How do I Build an Attached Barn Shelter?

Preparation

• 1

  Make a scale drawing of the shelter, marking height, width and length along the side of the existing barn structure.

• 2

  Install a 2-by-8-foot header onto the barn at the predetermined height and location on the side of the barn. Level the header before attaching with lag screws.

• 3

  Drop a chalk line from each corner of the header to the bottom of the building. Check for plumb.

• 4

  Attach a string line from the bottom chalk mark and measure out to the proper width of the addition. Drive a stake in the ground. Fasten the string and repeat on the other end.

• 5

  Check for square by making a mark on the string line three feet out from the building. Then, measure four feet along the wall and check the diagonal line between the two marks. The diagonal should measure five feet. Check on both ends.

• 6

  Run a string line between the two outside corner stakes and mark the locations of the posts, which should be set no farther than eight feet apart.

• 7

  Dig holes two feet deep with a post hole digger. Insert the post and brace with 2-by-4s. Check for plumb, then add cement to the hole. Let the posts set up overnight.

Build the Structure

• 8

  Install the two 1-by-6-inch end boards by determining the angle of the pitch and cutting the ends so the end attaching to the barn is snug. Cut the same angle on the other end. Repeat on the opposite side. Cut all the 2-by-6-inch rafter joists at the same angle.

• 9

  Nail a 1-by-6-inch outside front support beam across the posts at the bottom of the end boards.

• 10

  Attach the joist hangers to the header board on the barn, 16 inches apart. Fasten the rafters into the joist hangers with nails.

• 11

  Attach the rafters to the front support beam with metal hurricane plates.

• 12

  Cut the top of the posts level with the rafters. Fasten the second 1-by-6-inch support beam to the front inside, aligning it with the bottom of the rafters.

• 13

  Cut the end beams. Add blocking pieces cut from 2-by-4s at each end between the rafters and nail in place.

Add the Roof and Finish

• 14

  Nail on the metal roofing.

• 15

  Cut and install the 2-by-4-inch braces to the top of the posts, tying into the roof structure. Braces should be at a 45-degree angle.

• 16

  Install a 1-by-6-inch fascia board to cover the ends of the rafters.