Installing Hardiplank Siding Over Existing Siding

Keeping your existing siding.

Installing hardiplank siding over existing siding.

James hardie siding is made of cement so it will absorb moisture if it is installed like this. Thank you for any information. Now you probably want to know just how you re supposed to decide. Find a local contractor.

Does this mean that hardieplank cannot be installed directly over existing wood siding without voiding the warranty. Existing wood siding must be in good shape with no rot or mold and fastened tightly to the wall. Without properly inspecting and examining your current siding it s probably hard to tell its actual condition. The first course of any wall should be installed over a 1 4 lath strip to ensure a consistent plank angle see figure 1.

This would be on an older house but the wood siding is in good condition. Installing vinyl siding over wood siding wood must be sound. 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. If the wood siding is beveled or lapped you.

If hardie is installed too close to these surfaces there is a chance that the paint will start to bubble and peel. Why siding over existing siding is a bad move. Several contractors have suggested that the wood siding need not be removed. Optionally install the lap siding with a maximum 1 8 gap and caulk the joint see detail at right.

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. The hardie website is unclear on this issue. Install hardiplank siding with joints butted in moderate contact. Vinyl siding must be installed against a flat surface.