Going over the existing siding adds to the r value by creating an air space between the insulation and old siding.
Old siding under newer siding.
Removing asbestos is often cost prohibitive for most people.
Just recently i got some clear confirmation that our policy of tearing off old siding before installing new siding is the right policy.
But be sure to check your local building codes first to see if it is allowed in your area.
Inspecting the walls under the siding when the old siding is removed from your home the home siding contractor will inspect the wall and insulation to ensure it is okay.
If the siding cedar or hardboard is in good shape and the substrate is wood it is foolish to remove the old siding.
However removing the asbestos siding first though more expensive is the best alternative in the long run.
Value report new vinyl.
Cut into square or rectangular shapes and is layered vertically to give the impression of many layers of shingles.
Applying a layer of sheathing or sheets of foam insulation over the asbestos then covering it with vinyl siding is a common practice.
If there is a problem it can be repaired before the new siding is added.
It also eliminates the problem of mold forming when insulation is attached directly to the substrate.
This usually happens on walls with wooden siding that is not uniform or hand split such as cedar shakes.
There are two options for this.
Best siding value good investment.
Long think pieces and mounted side by side horizontally across the house.
In a 2015 cost vs.
Other than color which dictates the appearance of vinyl siding there are two main shapes or types.