Building Shed Walls – Instructions
Learn how to build shed walls with post frame construction. It is affordable and easily mastered. Page includes step by step instructions and a PDF framing detail.
Use a straight 2×4 and a 4′ level to establish a level mark on the post for reference
Using these marks, determine the shortest post and saw it where the top of the roof beam will be.
Saw the other posts. Chainsaws work great, but be careful.
Build the roof beam now. It can be 1 – 3 ply’s and consist of 2×8 or larger. The important thing here is that the outside of the roof beam be flush with the outside of the wall girts. For a 2 ply beam, notch the post for the inside ply of the roof beam. Most applications will use a single 2×10.
Figure out a layout for the 2×4 wall girts. The easiest way is to pull from the top down 24″ and this will be the top of the girts.
Building shed walls is not rocket science. But there is a formula for the perfectionist.
Multiply the number suspected of girts by 3 1/2″. Reference it as take-off. Subtract the take-off from the dimension in between the top of the bottom girt and the bottom of the roof beam. Divide this by the number of girts minus one (the number of spaces). Reference this equivalent as “spacing”.
Start at the bottom and mark the spacing, then mark and mark another 3 1/2″. Repeat as needed. Check the top spacing. Layout every post.
Nail on the girts with three 16d galvanized deck nails per end.
This setup is ready for vertical siding, metal siding, or OSB plywood sheathing.
Shed Wall Framing Detail
Use a post on each side of any rough opening. For doors, add five inches to the door size for the inside to inside measurement of the posts. For windows, add three inches to the recommended rough opening. This allows for the trimmers.
Building shed walls with rough sawed lumber is certainly a feasible option. Use red oak for everything including the siding. It may not last a hundred years, but there is no danger of chemical exposure. After all, if it worked for hundreds of years for building barn walls, it will work for building shed walls!