Masterframe is a specialist fabricator of heritage-style PVC-U sash windows, producing the most authentic sash windows on the market for the last 31 years. For the last 10 years, Masterframe has used SWISSPACER warm edge spacer bars inside its sealed units.

The company manufactures four styles of sash window, from the competitively priced Imperial Collection, through to the Vintage Collection which is ideal for conservation areas and restoration. All styles use SWISSPACER for unobtrusive warm edge excellence, helping Masterframe meet their specification requirements. Masterframe use SWISSPACER ULTIMATE in both white and black, in sizes 8, 10, 14 and 16mm.

Ramon Rabett, Technical Director at Masterframe comments: “SWISSPACER is ideal for fulfilling the PSI values, and is a ‘hidden’ component that helps our windows achieve ‘A’ and ‘A+’ energy ratings easily and effectively.

“In addition to contributing to excellent thermal specifications, with SWISSPACER we can also fix internal duplex bars to recreate an authentic Georgian look and we can bond our applied Georgian bars onto the surface of the glass using our patented Georgie® clips.”

To learn more about SWISSPACER visit For more on Masterframe visit


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