How likely is it that our flat roof contains asbestos?

crow22

So we have an extension on the side of the house that has a bathroom on the upper level. The extension has a flat roof and was built around 1960. We have no documentation regarding the construction.

Anyway it's now getting some leakage problems and we been up with a ladder and sealed most of the cracks in the roofing felt. One problem area is in the corner of the roof directly over what is the airing cupboard in the bathroom. The rain leaking in has caused the ceiling board in the airing cupboard (my words as I dont know what its called and its thinner than plaster board) to sag down slightly and some bits have fallen down. exposing the insulation above.

I was looking at this today and alarm bells started ringing. Its looks as though it might contain asbestos but i dont  know. It's grey/white in colour, maybe a couple of centimetres thick and a bit fibrous. I havent messed with it obviously!

A bit worrying for obvious reasons and the fact that the house is on the market. Any thoughts?

HampshireH

Get it sampled. It's not expensive to do so.

Albermarle

 It's grey/white in colour, maybe a couple of centimetres thick and a bit fibrous.

If the fibres are fairly long and easily visible, then it probably is not asbestos. 
Asbestos fibres are very small and are hardly visible as an actual fibre. This is why they are dangerous as they can get into your lungs.

Maybe get it samples anyway for peace of mind

Maybe post a photo ?