damage the frame, create a new hazard or give a false sense of security.
For a small break in a low-risk area, temporary boarding may be manageable. For a smashed shopfront, large glass door, upper-level window, safety glass panel or anything exposed to the public, arrange an emergency glazier as soon as possible. Securing the opening is only the first job. Restoring safe, suitable glass is what gets the property properly back in use.
First, make the broken window area safe
Do not start measuring or handling timber while loose glass is still falling from the frame. Keep children, tenants, customers and pets away from the area, especially if the break is near an entry, footpath or common area. If the glass is part of a door, balustrade or large panel, block access to that section entirely.
Put on enclosed shoes, cut-resistant gloves, long sleeves and safety glasses. Carefully remove loose pieces that are easy to reach, placing them straight into a sturdy container. Do not press on cracked glass or try to pull out fragments that are held tightly in the frame. Tempered safety glass can continue to break apart unexpectedly, while broken ordinary glass often has sharp, unstable edges.
Sweep the immediate area, then check further out than you think necessary. Small shards can travel across carpet, tiles and concrete. A vacuum is useful once larger pieces are removed, but use it only after checking for sharp fragments that could damage the machine.
If there is any risk around electrical fittings, alarm sensors, a damaged frame, or a large unstable pane, stop there. Keep the area isolated and get a professional to make it safe.
What you need for a temporary window board-up
The right material depends on the size and location of the opening. Exterior-grade structural plywood is generally the practical choice because it is stronger and more weather-resistant than thin interior board. For a small residential opening, plywood around 12 mm thick is often suitable. Larger openings, exposed shopfronts and vulnerable ground-floor areas may need thicker material or a more secure professional board-up system.
Avoid using particleboard, MDF, thin hardboard, cardboard or a loose sheet of corrugated plastic as an external security measure. These materials absorb moisture, break down quickly and are easy to force through. They may keep a little rain out for a short period, but they are not reliable protection.
You will usually need a tape measure, pencil, circular saw or handsaw, drill, suitable screws, washers, timber battens if required, and a tarp or plastic sheeting for short-term weather protection. Use screws rather than nails. Screws hold better, are less likely to split timber and can be removed without causing as much damage when replacement glass is ready to go in.
The fixing method matters just as much as the plywood. Where possible, fix into solid timber framing or a suitable structural section of the window surround, not into thin aluminium, brittle render or the remaining glass. Aluminium commercial frames and older timber windows can be damaged easily, so if you are unsure where the secure fixing points are, it is better not to guess.
Measure beyond the exposed opening
Measure the full opening at its widest and tallest points. Then allow enough extra plywood to overlap onto solid surrounding material, usually at least 75 mm on each side where the frame and wall construction allow it. The board needs to bridge the opening securely, not sit inside it like a loose plug.
Check for handles, louvres, security screens, awnings and uneven brickwork before cutting. A board that looks right on the ground can fail to sit flat once it is lifted into position. If rain is expected, plan the top edge so water sheds away from the opening rather than running behind the board.
How to board windows securely
Once the area is clear and the board is cut, hold the plywood in place and mark the screw locations. Use enough fixings to keep the board flush and stable, with screws spaced around the perimeter rather than concentrated in only a few spots. Large boards may also need a central fixing or bracing to prevent bowing and rattling in wind.
Pre-drill the plywood to reduce splitting. Place washers under screw heads where useful to spread the load, particularly near board edges. Drive screws firmly into the solid fixing area, but do not overtighten them to the point that the board cracks or the frame is distorted.
For openings where you cannot safely screw into the outside surround, such as some aluminium-framed windows, an internal batten system may be possible. This uses timber battens inside the opening to clamp the plywood in place. It can work well in the right situation, but it must be fitted securely and should not be treated as a substitute for an emergency repair in a public-facing or high-security area.
If the window is above ground level, do not lean out, balance on ledges or attempt the job from an unsafe ladder position. The risk of a fall is far greater than the benefit of a quick DIY cover. Ground-level access is one thing. High windows, stairwells, atriums and multi-storey buildings need the right access equipment and experienced hands.
Seal only when weather requires it
A properly overlapped board will stop much of the rain, but wind-driven weather can still find gaps. If wet conditions are expected, run exterior-grade tape or weatherproof flashing tape along the top edge and upper sides after the board is fixed. Do not rely on tape as the main support.
Plastic sheeting can help keep dust and light rain out from the inside, but it is not a security barrier. It can also flap, tear and trap moisture if left in place for too long. Treat it as a short-term layer only.
When a temporary board-up is not enough
Boarding is useful for buying time, not for restoring a window to a safe, compliant condition. In Queensland, glass used in doors, low-level windows, shopfronts and other risk areas may need specific safety glass. Replacing it with the wrong type of pane can create a serious injury risk and may not meet building requirements.
Call for urgent professional help rather than attempting a board-up yourself when the damage involves:
- a shopfront, glass door or entry exposed to customers and the public
- large panes, toughened glass, laminated glass or glass near a balustrade
- a school, strata common area, rental property or managed commercial site
- an upper-storey opening or a location requiring ladders, lifts or traffic control
- damaged aluminium framing, locks, door hardware or security systems
These situations need more than a piece of plywood. They may require safe glass removal, correct replacement glass, frame assessment, secure temporary protection and a thorough clean-up before the space can reopen.
For businesses, speed is often the deciding factor. A boarded shopfront can protect the premises overnight, but it also affects presentation, natural light and customer confidence. The sooner the correct replacement is measured and fitted, the sooner staff and customers can use the space normally again.
Keep the board-up temporary and check it daily
After fitting the board, check it from both sides if safe to do so. It should not move when pressed lightly, leave sharp edges exposed or create a gap someone could reach through. Keep the opening dry inside, move valuables away from the damaged area and photograph the damage for your insurer or property manager before further work changes the scene.
Inspect the board after heavy rain or strong winds. Plywood can swell, fixings can loosen and water can enter around an uneven edge. If the board has become soft, warped or loose, it needs attention straight away.
Do not leave a temporary board in place longer than necessary. Apart from security and weather concerns, it can hide water damage, make ventilation difficult and delay the proper repair. A fast glass replacement is usually the cleaner, safer outcome for homes, rentals and commercial properties.
If the damage is on the Gold Coast and you need the opening secured and restored without drawn-out delays, Nerang Glass Service can handle the board-up, glass replacement and clean-up. The practical goal is simple: make the site safe now, then get the right glass back in place so you can get on with your day.
