Lean To Roof Wall Plate Detail

Wall plates are to be fixed to masonery using hardened nails 4mm in diameter x 75mm long or 50mm long wood screws if fixed into timber.

Lean to roof wall plate detail.

By fixing the joists to the wall plates and securing the wall plate with vertical holding down straps at least 1m long and 30mm x 2 5mm in cross section at 2 0m centres. X 5 8 bolt brass alum. Iron knee straps and bolt are also used to connect the rafters to the post plate. The joist completes the strong triangle shape with the rafters.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Lean to roofs the simplest of pitched roofs is the lean to roof commonly found forming the rear extensions to terraced housing. Design lean to roof per your local building codes. A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates.

A key part of my approach is using a special piece of flashing at this. Downspout strap detail 1 4 dia. To fix the joists and rafters down on to the wall plates they should be toe or skew nailed to the top plate like below. For shingles or 24 o c.

When attaching ledger board to an existing wall install proper flashing when required. The exterior of a house presents plenty of opportunity for leaks. Space rafters either 16 o c. To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.

Use right size of rafters and headers. The lower ends of common rafters are notched and nailed to a wooden post plate joined to the top of posts on verandah wall. 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. Detail for attachment to metal panel siding or fascia.

Good detailing of the roof wall junction for lean tos is important for the weathertightness of a building but this junction can present some challenges. 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. Set out the ceiling joists onto the wall plates the ceiling joists are installed before the rafters as they will stop the roof spreading and also give something for you to lay planks across to stand on when building the roof. This detail for cmu installation only.

The sloping timbers are known as rafters and are supported at the top by building them into the solid wall not recommended nowadays and at the bottom by securing to a wall plate. In this lean to roof the upper part of the common rafters is located on a wooden wall plate and also placed with corbel. The wall of one side is taken higher than the wall on the other side.