styrofoam insulation installation

iampots

I am going to put 2 inch styrofoam insulation on my 30 yr. old 4-level split house after I remove the old siding. Then add new vinyl siding later.
Does putting 2x2 furring on first and butting the sheets of insulstion to them cause any problems with lowering the insulation factor or is the correct way to do it?
Is there anything I should be careful with or watch for?

I am installing styrofoam insullation to the exterior of a 30 year old house and want to know if it is advisable to add furring. And will it reduce the insullation integrety of the home.
I would like some advice on what to be careful of when I do this job.

(2 threads on same subject merged)
-Moderator

Maintenance 6

What type of construction are the walls of the house made up of?
Framed? Block?

iampots

Hi
It is 2X4 lumber on 16 in. center.

Gary in WA

What kind of siding will you be removing?

Be safe, Gary

__________________

iampots

The old siding is X90.

Tom Struble

do you have enough roof overhang for the desired thickness of siding and foam?2'' is a pretty thick expensive foam board,do you understand the flashing details that are needed to sucessuly keep bulk moisure from the structure?

installing furring strips and insulating inbetween is not the best idea