New Technology ultraclear
Self-cleaning Double
Glazed Units
Light Transmission
(Vision Clarity) 85%
Self-cleaning Double
Glazed Units
Light Transmission
(Vision Clarity) 75%
Currently nearly all double glazed units are
constructed with Low E glass (low emissivity) which
has a noticeable tint. Our new Ultra Clear Low E
Units reduce the visible tint effect and increases the
Daylight/ Solar Factor and in appropriate conditions
may reduce the heating energy requirement.
SlimLite Standard

0131 551 2931
Slimlite Double Glazed Units
Certification - U Values
Sound Reduction & U-Values
Timber Windows
Sash & Case
Reproduction Crown Glass
Construction Guide

Further Information
Emissivity Glass
Glazing Method
Self Cleaning Double Glazing
Warm Edge Technology
Insulation U-Value
Heat Loss - Timber Windows
Building Regulations
Standard Double Glazed Units
Kevin McCloud - Period Drama
Solar Factor
Breakdown or Misting
Inert Gases
Glazing Bar & Astragal Detail

Timber Windows

house-frontageTimber provides one of the best insulation values of any material used in the construction of a window and has been used extensively over the last hundred years. Unfortunately it is not maintenance free, hence the surge in U.P.V.C. windows.

Most timber windows in the past and even recently have been single glazed because of the inability of bulky standard double glazed units with 10mm deep perimeter seals to be glazed into timber windows particularly with astragals and not acceptable by Planning Authorities for Conservation, Listed or Graded buildings.

This new innovative Slimlite Ultra Clear Self Cleaning Double Glazed Units open up many possibilities for the timber manufacturer of windows.

It is no longer necessary to apply adhesive astragals to a standard double glazed unit to effect a ‘Georgian Look’ as Slimlites will fit into the rebates of an astragal which usually has a 7mm rebate depth, which prevents the 5mm overall perimeter seal being visible and a rebate astragal width of around 20mm which can accommodate a Slimlite overall thickness of 12mm with a front putty or bead of around 6mm or more. (Pilkington UK Technical Bulletin Ref M17 Date 13th October 2011)

There is of course enormous potential in the replacement of Slimlite into single glazed windows, as Slimlite will fit into most single glazing rebates.However in England some single glazed timber windows tend to have smaller rebates than in Scotland and it may be necessary to router 2mm or 3mm from the rebate without detracting from the physical appearance of the windows.

Most timber windows constructed for single glazing would have rebate depths of at least 7mm and glazing width rebate of approximately 20mm (see sketch).

New technology Slimlite Ultra Clear Self Cleaning Double Glazed Units with a 5mm perimeter seal depth and overall thickness of 12mm, can be glazed into most single glazing rebates or new timber windows which are manufactured to maintain the slim astragal appeal. When Slimlite Ultra Clear Self Cleaning Double Glazed Units are glazed into a timber window, they are undetectable unless from close up examination.

Given the Governments drive to reduce carbon dioxide emissions, Planning and Conservation Authorities should consider the use of Slimlite Ultra Clear Self Cleaning Double Glazed Units in Conservation and Listed or Graded Buildings as there is no change to the physical appearance of a window, but provides serious reduction in energy requirement and therefore reduction in carbon dioxide emissions.