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What Materials Are Used for Emergency Board-Up?

Last updated October 26, 2026

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The short answer

Plywood Is the Main Choice

The most common material for emergency board-up is plywood, specifically 3/4-inch CDX grade. CDX stands for C-D exposure, meaning it has a smooth side and a rougher side, and it is designed to handle some moisture. This thickness provides a solid barrier against wind, rain, and debris, while still being manageable for a few people to handle.

Thinner plywood, like 1/2-inch, may be used for smaller windows or when weight is a concern, but it offers less protection. The pros typically select the thickest plywood that can be securely fastened to the opening. The plywood is cut to cover the entire opening, with a slight overlap beyond the edges to ensure a tight fit.

Screws and Fasteners

Screws are the preferred fasteners for board-up because they hold more securely than nails and are easier to remove later. The pros use exterior-grade screws, often coated to resist rust, and they drive them into the surrounding frame or masonry. For wood frames, screws go directly into the studs or window casing. For brick or concrete, masonry anchors or lag shields are used.

The length of the screws depends on the material. For wood, screws need to penetrate at least 1.5 inches into the frame. For masonry, the anchor must be set properly to hold the plywood firmly. Using the right fastener prevents the board from being pulled off easily and reduces damage to the opening.

Additional Framing and Adhesives

Sometimes the opening is too large or the frame is damaged, so extra support is needed. In those cases, the pros may add 2x4 lumber as horizontal or vertical bracing behind the plywood. This creates a stronger structure that can resist heavy winds or attempts to pry the board open.

Construction adhesive is occasionally applied to the back of the plywood to create a stronger bond, especially on smooth surfaces like metal or glass. However, adhesive makes removal more difficult, so it is used sparingly. The pros balance security with the need to eventually replace the window or door without extra damage.

  • 3/4-inch CDX plywood for most openings
  • Exterior-grade screws with rust-resistant coating
  • Masonry anchors for brick or concrete frames
  • 2x4 lumber for bracing large or damaged areas
  • Construction adhesive for extra hold on smooth surfaces
  • Heavy-duty plastic sheeting as a temporary moisture barrier

Why Material Choice Matters

The right materials make the difference between a board-up that lasts through a storm and one that fails quickly. Plywood that is too thin can flex and crack, letting in water or intruders. Fasteners that are too short or the wrong type can pull out under pressure. Using the correct materials helps protect your home until permanent repairs can be made.

The pros also consider the weather. If rain is expected, they may add a layer of plastic sheeting between the plywood and the opening to keep moisture out. This is especially important for broken windows or doors where water can easily seep in and cause further damage to floors and walls.

What to Expect During Board-Up

When the pros reach your home, they first assess the damage and measure the openings that need to be covered. They then cut the plywood on site to fit each opening precisely. The boards are installed with screws, and any gaps are sealed with additional materials if needed.

The process usually takes a few hours, depending on the number of openings and the complexity of the job. After the board-up is complete, the pros will explain what was done and what steps you might need to take next, such as contacting your insurance company. Remember, your safety is the priority, and a secure board-up helps you avoid further issues like water damage or theft.

  • Measure each opening before cutting
  • Cut plywood to overlap the frame slightly
  • Drive screws into solid framing or anchors
  • Add plastic sheeting if rain is expected
  • Check that boards are secure and level
  • Discuss next steps for permanent repairs

Water damage does not wait

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Frequently asked questions

How long does a board-up last?

A well-installed board-up can last for several weeks or even months, depending on the weather and the condition of the materials. Plywood that is exposed to heavy rain or sun may degrade faster. The pros typically recommend getting permanent repairs done as soon as possible to avoid further damage.

Can I board up my own windows?

You can attempt to do it yourself, but proper installation requires the right materials and technique to be effective. If the opening is large or the frame is damaged, a DIY job may not hold. The pros have the experience and tools to secure your home quickly and safely.

Will my insurance pay for board-up?

Policies vary, and your insurer decides what is covered. Many homeowners policies include coverage for emergency repairs like board-up if the damage is from a covered event, such as a storm. Check your policy and contact your insurance company to understand your coverage and any documentation they may require.

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