[pabscars]

Originally Posted by Tim Deegan

Is it possible to lift the floorboards, and then use rockwool?

Gets my vote,

Expanding foam is good for some circumstances but I wouldn't dream of using it as insulation under a floor because as it expands it will lift the floor boards up, then once it's set your buggered.

Also I would recommend leaving the joist's air to breath, you don't want moisture getting trapped and rotting the timber.

In my man shed at the side of the house I just used the moisture resistant tongue and groove type MDF sheet's you can get from builders merchants but it can be a bit expensive so my money is on the rockwool just for cost and ease.

---------- Post added at 12:44 ---------- Previous post was at 12:42 ----------

Originally Posted by Kymmy

You can always get a cavity wall company to blow in rockwool fibre.. Should be the same cost as getting the walls done

Good thinking Bat woman, I like your thinking

---------- Post added at 12:53 ---------- Previous post was at 12:44 ----------

Originally Posted by Barewolf

It isnt, the floorboards go underneath the base of the walls, or should i say the walls sit on the edge of the floorboards, either way, i cant lift them up. I wish i could because i could save money insulating then.

Ooooops, only just saw this sorry , then either Kymmy's idea or build a new floor are your only options really.

That I can think of