Soundproofing (again) Tin top roof...

is the site down?

 

Bitumen panels. Sorted.

 

@snotty Bitumen panels, These are the only ones I could find http://www.newtoncomm.co.uk/products/3480-products-3480/

what about some foil back wood floor underlay?

http://tradepriced.co.uk/comfort_silver_laminate_hardwood_underlay.html

 

http://www.cpupholstery.co.uk/product_info.php?products_id=111
NEEDLED WOOL FELT 1 METER
[n felt 1]£2.75

 

Similar to what I put in, a similar to what just about every modern car manufacturer uses.