Installing New Siding Over Old Siding

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.

Installing new siding over old siding.

How to install vinyl siding over wood siding measure the amount of vinyl siding that you ll need to order. On existing houses old vinyl or metal siding must be removed but. 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. When getting a quote for residing your home removal and disposal of the old siding should be factored in to any quote you get from a contractor.

Take your measurements to the hardware store and order your choice of vinyl siding. Surprisingly many vinyl siding manufacturers state that it s perfectly acceptable to install their product over old siding. This type of siding can be placed over some existing siding but most will not be good. Just like vinyl siding you ll need to ensure the siding surface is completely flat either by the old siding or by adding slats to the wall.

There are online siding calculators that will help you. 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. With other siding types fiber cement engineered wood etc.

Contractor quotes can vary wildly. You can install vinyl siding over old wood siding but should not try to install new vinyl siding over old vinyl siding. 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. Can you put new siding over old siding in general or do i need to remove the existing one.

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. The manufacturers specifically say that to install their product over existing siding is to void the warranty. In new construction it typically is installed over wood wall sheathing wrapped with rigid foam insulation and a moisture barrier. When old siding is already in place knowing how new siding is installed is highly important and obviously is going to determine just how successful a new install is in terms of longevity and proper installation.

Never install vinyl siding over rotten wood. Foam board is however often added in order to help level out the wall when it has certain problems with it.