In message , T i m
writes

Seconds are slightly
damaged: dented/overlong etc.

I guess if that was say a sheet of polycarb or cement fibre you could
easily cut off the excess or lose a damaged corner somewhere where it
didn't matter. I seems this AS35 is quite a 'engineering' solution in
how the joints are made / sealed etc.

They are exempt from LPC approval so may
not be a good idea for a domestic installation.

Even for something like a fully detached workshop Tim?

Umm.. My insurers (NFU Mutual) were quick to ask if the foam insulation
met the regulations. ISTR this was changed a few years back so my
concern was that *seconds* might be the earlier version sold without LPC
approval. Mine were used for stables so no human occupation.

I used a metal cutting
circular saw to cut them but there may be other ways.

Ok ..

For a ridge, you will need internal and external folded section at
around £5.00/m. Ridge fillers at £0.75ea. Also 90 deg. barge at a
similar price. Fixings are not exorbitant.

That's another couple of hundred quid?

Delivery might be an issue as these usually arrive on an artic fitted
with a Moffet Mountie fork truck. Delivery to Herts. was £150.

So would be the same for me (Herts) as it's probably per load rather
than value?

I have some offcuts if you are that close and wanted to play.

I guess you have 3" cement fibre in self colour.

nips out with tape measure Yep ;-) While we are on the subject,
would you know what other colours are available please?

Slate blue (preferred by our planners as we have slate roofing
elsewhere), Van Dyke brown, Juniper green, Merlin Grey. Other colours to
special order.

I think Brookers at Hitchin might supply locally or try your local
builders merchant.

I found delivery times
on painted *big 6* sheets had reached 3 months, recently.

Oh, ok, well in the real world I have a lot of work to do before I get
to that stage so may not be a problem etc. re the painted sheets Tim,
is this something that would need re-doing in time?

Not really. The surface will degrade slowly and may support lichen in
damp climates. The paint will fade over the next ten years.

I suppose there are more D.I.Y. solutions such as fitting an undersheet
below the purlins filling the void with rockwool and then fitting
plastisol coated roof sheets over the top. Wall sheets are cheaper as
they are normally 0.5mm thick compared to 0.7mm for the roofing.

regards
--
Tim Lamb