The short answer
Measure and Cut Plywood Panels
Start by measuring the width and height of each window opening, from the outside edges of the frame. Add 8 inches to both dimensions so the panel overlaps the frame by 4 inches on each side. Write the window location on the panel with a marker, such as 'living room front' or 'bedroom left'.
Use 5/8-inch exterior-grade plywood, which holds screws better than thinner sheets. Cut the panels with a circular saw, and pre-drill pilot holes for screws every 12 inches along the edges. A local hardware store can cut plywood to size if you bring your measurements.
Install Anchors and Backing Blocks
For each window, attach 2x4 lumber backing blocks to the wall above and below the opening, or to the sides, so the plywood has a solid surface to bite into. Use galvanized screws or bolts that go through the siding into the framing. These blocks also keep the panel from flexing in high winds.
If you prefer not to drill into your siding, you can use pre-installed concrete anchors or masonry bolts on brick or stucco. For a temporary setup, drive screws through the plywood into the blocks, then remove them after the storm. Keep the blocks in place for future use.
- Use 2x4 lumber cut to the width of the window frame.
- Place blocks above and below, not just at the corners.
- Choose galvanized screws that resist rust from rain.
- Pre-drill holes to avoid splitting the plywood.
- Mark each panel clearly for its exact window.
Secure Panels with Screws
Position the plywood panel over the window opening, aligning the pre-drilled holes with the backing blocks. Drive 3-inch galvanized screws through the panel into the blocks, starting at the corners and working toward the middle. Tighten each screw firmly, but avoid over-tightening, which can strip the wood.
For extra strength, add a second row of screws near the center of the panel. If you install from outside, use a ladder and have someone hold the panel steady. For second-story windows, consider installing from inside with long screws that reach the exterior blocks.
Consider Permanent Storm Shutters
Plywood is a solid choice for a single storm, but permanent storm shutters or impact-resistant windows offer more convenience. Shutters can be closed quickly and often last for years, while plywood panels need storage space and time to install. Check local building codes, as some areas require specific materials for storm protection.
If you are preparing for a storm in a region with high winds, or if you rent, ask your landlord about approved shutter systems. The pros can install shutters or reinforce existing windows, but you can manage plywood on your own.
Prepare for Water Damage After the Storm
Even with boarded windows, wind-driven rain can find its way into your home, leading to wet drywall, flooring, or belongings. After the storm passes, check for water stains, damp spots, or pooling water near windows and doors. Act quickly to dry the area and remove soaked materials to prevent mold growth.
If water gets in, local water damage pros can help with extraction and drying. They use equipment to dehumidify and dry structural spaces, and they can inspect for hidden moisture. For minor issues, you can start by opening windows, running fans, and wiping down surfaces.
- Look for water stains on ceilings and walls.
- Check window sills and frames for dampness.
- Remove wet carpet or padding within 24 hours.
- Use fans and dehumidifiers to speed drying.
- Document damage with photos for your records.
Talk to someone now
Phones are answered 24/7 for Redmond and nearby communities.
Call Now (425) 407-5186Frequently asked questions
What type of plywood should I use for boarding windows?
Use 5/8-inch exterior-grade plywood, which is thick enough to resist wind and debris. Thinner sheets, like 1/2-inch, can bend or crack. Exterior-grade plywood is treated to handle moisture without warping.
How long does it take to board up windows?
For a typical home with 10 to 15 windows, expect to spend 2 to 4 hours if you have pre-cut panels and all tools ready. Measuring and cutting add extra time. Work with a helper to speed up the process.
Can I board windows from inside the house?
Yes, for windows on upper floors or where outside access is unsafe. Use long screws that reach through the panel into exterior framing. This method is less secure than outside installation, but it can work for temporary protection.