Just curious ?????
what's a "thermo insulated folding attic stairs"??
Surely the folding stairs are made from wood or metal-
is it the the trap door that's thermo sealed with a thick block of insulation. .?????
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The gataux

that did the rating a couple of years ago on my house -after we got the insulation in -
outside walls and attic-etc.(after getting the grant that was available at the time)
He 'fffed around with his laser yokey
Checked the radiators -back gas boiler-(only 2 years old at the time) said he never heard of it-I told him to look it up on his fancy laptop--His reply "its only 85% efficient"-
"Theres a draught from the chimney"-I told him there had to be cos that was where the gas outlet flue is.
=I had to pay him 200 lids -and then claim 100 back after his report went in.
A Rollix of the highest order
His report contained the following
not enough -energy saving bulbs
no thermostats on the radiators -forgot to mention they radiators were fairly new as well.
more lagging required on the hot press water cylinder
The gas back boiler not efficient
The rating --------a 'fffing E-
A Rollix of the highest order.
sent from my PC and typed on a keyboard (old fashioned black colour) using three fingers