In message . com,
wrote:

I guess this is a tough one....
I am thinking of make the most of two roof windows by letting the light
coming from these through the ceiling into the second floor of a
terrace house.

At the moment I am considering using sheets of polycarbonate
(triplewall 16mm) in the area just below the two windows. These sheets
would cover an area of about 2m x 4m around the centre of the loft
space while the rest will be covered with the usual chipboard.
Ideally, the loft area should be usable...in the same way as if it was
covered entirely by chipboard.
I've already done a quick test and I am quite positive that the
polycarbonate sheet will work just fine if not better than chipboard.

Not sure I'd want to trust it. More expensive, but have you considered
glass? Failing that, how about a sunpipe; see, for example
http://www.sunpipe.co.uk/

Good luck with the studio :-)

Hwyl!

M.

--
Martin Angove: http://www.tridwr.demon.co.uk/
Two free issues: http://www.livtech.co.uk/ Living With Technology
.... Brought to you by the Mother of all Messages