If your loft experiences extreme temperatures, it is mostly because it was not properly insulated. This may be the result of using cheap or substandard materials. A new loft conversion which is built correctly ought to be thermally efficient. Clifton Hill & Montpelier Loft Conversions ensures that the external roofing is insulated with loft wool and covered with thermawrap. This keeps your loft cool in the summer and warm in winter.