How to Screen Under a Deck

Decks often have a lot of horizontal space beneath them.

Usually, this space is difficult to use and can be a problem with children and animals crawling under the deck. This type of environment has exposed nails and screws, and it may harbor spiders which can injure children. Screening off the underside of a deck will make a deck look more attractive and provide for safety issues.

Measure, mark and cut using a table saw the treated 2-inch by 4-inch boards to fit between the deck posts at 2 inches above grade or immediately above your concrete piers (if your deck uses above grade piers).

Screw the 2-inch by 4-inch boards into the deck posts using deck screws. You may need to drill pilot holes for some types of wood. Your framing should align with the deck framing. Check for level. These boards will provide additional framing when you install your screen.

Measure, mark and cut the 2-inch by 4-inch treated boards to fit vertically between your posts if your posts are more than 4-feet apart. Divide the space between the posts evenly to locate your support stud. Screw it into the bottom rail and deck using decking screws.

Cut heavy duty shade cloth to fit between your 1-inch by 4-inch boards and your framing if you also need to protect your home from wasp nests or other insects. Simply staple the cloth in place until you screw your boards in position.

Cut the 1-inch by 4-inch treated boards to fit the deck and grade when mounted vertically. Allow 3/8-inch between boards for expansion. Check each board for level and screw the screening boards directly into the deck framing and the new framing boards using decking screws. By mounting the boards vertically you will be able to shape the bottom edge of the individual boards to match the grade, eliminating any odd holes in the screening.

Things You Will Need

  • Tape measure
  • Straight edge
  • Pencil
  • Treated 2-inch by 4-inch boards
  • Table saw
  • Power screw driver
  • Deck screws
  • Level
  • Drill (optional)
  • Treated 1-inch by 4-inch boards
  • Shade cloth
  • Shears
  • Staple gun


  • Seal your screening every two to three years when you seal your deck. Other materials can be used as screening, such as lattice or non-wood products.

About the Author

F.R.R. Mallory has been published since 1996, writing books, short stories, articles and essays. She has worked as an architect, restored cars, designed clothing, renovated homes and makes crafts. She is a graduate of the University of California at Berkeley with bachelor's degrees in psychology and English. Her fiction short story "Black Ice" recently won a National Space Society contest.