From sash to tilt-and-turn
Many houses in the centre of Leiden still have old sash windows, with counterweights inside the frame. We can take them out, repair them and make them run smoothly again. It takes a day per window, but then you have windows that open and close again.
Sealant, glazing beads and double glazing
If we replace the glass with double glazing, you get new glazing beads and a sealant joint that lasts another ten years. In listed buildings we use slim heritage glazing, so the old glazing bars can stay.




