Siding Over Sheathing

The roxul panels would have to sit in between the furring strips.

Siding over sheathing.

Whether you re building walls on a new home or you re residing an older one exterior sheathing has an important role to play. Installing vinyl siding over wood siding. Sheathing for vinyl siding. For example if you were using a layer of 1 5 thick roxul comfortboards over your exterior wall sheathing then i m assuming that you would also need 1 5 thick furring strips attached directly through the sheathing to each wall stud in order to attach the cladding.

The tricky part can be dealing with the added thickness where siding meets windows and doors. Without proper air flow moisture can build up behind the home s exterior siding and supporting structures cannot dry out creating mold and deterioration problems. Applying weather resistant sheathing over old siding is the fastest easiest way to provide a flat nailable surface for vinyl or aluminum siding installation. Exterior sheathing is a board or panel that may be made of several different materials.

Structural exterior wall sheathing ties framing studs together making the walls resistant to twisting and bending. Siding should be nailed into studs at maximum 24 61cm centers when applied over wood based solid sheathing and 16 41cm on center when applied without sheathing. Exterior wall sheathing strengthens the wall system provides a nailing base for the siding and gives a layer of protection against outside elements. When applying james hardie siding directly over the combined thickness of foam sheathing continuous insulation and other non nailable substrates e g.

The basic premise of method 1. Vinyl siding can be installed over common wood sheathings such as plywood oriented strand board osb or other materials e g foam plastic insulating sheathing. Many homeowners choose vinyl siding because it is relatively inexpensive easy for a do it yourselfer to install resists insects and rot and never needs. As home construction has evolved throughout the years we have seen sheathing methods change from boards to plywood to oriented strand board osb.

The thickness of wood sheathing counts toward the total thickness that the fasteners must penetrate into nailable material usually 1 1 4 32mm. Exterior wall sheathing is either structural or non structural.