Rick Hughes wrote:

I drylined all of my house with a product called Fermacell ....
initially I used a standard circular saw .. after one cut you could not
see in the room for 20mins .. the width of the blade turned that
quantity into flour !

I bought a battery operated saw which by default use thin kerf blades
(as it takes less power to take a thin cut)

This proved excellent .. massive reduction in dust.


Jigsaw with a scalloped 'bread knife' blade - cuts foam with no dust at
all.

Likewise I'd be inclined to use a jigsaw for the original floor cutting
job as the kerf is narrower than almost any circular saw. Shorten the
blade to the bare minimum to reduce the risk of hitting a pipe or cable
(although there's always some risk involved in blind plunge cutting).


--
Ian White