Installing Hardiplank Over Existing Siding

According to the best practices manual from james hardie existing siding can be used as a substrate as long as it is in good condition meaning that it is not warped bowed curling delaminated or rotting.

Installing hardiplank over existing siding.

Why siding over existing siding is a bad move. The only downside of pneumatic tools is that sometimes the installer will get going a little bit too quickly and will lose track of where the nails are going. 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. Even though most reputable contractors will never install siding over existing siding there are knuckleheads out there that will say you can do it and it s not a problem.

The actual question is should the current siding be removed with osb installed or should the current siding remain to act as a substrate an additional layer beneath the top layer under the new hardieplank siding. This would be on an older house but the wood siding is in good condition. We have dozens of installation specialists throughout the u s. Installing hardiplank lap siding measure up from the ground 6 inches plus the width of one plank at a corner and make a mark on both sides of the corner.

Hardie plank siding is almost always installed with air nailers which are the best tool for quick installation. Or directly to minimum 7 16 thick osb sheathing. Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty. Hardiplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 o c.

As a homeowner you will work with a contractor who will facilitate the installation of your james hardie siding trim soffit wrap and flashing products including products with colorplus technology. The hardie website is unclear on this issue. Using existing siding for replacing siding the best place to start is to closely examine the existing siding to get a good understanding of what condition it is actually in. And canada who are available to work with any contractor or builder.