Triple vs double glazing – what’s best value for money?

Interior view of a Residence 9 window

Colder countries like Scandinavia & Canada have been utilising triple glazing within their architectural designs for decades. As more British homes demand sufficient insulation against heat loss, we are experiencing a noticeable rise in enquiries from Hertfordshire, Middlesex & London homeowners regarding triple glazing upgrades. So, we thought we’d clearly collate the facts below to help you make an informed decision on which glazing option is right for you and your family this year.

Double glazing – The facts

  • The average heat lost from single pane windows is around 33% (one third)
  • Average u-values for single glazing is 5.8, whereas double glazed u-values begin around 1.2Wm2K
  • Average energy savings of £110-115 per year
  • Able to reduce up to 50% heat loss
  • Weigh less than triple glazing, putting less strain on your home
  • Protection from break-ins is doubled

Triple glazing – The facts

Timber casement windows

  • The average heat lost from old double-glazed windows is around 20%
  • Triple glazing can achieve impressive u-values as low as 0.8
  • Triple glazing is approximately 40% more energy efficient than ‘A’ rated uPVC double glazing
  • Additional weight makes triple glazing incredibly durable and therefore longer lasting
  • Triple glazing eliminates around 15-20% more noise than double glazed windows
  • Protection from break-ins is tripled

Double & triple glazing in conservation areas

Don’t forget, if the property you wish to renovate is located in a conservation area, restricted by an Article 4 direction and/or is a listed building you may need to seek planning permission to upgrade to double or triple glazing.

Triple glazing vs double glazing – is it worth upgrading?

In conclusion, double glazing is the ideal choice for homes restrained by budget – especially those that contain inefficient single glazing. Whereas triple glazing is the perfect option for homeowners who want the most thermally sound building possible, to create a much more comfortable & peaceful atmosphere overall. If either of these high-performance options are of interest, get an instant online quote on double or triple glazing today.


Over 11,000sq ft of space with of 6000 sq ft of purpose built showrooms, one of the largest home improvement showrooms in the North London, Hertfordshire and surrounding counties. With state of the art displays and kids area all under one roof.

Opening Hours: Monday – Friday 09:00 – 17:00 Saturday 10:00 – 16:00 Sunday 10:00 – 13:00


Smaller showroom with limited range available but good for client convenience.

Opening Hours: Monday – Friday 13:00 – 17:00 Saturday 10:00 – 16:00 Sunday By Appointment Only

Contact Us

Cobury House, Unit 1
11 Pindar Road
Hoddesdon, Herts
EN11 0BZ

189 Chase Side
Enfield, Middlesex

Tel: 0208 366 6500


Latest News


Book an Appointment

Get in touch with us with your preferred date, and we'll get back to you and confirm everything with you.

Request a callback


Buy now pay later