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.
Is it okay to install siding on top of siding.
Because few people do it in the fall and winter installer are more readily available and you may be able to get a good deal.
Why siding over existing siding is a bad move.
Installing siding may seem like a relatively easy project to do on your own.
Generally people get both done at the same time.
Well if you are looking to buy one project at a time such as windows then siding or vice versa then i must say that is not a good idea.
However most homeowners do not have much experience with vinyl siding installation.
Fall and winter can be the best time to install vinyl siding yes installers can put up new vinyl siding year around.
Since the material is relatively flat the new siding can be installed easily and this also adds an additional layer of security for the siding.
I understand that is not always the case though.
It may make sense to hire a siding contractor for a number of reasons.
Covering flat walls such as t 111 or stucco siding is usually a prime siding for re siding.
Safety can be a big concern when it comes to siding installation.
Vinyl siding must be installed against a flat surface.
Weak points are usually at the overlap with sheets above it as the z flashings between the boards may leak if not installed well and cause the siding to delaminate and or rot.
Most of the james hardie installation requirements in canada are designed to deal with excess moisture.