Is 1f roof felt ever green in colour?

[Oxbow16]

At a risk of getting chucked of the forum for over posting, I'm back again!

 

Delivery for my roof job came while I was at work. Home now and just looking at it and the 1f felt they've delivered is unmarked and green.

 

Don't know if I'm over worrying, but wanted to check it's 1f and I've not been palmed off with shed felt. It's not like any 1f I've seen before, but I've only ever come across it on existing buildings and so don't know if it has changed over the years. It is very heavy and quite sticky, if that helps.

 

Would rather know now than later whether it's wrong!

 

Many thanks

 

 

 

[Oxbow16]

[Oxbow16]

[Canski]

It looks like mineral felt to me. 

[Oxbow16]

I suspected as much, thanks for confirming.  

 

Bl00dy builders merchants!  

[Big Jimbo]

Whats it's being used on ? That looks like mineral felt.

[Oxbow16]

I'm making a repair to the roof where a flue was removed.  And putting in lead soakers and flashing at a wall abutment.  Thought while the slates were off it wouldn't hurt to renew the felt (and also turn it up the abutment behind the soakers, which is not how it is now).  

 

Ta