Can You Put Hardie Board Over Wood Siding

The james hardie manual actually agrees that current siding works fine for a substrate but only if it s in acceptable condition.

Can you put hardie board over wood siding.

Furring strips can be 1 by 2 inch or. The board must be mechanically fastened every 8 on center to the wood or metal studs spaced a maximum of 16 on center. However we recommend hardiebacker 500 if you need to make a smooth transition to drywall. Any lower and you might see a few nail heads poking through the bottom of the next board any higher and your siding is likely to be loose and.

James hardie fiber cement siding is engineered to stand up beautifully whatever the elements and comes with the option for an authentic woodgrain finish. The hardie website is unclear on this issue. Hardie plank siding has a nail line across the top of the board that is 1 down from the top and nails are supposed to fall between and 1 from the top of the board to give the best hold. This would be on an older house but the wood siding is in good condition.

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. Several contractors have suggested that the wood siding need not be removed. 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. This is the main task to tackle to make sure that there are no preexisting issues on the home.

If the wood siding is beveled or lapped you will need vertical furring strips 16 inches apart covered with rigid foam board to provide a flat surface. Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty. That said this is where you want to start when deciding if you should keep it. A vapor barrier is needed if required by local building codes.

Thank you for any information. Hardiplank is a fiber cement siding made for exterior use to cover a structure in a long lasting sheathing. Without properly inspecting and examining your current siding it s probably hard to tell its actual condition. Why siding over existing siding is a bad move.