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Taf · 28-02-2012, 12:35

Is this outdoors? If so, an air gap would be great for stopping rot in the floor.

Cans of SEF don't go as far and therefore become very expensive very quickly. You can buy rockwool slabs, but it would have to be laid between load-supporting joists that a second floor would be laid upon (polystyrene would be too much of a fire hazard AFAIC).

28-02-2012, 12:35	#4
Taf cf.mega poster Join Date: Jun 2003 Location: Kairdiff-by-the-sea Age: 68 Services: TVXL BBXL Superhub 2ac (wired) 1Tb Tivo Posts: 9,812	Re: Expanding Foam as Insulation Is this outdoors? If so, an air gap would be great for stopping rot in the floor. Cans of SEF don't go as far and therefore become very expensive very quickly. You can buy rockwool slabs, but it would have to be laid between load-supporting joists that a second floor would be laid upon (polystyrene would be too much of a fire hazard AFAIC).