Installing Hardiplank Siding Over Existing Siding

James hardie siding is made of cement so it will absorb moisture if it is installed like this.

Installing hardiplank siding over existing siding. Thank you for any information. Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty. Install hardiplank siding with joints butted in moderate contact. The first course of any wall should be installed over a 1 4 lath strip to ensure a consistent plank angle see figure 1.

Installing vinyl siding over wood siding wood must be sound. 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. 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. Find a local contractor.

Why siding over existing siding is a bad move. Vinyl siding must be installed against a flat surface. Now you probably want to know just how you re supposed to decide. Without properly inspecting and examining your current siding it s probably hard to tell its actual condition.

The hardie website is unclear on this issue. Optionally install the lap siding with a maximum 1 8 gap and caulk the joint see detail at right. This would be on an older house but the wood siding is in good 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.

Keeping your existing siding. Existing wood siding must be in good shape with no rot or mold and fastened tightly to the wall. If hardie is installed too close to these surfaces there is a chance that the paint will start to bubble and peel. If the wood siding is beveled or lapped you.