As standard you will receive an ultra efficient ‘A’ rated window. Our latest casement windows utilise some of the most advanced double glazing on the market. Our windows easily exceed building regulations so you will have the peace of mind that you are installing the very best double glazing.

The eco energy plus window system has achieved a BFRC (British Fenestration Rating Council) Window Energy Rating of ‘A’, the highest achievable.

The eco energy plus window system uses it’s multiple chambers to lock in the heat, and high performing bubble gasket seals to ensure there are no gaps for heat to escape.


Ian Black

First class work. Easy to deal with. Beautiful door. Highly recommended.

July 1, 2021

Debra Manclark

Absolutely delighted with work carried out which included facias, soffits, guttering, 2 bays and 4 windows. The team were professional, punctual, polite, tidy and work has been carried out to an exceptionally high standard. Contact and communication with company has been flawless. I cannot recommend highly enough, one very happy customer here!

June 1, 2021

Fraser Wood

“I approached a few companies about getting a new window fitted in the kitchen, speaking with SDG it was clear that the reason the previous owner had not upgraded to double glazing was because the door shared a frame. I was quoted for a new window and door which seemed a reasonable price compared to other companies. The team that came round to install them were great, the install date was even brought forward by a day. A very high standard of work and even the whole area indoors and out was left spotless. Great to work with from initial quote, survey to install.

June 16, 2021


Our builder used SDG when he completed our extension so it was a no brainer when we wanted 8 new replacement windows for our home. Excellent on the day of installation. Great value for money. Really friendly service. Would always recommend.

June 14, 2021

Robert Newton

Can’t recommend Sidcup Double Glazing enough, there was no hard sell a reasonable price and a great service from start to finish.

June 10, 2021

Linda Taylor

I can’t rate this company enough, from the start to the finished job it was smooth and professional. The lads were great workers and a great quality finish with their work. They have been very helpful and made sure I was completely satisfied before payment requested. I would recommend them fully. They work best when supplied many cups of tea 😉

June 3, 2021