Can You Put Hardie Board Over Wood Siding

Though generally used over wooden house sheathing you can mount your hardiplank siding over brick with only few preparatory steps.

Can you put hardie board over wood 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. The hardie website is unclear on this issue. This would be on an older house but the wood siding is in good condition. Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty.

Yes hardiebacker 1 4 cement board may be used in a shower. However we recommend hardiebacker 500 if you need to make a smooth transition to drywall. The james hardie manual actually agrees that current siding works fine for a substrate but only if it s in acceptable condition. 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 board must be mechanically fastened every 8 on center to the wood or metal studs spaced a maximum of 16 on center. James hardie fiber cement siding is engineered to stand up beautifully whatever the elements and comes with the option for an authentic woodgrain finish. A vapor barrier is needed if required by local building codes. To achieve the look you ll use hardiepanel vertical siding as your base material.

Why siding over existing siding is a bad move. Without properly inspecting and examining your current siding it s probably hard to tell its actual condition. Several contractors have suggested that the wood siding need not be removed. 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.

That said this is where you want to start when deciding if you should keep it. 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. 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. Furring strips can be 1 by 2 inch or.