EPDM?

[zingo]

Have read that you should have EPDM rubber under the sill plate and above the header if you want to increase sound insulation (sound from outside). But what I don't know is how thick the rubber should be and how wide. Also, I don't know where you can buy it at an affordable price or if there is an alternative material that might be much cheaper. Does anyone know?

 

[Ingenjören]

Do not know what you consider an affordable price, but it is available for purchase at Beijer:

http://www.beijerbygg.se/templates/BB_Produkt.aspx?id=5266

/Ingenjören

 

[zingo]

Oops. It becomes 800 kronor which was roughly three times the price I was hoping for.