Solutions for Single Glazing

Pilkington Spacia™

Pilkington Spacia™

Advances in technology have made windows a significant contributor to the energy efficiency of new homes. Further advances mean that the benefits of energy efficient glazing can be extended to help preserve the character of our nation’s older buildings.  Restrictions on permissions can prevent certain property styles from changing away from energy inefficient single glazing. Both old and new homes, commercial and public buildings need the benefits derived from energy efficient glazing for carbon reduction, reduced fuel bills and comfort.

How it works

Advanced Pilkington Spacia™ technology consists of an outer pane of low-emissivity glass and an inner pane of clear float, with a small vacuum between the panes rather than relatively conductive air or gas. The result is excellent thermal performance from an insulating glass unit under 7mm thick.

Protection cap

The vacuum creation process in Pilkington Spacia™ necessitates an extraction hole in one of the panes, located 50mm from the glass edge. This hole is covered by a small permanent cap (12mm diameter), which remains on the glass surface and glazed towards the inside of the building. This can be positioned in any
corner of the pane to suit the window design.

Microspacer grid

The glass is kept apart with a grid of fine pins with a diameter of only 0.5mm.


Pilkington Spacia™ uses a completely different edge seal technology for maintaining the vacuum.  Many of the compatibility considerations associated with conventional IGUs are avoided.  It can even be glazed in some putties to achieve the original look of fine timber glazing. Even the rebate depth can be reduced due to the slim edge detail that only requires 10mm of edge cover.

A cost effective method of improving the energy efficiency of either older homes where glazing choice is restricted or where the original frames are a desirable feature or modern buildings where low weight and high levels of light transmission are required.

We provide an extended warranty of 10 years for this product as standard to our customer.

Pilkington Spacia™ provides the opportunity for older properties to contribute to national efforts to reduce carbon and provide all the benefits of modern glass products to the occupier. 

  • Offers good acoustic performance for lower interior noise levels
  • Can be supplied as non-rectangular shapes, for flexibility with original frames
  • Proven solution; successfully used in Japan for over a decade
  • Provides a  reduced risk of internal condensation compared to single glazing
  • Max size: 2,400mm x 1,350mm Min size: 350mm x 200mm

The price and delivery vary with the quantity ordered. Generally goods are dispatched from Japan by sea, keeping the carbon footprint as low as possible. You should allow for a 10 week lead time for installation.