Hardie Board Over Existing Wood Siding

Without properly inspecting and examining your current siding it s probably hard to tell its actual condition.

Hardie board over existing wood siding.

Can i use liquid nails or glue with hardiebacker cement board. We ve been providing a better way to build for over 100 years. 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. With other siding types fiber cement engineered wood etc.

Imo it would not be a good idea to go over 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. Most hardie board siding comes with a 50 year limited transferable warranty. That said this is where you want to start when deciding if you should keep it.

Keeping your existing siding. Where hardiebacker board is being installed over a code complying subfloor for the attachment of tile the board is installed over a 3 32 1 4 thick bed of bonding mortar and then nailed down. Surprisingly many vinyl siding manufacturers state that it s perfectly acceptable to install their product over old siding. Left unchecked small issues can become major problems that could end up costing thousands of dollars to rectify.

Number one you can t shoot the hardiplank siding into the voids in your dutch lap siding. Number two even if you tried to match the exposure of the existing siding let s say the dutch siding is 5 on center and you picked 6 1 4 hardi that would also have a 5 exposure so that you would always be nailing. The manufacturers specifically say that to install their product over existing siding is to void the warranty. 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.

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. This siding is completely rot and insect resistant and can even handle salt spray from the ocean. The james hardie manual actually agrees that current siding works fine for a substrate but only if it s in acceptable. James hardie is the world leader in fiber cement siding and backerboard.