Installing Hardie Siding Over Foam

Siding over rigid foam view all 5 photos play slideshow.

Installing hardie siding over foam.

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. Installing hardie over 1 quot. We re building a new home sw virginia with 2x6 studs on 24 inch centers. 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.

Our company plans on removing old siding installing new 1 foam then new hardi plank siding. Gypsum sheathing up to 1 inch thick the foam sheathing and other non nailable substrates do not have nail holding capacity. It then pops the nail right through the siding. I think there s tar paper in there somewhere but they were pretty casual about putting it on at least 4 of the bottom of the walls exposed in most places.

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. My entire house is hardie over 3 4 foam that was gun nailed. I seam to be blowing out the back side of the siding. We knew we had to use the 76 series smartside product for the 24 inch centers.

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. 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. Becouse the foam compresses. How to install rigid foam under siding.

When applying james hardie siding directly over the combined thickness of foam sheathing continuous insulation and other non nailable substrates e g. These discussions will be quite common. 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. Lower the pressure on the gun and make sure the gun has depth of drive.

We will be leaving in the old windows. Insulation is everyone having as much hell as i am installing fiber cement siding over 1 2 foam. Hardiplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 o c. Or directly to minimum 7 16 thick osb sheathing.

Things are going to get interesting when iecc 2012 is adopted which requires exterior foam zones 6 and up. Siding over rigid foam a vented drainable air space keeps wood siding dry and stable.