Secondary Glazing Glass & Glazing Options
Standard Secondary Glazing Glass
4mm clear float glass is the standard for all secondary windows except Tilt In Balanced Vertical Sliders, for which the standard is 4mm clear float toughened safety glass - to comply with Safety Glazing requirements.
In both cases, good secondary glazing thermal insulation is created as well as some acoustic benefit, but not as much as would be gained by specifying Low E or sound proof glass.
Secondary Glazing Glass Options
The following patterned, obscure, safety, thermal and acoustic glass & glazing options are also available, where:
H - Denotes Heat/Thermal Insulation Glass
S - Denotes Safety Glass
N - Denotes Noise Insulation/Sound Proof Acoustic Glass
O - Denotes Obscure or Patterned Glass
For obscure, textured & etched glass options, please see the Pilkington Brochure 
Glass:
| 4mm Clear Float the Standard | H |
| 4mm Clear Low "E" Pilkington K Float | H |
| 4mm Clear Low "E" Toughened Pilkington K Float | HS |
| 6mm Clear Low "E" Pilkington K Float | HN |
| 6mm Clear Low "E" Pilkington K Toughened Float | HSN |
| 6mm Clear Float | HN |
| 4mm Obscure Patterned Sheet | HO |
| 6mm Obscure Patterned Sheet | HNO |
| 4mm Sandblasted Float | HO |
| 4mm Sandblasted Toughened Float | HSO |
| 6mm Sandblasted Float | HNO |
| 6mm Sandblasted Toughened Float | HSNO |
| 4mm Acid Etched Float | HO |
| 4mm Acid Etched Toughened Float | HSO |
| 6mm Acid Etched Float | HNO |
| 6mm Acid Etched Toughened Float | HSNO |
| 4mm Clear Toughened Float | HS |
| 6mm Clear Toughened Float | HSN |
| 4mm Obscure Patterned Toughened Sheet | HSO |
| 6mm Obscure Patterned Toughened Sheet | HSNO |
| 6.4mm Clear Laminated | HSN |
| 6.4mm White Laminated | HSNO |
| 6.4mm Clear Laminated Stadip Silence Acoustic Glass | HSN |
| 6.4mm Obscure Laminated Stadip Silence Acoustic Glass | HSNO |
| 6 up to 15mm Clear Pyran or Pyroswiss Fire Resistant Glass | |
| Pyroswiss glass may be provided with surface finishes including acid etching, tinting, screen printing and patterned. | |
About Us
By choosing the correct glass for your individual requirements, we can produce:
- thermal secondary glazing the equal of replacement double glazing
- sound proof glass acoustic windows
- or an excellent combination of the two requirements!
As we are also General Glass Merchants and Glaziers, we stock and can obtain other specialist glasses - but please note that they may not be suitable for the secondary glazing range.
We also replace and re-glaze existing windows, so can fit acoustic double glazing and acoustic glazing if that is your preference.
Other:
- holes cut out for manual or electric ventilator fans
- flyscreens, please see the Product Specifications page
In line with our policy of continuous product improvement & development Secondary Glazing London reserves the right to alter any of the product specifications without notice.
Further information:
- See our Main Page for a brief overview of everything about Secondary Glazing
- Thermal secondary glazing Case Study
- Acoustic Soundproof Windows Case Study
Download our Secondary Glazing Brochure