Window Efficiency

A windows efficiency is actually down to all the parts that go to make the whole window. The window frame is actually a heat conductor and this is a factor also that will contribute. London Glazing tradesmen are experienced in all glass. This is applicable also for the windows U-factor. This U-factor is the rate at which a window will allow heat to flow through it. Referring to windows, skylights, and glass doors, the U-factor can just be applied to refer to just the glass or glazing on its own. The less the U-factor, and the effective the window, door, or skylight. the most important consideration is how the window actually works, because some types have a lower rate at which air can leak air than others, this improves your home’s energy efficiency. London Glaziers fit all types.

Hopper.
Hinges at the bottom and opening in. Just as with both awning and casement windows, these usually have low air leak rates as the sash shuts by pressing against the frame.

Single and Double-Hung.
Each of the sashes moves vertically in a double-hung window. The bottom sash is the only one that slides up in a single-hung window. These sliding windows generally have high air leak rates than projecting or hinged windows.

Single and Double-Sliding.
Each sash moves horizontally in a double-sliding window. There is only one sash that slides in a single-sliding window. As with single and double-hung windows, they usually have high air leak rates than projecting or hinged windows.

Awning.
Uses hinges at the top and opening out. Because the sash closes by pushing against the frame, they usually have low air leaking rates. Lower than sliding windows.

Casement.
Hinged on the sides. Look similar to an awning window, they generally have lower air leakage rates than a sliding window as the sash shuts by pushing against the frame.

Fixed.
Fixed panes that will not open. Once installed properly these windows are airtight, however, they are not suited in areas where window ventilation is required.