Hi,
Im having a nightmare in getting insulation for my extention(Roof). Part is flat and part is sloped. The archi is specifiying Kingspan K11 at 120MM for the flat roof I have hunted high and low for this but couldnt find anyone who could supply. Now going for Celotex TD4000 126mm but this seem just as rare and expensive. Building control say if thats what the Archi states, I need to use it. What official criteria do I have to hit with this? Im stuck in a rock and hardplace between building control and the designer. Is there any reason why I cannot use cheaper version to the same thickness?
Cheers, Lee.
Im having a nightmare in getting insulation for my extention(Roof). Part is flat and part is sloped. The archi is specifiying Kingspan K11 at 120MM for the flat roof I have hunted high and low for this but couldnt find anyone who could supply. Now going for Celotex TD4000 126mm but this seem just as rare and expensive. Building control say if thats what the Archi states, I need to use it. What official criteria do I have to hit with this? Im stuck in a rock and hardplace between building control and the designer. Is there any reason why I cannot use cheaper version to the same thickness?
Cheers, Lee.