Can Hardiplank Be Installed Over Existing Siding

Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty.

Can hardiplank be installed over existing siding.

This would be on an older house but the wood siding is in good condition. It s a perfect application for it because t 111 is nothing more than a textured plywood and a plywood makes a great sheathing. However it needs to be installed in accordance with our written installation instructions for hardiepanel siding in regard to framing joints paint and clearences above ground. Hardie plank joints butt joints james hardie siding is 12 feet long which means that siding on your longer walls will need to join together.

Something you will want to keep in mind when making this decision is how long hardieplank will be on your home. 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. And if a board does get wet but is not sitting in moisture for an extended period of time you can simply let it dry out before installing. Yes you may be able to save some money by not removing the old siding but that old siding could be hiding problems that may bite you down the road.

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. 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. The hardie website is unclear on this issue. Hardiplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 o c.

More than 50 years. This is the main task to tackle to make sure that there are no preexisting issues on the home. Get some regular cdx plywood the same thickness as your t 111 fill in the gaps put the tyvek on there put the hardie on there. Left unchecked small issues can become major problems that could end up costing thousands of dollars to rectify.

Or directly to minimum 7 16 thick osb sheathing. Several contractors have suggested that the wood siding need not be removed.