Hello:

Live in New England.

If I re-do my house with vinyl siding, which would go directly over the
present T1-11 wood siding which is in poor shape, does it make sense
to have installed styrofoam (or other) insulation between the T1-11 and
the vinyl ?

a. Would the added insulation R value (no idea what it would be) justify
the added installation cost ?

b. Does it make for a "better" or smoother job ?

c. Anything to be particularly aware of in work like this ?

Thanks,
Bob