Can Hardiplank Be Installed Over Existing Siding

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Can hardiplank be installed over existing siding.

On existing houses old vinyl or metal siding must be removed but vinyl can be installed over old wood siding without removing it. Number one you can t shoot the hardiplank siding into the voids in your dutch lap siding. Installing vinyl over wood siding does require considerable. The best place to start is to closely examine the existing siding to get a good understanding of what condition it is actually in.

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. More than 50 years. 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. 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.

Imo it would not be a good idea to go over it. 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. 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.

Something you will want to keep in mind when making this decision is how long hardieplank will be on your home. 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. It is a structural adhesive generally used to bond the subfloor to the floor joists just prior to nailing. Why siding over existing siding is a bad move.