How to Soundproof a Backyard
The world is a noisy place. Inside of your home, you can totally soundproof each room to make it as quiet as possible. Your backyard is a different matter. Unless you build a large addition onto your home to totally enclose the backyard, it can never be completely soundproof. There are, however, steps you can take to cut down noise from the outside world while also keeping your noises confined to the backyard.
Dig a hole at your fence line 12 inches wide and 3 feet deep with your shovel. Slide a post into the hole. Pour concrete mix into the hole and add water. Stir the concrete with your shovel. Hold the level against each side of the post and maneuver the wood to make it perfectly plumb. Install a new post every 10 feet along the length of the fence line. Allow 24 hours or the concrete to cure before continuing.
Hold a 2-by-4 up between two posts. Lay the board flat with each end resting against the side of a post. Move the board so that it is 3 inches off of the ground. Secure the board to the posts by driving two 16d nails at an angle through each end of the 2-by-4 with your hammer. Mount another post 3 inches from the tops of the posts. Continue connecting the posts with a 2-by-4 treated board between each set of posts. Place the level on top of each 2-by-4 board to be sure it is level before nailing it to the posts.
Attach the 1-by-6 treated boards vertically to one side of the 2-by-4 boards with 6d galvanized nails. Use the level to be sure each 1-by-6 board is plumb. Leave 1/8 inch of space between each 1-by-6 to give the wood room to expand and contract with age and the weather. Apply a bead of caulk into every gap between the 1-by-6 boards. Caulk the seam between the 1-by-6 and 2-by-4 boards.
Unroll the R19 insulation. Hold a piece of insulation against the back of the 1-by-6 boards. Use your staple gun to fasten the insulation in place. Cover the entire length of the fence with insulation. Cut the insulation as necessary with your razor knife.
Cover the inside edge of the 2-by-4 boards with 1-by-6 treated boards. Leave a 1/8-inch gap between the boards. Caulk the gaps between the 1-by-6 boards. Caulk the seams between the 1-by-6 and 2-by-4 boards.
Dig a hole and plant a box hedge every 3 feet along the length of your fence. Plant the hedges deep enough to cover the roots. Water the hedges thoroughly with your hose when they are all installed. Add water to each hedge every evening at sunset for six weeks to give the hedges time to root and begin to grow.
Things You Will Need
- Treated posts, 4 inches by 4 inches by 12 feet
- Treated boards, 2 inches by 4 inches by 10 feet
- Concrete mix
- Water hose
- 16d galvanized nails
- Tape measure
- Caulk gun with 30-year silicone
- R19 insulation
- Staple gun
- Razor knife
- Treated boards, 1 inch by 6 inches by 8 feet
- 6d galvanized nails
- Box hedges
- Work gloves
- Safety glasses
- Dust mask
- Work gloves and safety glasses should be worn when using hand tools.
- A dust mask should be worn when working with insulation.