A big concern for many people is how energy efficient their home is and when you are adding an extension, this can be a big worry. With oak framed extensions, there is a lot you can do to make the structure insulated and energy efficient without spoiling the look of things. For example, insulation is achieved using external insulation panels that are wrapped around the frame to make the space well insulated.
The use of high quality double glazing in any windows and doors also adds to the energy efficiency. You can even consider looking to add a ventilation and heat recovery system that can help save some of the energy used and recycle it back to cut down on energy waste. In fact, there was recently the first official Passivhaus oak framed home constructed in the UK which shows what standards can be reached with this type of structure.