How To Install Fiber Cement Siding Over Old Siding

Remove the siding and install oriented strand board commonly referred to as osb or to use the existing siding that s on the house now as substrate or layer beneath the top surface underneath the hardieplank siding.

How to install fiber cement siding over old siding. Measure up 0 25 in 0 64 cm from where you want the bottom of the fiber cement siding to be then snap a level horizontal chalk line. Snap a line 1 in. Apply a vertical bead of caulk at each end of the wall. Attach a horizontal strip of wood lath that s 0 25 in 0 64 cm thick and 1 25 in 3 2 cm wide directly above the chalk line.

Score the cut line with a utility knife and snap the siding in two. Do not overdrive the nails. The main concern to understand is that the hardieplank siding is going to be on the house for. There are two options for this.

Position your first course of siding inch below the starter strip and nail the siding into the studs 1 inch down from the top of the siding. Install these fragile starter strips with a 15 gauge trim gun. Find your most beat up pieces of siding and rip them down into 1 1 4 in. Use galvanized siding nails and make sure that the nails penetrate a minimum of 1 1 4 inches into the framing.

Above the bottom of the wall sheathing as a guide.