Installing New Siding Over Old

Why siding over existing siding is a bad move.

Installing new siding over old.

With other siding types fiber cement engineered wood etc. Foam board is however often added in order to help level out the wall when it has certain problems with it. In most cases you can put new siding directly on top of old siding without having to remove the old siding first and in addition it will in fact add an addition layer of insulation thereby helping lower your energy bill. There are a few things that you ll need to know when doing this however.

The first is your moving the siding of the house about 3 4 of an inch outward. On existing houses old vinyl or metal siding must be removed but. Surprisingly many vinyl siding manufacturers state that it s perfectly acceptable to install their product over old siding. In new construction it typically is installed over wood wall sheathing wrapped with rigid foam insulation and a moisture barrier.

Can you put new siding over old siding in general or do i need to remove the existing one. The trim will the windows will be a bit deeper than perhaps you ve seen in the past but that siding can stay just like that. It s especially affordable when it placed over existing siding because the labor of removing the old siding is not needed. That s why it s important to make sure that the quote you get includes removal of the old siding.

Since you need a firm base to install vinyl siding you first need to remove old vinyl and expose the underlying wood. Never install vinyl siding over rotten wood. 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. One major stipulation with the james hardie siding warranty is that it specifically states that if any project is not installed according to the best practices standards the warranty on that material is null and void.

The manufacturers specifically say that to install their product over existing siding is to void the warranty. Removing existing siding and installing osb has several benefits such as having brand new substrate on the home and the ability to inspect the wall cavity and all framing insulation and structural integrity of the home before replacing siding.