On 9 Mar 2013 11:36:26 GMT, David.WE.Roberts wrote:

I also wonder what liability said builder or roofer would be taking on
when issuing a certificate to say the roof was O.K.

Does anyone currently have to do this, and if so what does it cost?

Haven't a clue, are there any "standards" for flat roofs above those of
the Building Regs? As you say is any roofer going to issue a certificate
saying the roof is OK when he hasn't just built it or finished replacing
it?

Ask the insurance company to explain exactly what they want. How long is
left before the insurance runs out? It might be worth saying that you
aren't renewing immediatly as you cannot comply with their conditions
until they provide further information about how to comply and you will
also need reasonable time to comply once the information has been
provided. In the mean time you require that the current insurance remains
in place and covering your property. Do this all in writing, snail mail,
not email, keep copies.

--
Cheers
Dave.