How To Build A Lean To Roof On Existing Roof
In the case of a lean to roof over an addition the existing rafters will have to be cut away to accommodate the addition and the shed roof will require support where.
How to build a lean to roof on existing roof. Design lean to roof per your local building codes. Any water runoff will flow off of the main roof and hit the lean to at an angle to prevent pooling and flooding in the lean to. For shingles or 24 o c. Attaching patio cover existing roof attaching patio cover existing roof 14.
Place the starting panel onto one edge of the roof. Place the rib inside closure inside the groove both overhangs will have this. Fit the trims to the sides of the lean to roof and lock them into place with 6d nails. Attach patio roof.
The side of the panel that has a slightly flat side is to place on the roof. Add porch roof existing build metal over deck add porch roof existing build metal over deck 11. Space rafters either 16 o c. Attach patio roof existing house attach patio roof existing house 13.
Measure 8 feet from the existing structure towards the outer direction and dig a deep hole to drive the post in. The lean to s roofing will need to fit fairly snugly underneath the existing roof to prevent rain from blowing into your addition. Use 1 8 lumber for the side roof. From this existing post measure 3 feet distance in the same line dig a hole and drive the second post in.
The other side is for overlapping the panel. Mark the area where you want the structure. The preferred spot would place the lean to under the overhanging roof of the existing building. Make angle cuts to the trims with a miter saw.
Drive the post in and fill the hole with concrete to set it in place. Determine where the lean to will be attached to the existing building. Attaching below the ridge. Use right size of rafters and headers.
Add roof existing deck add roof existing deck 12. Typically a lean to roof will lay at a different pitch than your existing roof. Front wall trims lean to addition.