The suppliers of the particular multifoil material claimed that it was equivalent to 100ml of celotex. I therefore set up an experimental model to simulate heat loss from a sealed container in which only the insulation material was varied. This together with some of the arguments by the different suppliers led me to carry out my own experiments which I hoped would give me the reassurance that the foil insulation was the way to go. The posting by "Biff" on his kitchen experiment to measure the insulation properties of foil vs bubble wrap and a few other materials, left me with some doubts as to the insulation benefits of the multifoil. The new insulation material clearly has a potential advantage for barn conversions and I was eager to get on with it - that was until I read the discussion on Multifoil insulation on the green building forum. I became aware of the differences of opinion about this new material after doing a quick search on the web, but I put it down primarily to competitor infighting, not uncommon with a new technology.Īs a physical chemist I could see the theoretical benefits of using reflective materials to reduce heat loss and was very tempted to go ahead, despite there be no conclusive evidence of it’s effectiveness. It sounded very promising and ideal for a wooden barn conversion where there was little space and we wanted to expose as much of the timber work as possible. The builder who is leading the work on my barn conversion suggested we consider using multifoil insulation about a year ago - it was very easy to apply, more expensive but much more efficient. I am in the process of a having a barn converted and have been intrigued and also highly frustrated by the debate on the pros and cons of multifoil insulation material.
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