How Do You Properly Install HardiePlank Siding?


Quick Answer

To properly install HardiePlank siding, cut the planks to the required size using a power drill or a score, install a lath strip on the house's wall, nail the first plank over it using a nail gun, and attach the subsequent planks by overlapping with the previous ones. Install the siding in a horizontal direction, connect the siding joints on a stud, and use joint flashing beneath all the joints.

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Full Answer

Begin installing HardiePlank siding by marking the required measurements on the planks. Clamp the planks on sawhorses, and cut to size using a carbide-bladed power drill or a snap knife and score.

Identify the lowest spot on the houses' side, and install a 1 1/4-inch lath strip along the outer wall's bottom side just over the water table. Position the first siding plank over the lath strip so that it overlaps the latter by 1 1/4 to 1 1/2 inches. Continue installing planks in this manner to the top edge of the wall.

Use 11-gauge roofing nails for the installation. Shoot the nails using a nail gun so that they are positioned 1 1/8 inches from the plank's top edge. Drive the nails into the siding and the wall studs. Install the planks row by row.

If more than one plank is required in a row, position the sides of two planks over a wall stud and flush with each other, and install. To make the joints weather-resistant, position joint flashing beneath them so that each one extends 3 inches on either sides of a joint.

When installing the HardiePlank siding around trims and windows, maintain a gap of at least 1/8 inch to allow for expansion. Use caulk to seal the gaps.

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