In uk.d-i-y, Tim S wrote:
Mike Barnes wibbled:

I had a CERT (Carbon Emission Reduction Target scheme) assessment the
other day.

There are three lofts that need extra insulation. One is fully boarded.
One has a few boards lying around on top of the joists to make it easier
to walk around. One is almost (but not quite) impossible to access,
being under a shallow roof over a single-storey extension.

The agent pointedly asked me if it was OK to roll out insulation over
the boards, and to blow insulation into the tight space. When I asked
why I wouldn't want that, he replied vaguely that some people wouldn't
be happy with it, but wouldn't explain why not.

Is there any reason why I shouldn't have roll insulation over the
boards, and blown insulation where roll insulation would be impossible
to put in place?


Partly it's your choice - I rather be less efficient than have a loft I
couldn't store stuff in because the boards were buried under fluffy.

We've had a larger garage built (not DIY , so we don't need the space
in the loft any more.

But - big but - the important question to ask is: will your electrical
cables stand being buried under =200mm insulation?

That would be the case whether or not the loft was boarded. As it
happens, there's only lighting up there - no problem.

--
Mike Barnes