Lean To Roof Wall Plate Detail

Good detailing of the roof wall junction for lean tos is important for the weathertightness.

Lean to roof wall plate detail.

In scotland 100mm x 25mm wall plates should be used in long lengths butt jointed. We then measure the distance from the peak of the pole plate to the edge of the masonry wall plate in several positions. Will all be fixed to them. In order for all the roof components to work they must be square parallel level and fixed down properly.

In this lean to roof the upper part of the common rafters is located on a wooden wall plate and also placed with corbel. This detail for cmu installation only. The rafter is cut so it sits down onto the wall plate which is in turn fixed down onto the inside skin of a cavity wall. Use right size of rafters and headers.

Wall plates should generally be in lengths of not less than 3m but shorter lengths should extend over at least 3 joists rafters or trusses. X 5 8 bolt brass alum. Getting the wall plates or top plates as they are sometimes called right is important because all the ceiling joists roof rafters hips etc. This is because the quirks of lean to roofs means that you are reliant upon the existing walls being plumb true and not in twist and absent of any sticking out bricks etc which they are not.

Detail for attachment to metal panel siding or fascia. The lower end is done the same way a skillion or shed roof is. Space rafters either 16 o c. For shingles or 24 o c.

Design lean to roof per your local building codes. Notch a birdsmouth where it sits on the low wall and extend it past the wall for the eaves. Wall plates should be joined using half lapped joints at corners and in running lengths. The joist completes the strong triangle shape with the rafters.

The high end of the rafter sits on or attaches to a ledger plate attached to the existing wall. The ceiling joists span from wall plate to wall plate and are sometimes bolted to the rafters to help stop the ridge dropping and the roof rafters spreading. This corbel is made from stone brick or iron. Section 4 roof wall intersections build supplement flashings 85 tricky lean to junction figure 82 figure 83a a b rafter top plate purlin blocking studs lean to junction.

Lean to roof is a free standing structure. A lean to roof just means it s attached to an existing structure. The wall of one side is taken higher than the wall on the other side. Construction sequence step 1 framing.