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.

Installing new siding over old siding.

This type of siding can be placed over some existing siding but most will not be good. There are online siding calculators that will help you. The manufacturers specifically say that to install their product over existing siding is to void the warranty. Can you put new siding over old siding in general or do i need to remove the existing one.

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. Surprisingly many vinyl siding manufacturers state that it s perfectly acceptable to install their product over old siding. Start with the side of your house with the least. That s why it s important to make sure that the quote you get includes removal of the old siding.

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. You can install vinyl siding over old wood siding but should not try to install new vinyl siding over old vinyl 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. 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.

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. With other siding types fiber cement engineered wood etc. Take your measurements to the hardware store and order your choice of vinyl siding. Since you need a firm base to install vinyl siding you first need to remove old vinyl and expose the underlying wood.

In new construction it typically is installed over wood wall sheathing wrapped with rigid foam insulation and a moisture barrier. Never install vinyl siding over rotten wood. 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. 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.

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. Any imperfections in the wall will almost always show up in the siding.