Fiber Cement Siding Over Concrete Block Insulation

One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam.

Fiber cement siding over concrete block insulation.

I m planning an extensive renovation of a 1950s cinder block home in central florida. Prefabricated fiber cement siding provides several pros and cons when applied as an exterior finish to icf. Method 1 over furring. Starter strip hardieplank lap siding nailed directly to block walls trim cmu wall 6 clearance to grade refer to table on next page for fastener type and fastener spacing.

My current question concerns insulating the exterior walls. I wouldn t hesitate to install 1 3 or 2 4 horizontal strapping 24 inches on center on top of the foam holladay recommends. Fiber cement siding comes in many colors and textures including some that mimic wood shingles. And other non nailable substrates e g.

Insulated vinyl siding is made of rigid contoured insulation permanently adhered to vinyl siding while fiber cement siding is made from a mixture of sand cement and cellulose fibers. Gypsum sheathing with combined thickness of 1 inch or less method 2 james hardie siding installed to furring strips that are attached through the c i. Wood fiber cement or plywood siding should not be installed directly over the foam writes senior editor martin holladay. Siding fastener length cmu wall spaced 16 or 24 o c.

Minimum nail length must accommodate sheathing and penetrate framing a minimum 1 inches. Current pneumatic nailers have maximum fastener lengths. Cement concrete block concrete forms. I ve looked at a lot of the material on building science and would like to.

Hardiplank is a fiber cement siding made for exterior use to cover a structure in a long lasting sheathing. Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g. Screw the strapping through the foam to the studs. Siding over rigid foam exteriors.

Cladding attachment over thick exterior rigid insulation background current building code does provide prescriptive means to attach cladding over exterior insulation table r704 3 note v. I ll be taking off the roof and taking down all the interior walls leaving a bare uninsulated concrete block wall with no finishes either on the inside or outside. Fiber cement siding stands up to wind rain hail fire insects and even hurricane level storms.