First off hi to DIY forum as this is my first post here.
Ok did some searching but cant find the info i need
So can anyone give me perhaps.. a post link on this site / web address , document link or even the formula for working out the cost benefit in terms of heating cost against increase in R value.
ie is there a way of working out how much each 0.1 increase in R value actually costs or saves as the case may be in a typical room.
Cheers
Nog