Fiber Cement Siding Over 1 Inch Insulation

Cover the house walls with 4 by 8 foot sheets of rigid foam insulation typically 1 2 to 1 inch thick nailed to wood sheathing with 1 1 2 inch broad headed galvanized nails every 16 to 18 inches.

Fiber cement siding over 1 inch insulation. One new wrinkle for many builders is walls built with fiber insulation. Installing hardie over 1 quot. With insulation thicker than 1 inch i would consider using wood furring strips on galvanized steel zee girts or hatbars so that you have enough options for proper fastening. We put 2 x 4 furring studs laid flat over the foam and attached to the wall studs with 1 5 inch foam between the furring studs rain screen over everything and finally the lp siding.

Gypsum sheathing up to 1 inch thick the foam sheathing and other non nailable substrates do not have nail holding capacity. I seam to be blowing out the back side of the siding. Of 3 to 3 5 which limits insulation thicknesses to 1 5 max 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5 max insulation therefore for insulation greater than 1 5 direct attachment of cladding though the insulation back to the structure is often not practical. Insulation is everyone having as much hell as i am installing fiber cement siding over 1 2 foam.

This only increases the wall thickness 3 4 inch vs the furring strips william costello was planning to use and would only require increasing the interior window. Siding over rigid foam a vented drainable air space keeps wood siding dry and stable. Fiber cement insulated vinyl siding and fiber cement can both provide a durable exterior solution for your project. Becouse the foam compresses.

You didn t indicate where you live but you could use a layer of tyveck paper to allow moisture thru from the inside to the outside and then cover this with lapped 15 asphalt felt to create a seperate drainade plane for any water comming from the rain getting thru the cement siding 1 inch rigid insulation could be applied beneath the siding and over the felt. Fiber cement insulated vinyl. I would also consult a local structural engineer to make sure there is not undue force on the fasteners due to gravity load or wind load. Fiber cement offers minimal energy savings at 15 r value but can be installed with fanfold or insulating sheathing products to improve the r value of the whole siding system.

When applying james hardie siding directly over the combined thickness of foam sheathing continuous insulation and other non nailable substrates e g.