Classic – Standard double glazing
Classic – Standard double glazing
Classic double glazing
The basic upgrade from single glazing, providing more than double the heat retention in your home
For warmth and those who want clear glass and ample natural light in your home.
Up to 52% better heat retention than single glazing, making your home warmer and drier in winter.
Clear glass - providing 81% natural light when compared to single glazing which lets in 90% of natural light.
Classic double glazing - Performance data
Make-up mm | Heat loss | Visibility | Heat gain | Fading |
|---|---|---|---|---|
Ug | VLT (Visible light transmission) | SF | Tdw-ISO (Damage weighted transmission) | |
4-12-4 | 2.8 | 81% | 77% | 0.74 |
4-10-4 | 2.9 | 81% | 77% | 0.74 |
4-8-4 | 3.1 | 81% | 77% | 0.74 |
View our technical double glazing range brochure below
Our sustainability journey
Our double glazing Low E glass is Declare Label Certified (Red List Free), which means they contain no toxic ingredients.
Classic compared to single glazing
Keeping my home warmer
Up to 52% better heat retention
Brighter and lighter home
Lets in 81% of natural light
Classic™ performance
This data is based on a 4-12-4 make-up
Terminology defined:
U Value: Lower is better
SF: Lower means less solar heat
VLT: Higher means more natural light
Tdw-ISO: Lower means less fading
U value (based on 4-12-4)
2.8
Solar Factor (SF)
77%
Visible light transmission (VLT)
81%
Fading protection (Tdw-ISO)
0.74
View our range
CHRISTMAS & NEW YEAR HOLIDAY CLOSURE: All Retrofit branches will be closed from 12pm Friday 20th December, returning Monday 13th January. Have a safe & happy holidays!
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