Insulation, Radiant and Vapor Barriers - what's best way to cut polystyrene?

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kskwsde
04-17-05, 02:44 PM
I need to cut some extruded polystyrene insulation boards and was wondering what's the best method to cut it? i'm afraid using a utility knife will not give me a straight square edge, while using a saw might rip the edge of the insulation? any ideas? should i use the table saw with a thin blade for wood finishing work?

thanks,
kevin

chfite
04-17-05, 03:04 PM
When I installed Owens Corning Foamular insulation board under my slab, I used a handsaw to cut the foamboard. I marked a cutting line on the board and cut along it. It was easy to make a straight cut.

Hope this helps.
IHI
04-17-05, 08:00 PM
I've had good luck with my table say and fine tooth blade.

kskwsde
04-18-05, 07:55 AM
thanks for the tips, i think i'll try using a fine toothed blade in my table saw to ensure i get a good right angle cut

thanks,
kevin