Can Hardiplank Be Installed Over Existing Siding

Imo it would not be a good idea to go over it. On existing houses old vinyl or metal siding must be removed but vinyl can be installed over old wood siding without removing it. The best place to start is to closely examine the existing siding to get a good understanding of what condition it is actually in.

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Can hardiplank be installed over existing siding.

It is a structural adhesive generally used to bond the subfloor to the floor joists just prior to nailing. Installing vinyl over wood siding does require considerable. Something you will want to keep in mind when making this decision is how long hardieplank will be on your home. More than 50 years.

Why siding over existing siding is a bad move. 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. 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. Installing siding over existing stucco does not give us a chance to identify underlying rot issues so if you have any concerns a full removal could be your best bet.

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. 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. Liquid nails is not a bonding mortar. Beyond removal to assess and repair rot damage sections of the wall where stucco is bulging or otherwise out of square may need to be removed in order to get an even fastening.

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. 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. 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. Number one you can t shoot the hardiplank siding into the voids in your dutch lap siding.