Fiber Cement Siding Over Concrete Block Insulation

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.

Fiber cement siding over concrete block insulation.

A third party life cycle assessment found that insulated vinyl siding has a lower overall environmental impact than fiber cement second only to traditional vinyl siding and cedar. 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. I m planning an extensive renovation of a 1950s cinder block home in central florida. 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.

Fiber cement siding stands up to wind rain hail fire insects and even hurricane level storms. I ve looked at a lot of the material on building science and would like to. Method 1 over furring. Fiber cement siding comes in many colors and textures including some that mimic wood shingles.

Though generally used over wooden house sheathing you can mount your hardiplank siding over brick with only few preparatory steps. Current pneumatic nailers have maximum fastener lengths. Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g. Hardieplank lap siding 6 clearance to grade trim refer to ner 405.

Minimum nail length must accommodate sheathing and penetrate framing a minimum 1 inches. Cement concrete block concrete forms. Siding fastener length cmu wall spaced 16 or 24 o c. And other non nailable substrates e g.

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. My current question concerns insulating the exterior walls. Hardiplank is a fiber cement siding made for exterior use to cover a structure in a long lasting sheathing. I wouldn t hesitate to install 1 3 or 2 4 horizontal strapping 24 inches on center on top of the foam holladay recommends.

Wood fiber cement or plywood siding should not be installed directly over the foam writes senior editor martin holladay. Screw the strapping through the foam to the studs. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam.