tempered hardboard air gap?

[byggare100]

Hi, is regular masonite fine for the air gap, or does it need to be tempered?

 

[Mr perfekt]

Hi, is regular masonite fine for the air gap, or does it need to be tempered?

Raw lumber all day long, masonite absorbs moisture, cheaper and better with raw lumber.

 

[Matti_75]

Regular masonite works fine

 

[byggare100]

It seems to vary how people view it, anyone else who can confirm that regular masonit is good enough?

 

[tergo]

if there is an air gap under the råspont, regular works, but if it is to be placed there instead of råspont, it should be oil-hardened