Installing Hardie Siding Over Foam

Becouse the foam compresses.

Installing hardie siding over foam.

Insulation is everyone having as much hell as i am installing fiber cement siding over 1 2 foam. Our company plans on removing old siding installing new 1 foam then new hardi plank siding. Things are going to get interesting when iecc 2012 is adopted which requires exterior foam zones 6 and up. Siding over rigid foam view all 5 photos play slideshow.

We will be leaving in the old windows. It then pops the nail right through the siding. Lower the pressure on the gun and make sure the gun has depth of drive. We re building a new home sw virginia with 2x6 studs on 24 inch centers.

My entire house is hardie over 3 4 foam that was gun nailed. I have tried several different air setings for my compressor. When applying james hardie siding directly over the combined thickness of foam sheathing continuous insulation and other non nailable substrates e g. Or directly to minimum 7 16 thick osb sheathing.

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. We had hoped to use 1 5 to 2 inches of eps rigid foam to the exterior of the sheathing then 3 4 inch x 4 inch plywood furring strips then lp smartside lap siding. 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 sill by 3 4 inch.

I seam to be blowing out the back side of the siding. Then i discovered that lp s installation instructions specify 1 5 inch x. The walls are 2x4 stud filled with guessing r 2 fiberglass batts with foil backed drywall inside and 1 2 crumbly yellow foam outside and vinyl siding over that. We knew we had to use the 76 series smartside product for the 24 inch centers.

These discussions will be quite common. Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over. Hardiplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 o c. Installing fiber cement siding over rigid foam sheathing i think the hardie instructions only allow for 1 foam like sailboat said sounds like mark s house is just fine however.

How to install rigid foam under siding. Hardiplank lap siding can also be installed over foam insulation up to 1 thick irregularities in framing sheathing and or foam insulation can mirror through the finished application.