"MyOwnPlanet" wrote in message
om...
It is recommended that 3# felt be placed under wood flooring as it is
layed. What is the purpose of that? or "multi" purpose of that?

I have torn older floors up before that did not have any underlayment
(just subfloor). Were those floors installed incorrectly? or is felt a
new thing?

Installing 3/4 t&g hardwood flooring over kraft paper directly over the
subfloor (no underlayment) has always been the norm in my neck of the woods.
The kraft paper is a water resistant membrane. I think it's the same stuff
that goes over insulation only it comes in rolls. I'm sure the 30# felt
would do the same but is prolly more expensive and overkill. IMHO of
course.
SH