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Publication #ABE376

Protect with Plywood1

Hal S. Knowles III, Kathleen C. Ruppert, Karla A. Lenfesty, Barbara Haldeman, and Craig Miller2

This publication is part 3 of 6 in the Education + Action = Wind Damage Mitigation series. For the rest of the series, visit http://edis.ifas.ufl.edu/topic_series_wind_damage_mitigation.

Proper storm protection requires time and money. But if you don’t have the time to hire a commercial contractor or you need to keep costs low, properly installed plywood shutters can provide reasonable protection for your house.

Because of the temporary nature of plywood shutters, the panel weight, and the installation labor required, we recommend using them as a last resort. See the second publication in this series, Install Window Shutters (http://edis.ifas.ufl.edu/ae411), to review other options.

Figure 1. 

Plywood is strongest in the direction of its wood grain.


Credit:

Institute for Business & Home Safety


[Click thumbnail to enlarge.]

Are All Plywood Shutters the Same?

No. There are many ways to install plywood shutters. However, we suggest you use one of two main methods. We recommend using barrel bolt plywood shutters for concrete block homes with windows inset two or more inches from the exterior wall. Overlapping plywood shutters are best for windows inset less than two inches.

Barrel Bolt Plywood Shutters

Needed Materials

  • Minimum 7/16-inch-thick plywood (3/4-inch is recommended.)

  • 3- or 4-inch barrel bolts

  • Drill

  • Circular saw

Figure 2. 

Basic Installation Directions

Cut the plywood to fit snugly in each window indentation. Connect multiple sheets with 2 × 4s or sturdy hinges for large openings. Screw barrel bolts to each plywood shutter, using one bolt for every 12 inches of vertical plywood. Mark the locations for bolt holes in the wall. Label each panel with “Top” and “Bottom” and the window it fits. Drill the holes. Plug the holes when not in use.

Overlapping Plywood Shutters

Needed Materials

• Minimum 7/16-inch-thick plywood (3/4-inch is recommended)

  • Nails (less secure) or screws/bolts (more secure) at least 2 inches long

  • Lead or stainless-steel sleeve wall anchors (do not use plastic)

  • Hammer (for nails) and/or drill (for screws)

  • Wood shims (if necessary)

  • Circular saw

Figure 3. 

Basic Installation Directions

Cut the plywood to overlap each window opening by 4 inches or more. Connect multiple sheets with 2 × 4s or sturdy hinges for large openings. Drill matching holes through the plywood and the wall. Label each panel with “Top” and “Bottom” and the window it fits. Hammer sleeve anchors into wall holes. Screw (or bolt) the plywood into the anchors. Plug the holes when not in use.

Additional Issues to Consider

Avoid Oriented Strand Board

It takes 30% thicker oriented strand board (OSB) to equal the impact strength of plywood. We recommend using plywood.

Plan Ahead

Plywood is cheap, convenient, and available at most hardware stores. However, buy your plywood before a storm approaches. Your local hardware store may run out if you wait until the last minute.

Store Properly

Plywood requires proper storage to prevent wood damage. Florida's hot, humid climate can warp or degrade plywood, making the shutter unusable. It is best to waterproof your plywood shutters with a sealant or paint, and store them in a cool, dry place. Keep the shutter hardware (the bolts and screws) in a labeled container with the shutters. Storing plywood flat may also help prevent warping. Never store wet plywood.

Watch Out for Termites

Choose a storage location that keeps the plywood shutters off the ground. This helps reduce the potential for termite damage.

Label the Shutters

Most homes have a variety of window types and sizes. Clearly mark each of your plywood shutters so you know which window it fits and which side is up. You may consider making a drawing of your house and marking each window on it with a special number to match your shutter labels.

For more detailed, Florida-specific guidelines on a variety of plywood shutter designs, visit the APA (Engineered Wood Association) website.

Other Resources

APA – The Engineered Wood Association: Publications. Use “hurricane shutters” as a search term, or type “T460” into the search box on the page to download a free copy of the association’s 2009 publication Hurricane Shutter Design Considerations for Florida. (Registration may be required; there is no cost to register.) http://www.apawood.org/level_b.cfm?content=pub_main

National Oceanographic and Atmospheric Administration (NOAA), Atlantic Oceanographic and Meteorological Laboratory (AOML): Plywood Hurricane Shutters: http://www.aoml.noaa.gov/hrd/shutters/index2.html

Footnotes

1.

This document is ABE376, one of a series of the Department of Agricultural and Biological Engineering, UF/IFAS Extension. It is Part 3 of 6 in the Education + Action = Wind Damage Mitigation series. This publication is partially funded from a Florida Department of Community Affairs Residential Construction Mitigation Program Grant. Original publication date: November 2005. Latest revision: October 2013. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Hal S. Knowles III, research associate, Program for Resource Efficient Communities; Kathleen C. Ruppert, Extension scientist, Program for Resource Efficient Communities; Karla A. Lenfesty, family and consumer sciences agent, UF/IFAS Extension St. Lucie County; Barbara Haldeman, editorial assistant, Program for Resource Efficient Communities; Craig Miller, associate-in, Program for Resource Efficient Communities; UF/IFAS Extension, Gainesville, FL 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.