Here’s a great example of our double glazed sash window upgrade. The customer wanted to retain the original features while making their home warmer and more secure. We restored the original box frames and then installed our Accoya wood double glazed sashes. These sashes are manufactured to match the original single glazed sashes exactly while benefiting from high performance double glazed units and a factory finished spray system. These windows are now draught free, operate correctly and keep the cold out.