The short answer
Gather the Right Tools and Materials
You will need a few specific items for a secure job. Essential tools include a tape measure, a drill with screwdriver bits, and a saw if you must cut the board. Materials consist of exterior-grade plywood at least half an inch thick, exterior wood screws that are at least two inches long, and a sturdy ladder. Having everything ready before you start makes the process safer and faster.
Clear the Area and Measure Carefully
Start by carefully removing any loose glass fragments from the window frame. Use a broom and dustpan from the inside, pushing debris outward. Be extremely cautious, as glass can be hidden in sill tracks. If the window has a sash, you may need to remove it entirely to create a flat surface for the board. Clear the ground outside where you will place your ladder.
Next, measure the window opening accurately. Measure the height and width of the rough opening in the frame. Add at least four inches to each dimension; this provides a two-inch overlap on all sides for a secure fit. Write these measurements on the plywood sheet. A precise measurement ensures your board will completely cover the opening and block the elements.
Cut and Position the Plywood Board
Cut the plywood to your measured size using a circular saw or have it cut at the hardware store. A clean, straight cut is important for a good seal. If you are cutting it yourself, support the plywood on sawhorses to ensure a stable and safe cutting surface. Double-check the board's fit by holding it up to the window from the outside before securing it.
With a helper if possible, position the board over the window opening from the outside. Center it so the overlap is even on all sides. The board should sit flat against the exterior wall. Have your helper hold it steady while you prepare to drill. This step is much easier with two people, especially for larger windows on upper floors.
- Wear your gloves and safety glasses at all times during this step.
- Ensure the ladder is on stable, level ground before climbing.
- Check that no electrical wires or plumbing are behind the drilling points.
- Pre-drill screw holes in the plywood to prevent the wood from splitting.
- Start with a screw in the top center to help hold the board in place.
- Have all screws and your drill within easy reach on the ladder.
Secure the Board to the Structure
Drive screws through the plywood and into the solid wood of the window frame. If the frame is damaged, you must anchor into the wall studs surrounding the window. Place screws every eight to twelve inches around the perimeter of the board. Do not skimp on screws; a strong wind can pry a loosely fastened board loose. Ensure each screw is tightened firmly so the board cannot rattle.
Check the seal from the inside after installation. You should see no gaps where light or air can pass through. If you find gaps, you can use a strip of foam backer rod or duct tape on the inside as a temporary seal. The primary goal is to create a weather-tight barrier. In a humid subtropical climate with hot humid summers and a Gulf hurricane season, this keeps humidity and rain from entering your home.
When to Seek Professional Help
Boarding up is a temporary fix. The underlying cause of the break, like a storm or accident, may have caused hidden water damage inside your walls. If the broken window resulted from a plumbing leak or storm flood, moisture may have seeped into framing or insulation. This moisture can lead to mold growth and structural rot if not addressed properly by a restoration expert.
Local water damage pros have tools to detect hidden moisture you cannot see. They can dry out wall cavities and subfloors to prevent long-term problems. If you live in Katy, consider this step after a major storm. A temporary board protects the opening, but a professional inspection ensures your home is truly secure and dry. This prevents more costly repairs later.
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Call Now (832) 979-5241Frequently asked questions
What if the window frame is rotten or damaged?
If the frame is too soft to hold screws, you must anchor the plywood into the solid wall studs beside the window. Use longer screws designed for masonry if drilling into brick. The board must be secure, so finding solid wood or masonry is critical for a safe, temporary seal.
Can I use nails instead of screws?
It is not recommended. Screws provide a much stronger, more reliable hold, especially in high winds. Nails can work loose over time, allowing the board to pull away. Exterior wood screws are a better choice for this temporary but important repair job.
How long can I leave a boarded-up window?
A plywood board is a short-term solution for days or a few weeks. Schedule a permanent window replacement promptly. Prolonged use can stress the fasteners and may not meet local building codes. It also leaves your home vulnerable if the seal eventually fails.