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Endorsed by Which? Trusted Traders

Insulating Windows Ltd

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203 Reviews

Opening Hours
Today - 09:00–17:00
  • Monday 09:00–17:00
  • Tuesday 09:00–17:00
  • Wednesday 09:00–17:00
  • Thursday 09:00–17:00
  • Friday 09:00–17:00
  • Saturday 09:00–17:00
  • Sunday - Closed

What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?

Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check


As a Hertfordshire company we have proudly been servicing the local community for over 30 years fitting window, doors, conservatories and roof line products.

We also cover the Buckinghamshire and Bedfordshire area and have over 20,000 satisfied customers throughout the region. Due to recent growth the business has now expanded to cover Essex and Surrey.

We are a quality-focused company and we trust that you will be delighted with your installation, as a customer you will always be saying something about us, something good or bad, best part is we get to influence by delivering superior products and workmanship at affordable prices.

Please feel free to contact us or visit our showroom where we will be happy to discuss your requirements.

We sincerely hope that you will join our long list of satisfied customers.

What we do

  • Double glazing

    • Double glazing installation
    • Double glazing repairs
    • Double glazing suppliers
  • Conservatories

    • Conservatory Roof replacement
    • Hardwood conservatories and orangeries
    • Sun Lounge
  • Doors

    • ​Aluminium doors
    • Bi-fold doors
    • Composite doors
    • Door repairs
    • Front door
    • Orangeries
    • French doors
    • Timber doors
    • UPVC doors
    • Patio doors
  • Glaziers

    • Aluminium Windows
    • Double glazing installation
    • Double glazing repair
    • Sash windows
    • Timber windows
    • Triple Glazing
    • UPVC Windows
  • Blinds

    • Shutters
  • Renewable energy

  • More Services

    • garden room

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

203 reviews
Customer Service
Sort by
Excellent Service From Start to Finish
Customer Service
We contacted Insulating Windows to quote for supply and installation of a large number of doors and windows needed for a major refurbishment of our house after an unsatisfactory brush with a national window company. Grant visited the house and took a personal interest in the project throughout. The quote we received was very competitive and all the staff we dealt with were very customer focused and professional. Changes to the brief were taken in their stride and the need for multiple visits to measure the non-standard building construction (granite blocks) and to install the items around the wider building works was no problem. I have no hesitation in recommending Insulating Windows to any prospective customer.
Customer in Hertfordshire Posted on 26/04/2019 , work completed 30/11/2018
Satisfactory job
Customer Service
The windows were nicely fitted. Although the work could have been finished in two days rather than three. Clean and tidy workmen, but some damage to walls and doorways will need repair. Helpful workers who moved furniture when needed, but did cause damage to a chest of drawers that can't be repaired. Would be happy to recommend, although would ask for more care to be taken if they worked with us again. Can't fault the windows and the final effect.
Andrew, Hertfordshire Posted on 15/04/2019 , work completed 15/04/2019
Very professional
Customer Service
The fitters arrived on time. They used dust sheets where necessary. all work was carried out quickly and to a very high standard. They were polite and courteous at all times. Everything was finished and complete to our satisfaction. They cleaned up before they left. Overall a very satisfactory job.
Karen, Hertfordshire Posted on 08/04/2019 , work completed 08/04/2019
Good, tidy job.
Customer Service
Very attentive to detail. Very tidy and neat.
Emma, Hertfordshire Posted on 18/02/2019 , work completed 18/02/2019
Excellent work.
Customer Service
Arrived on time. Work completed quickly, cleanly and professionally.
Linda, Hertfordshire Posted on 13/02/2019 , work completed 13/02/2019
Prompt, professional, superb job.
Customer Service
We were having a replacement bedroom window and having had most windows, front porch, outside doors, patio doors, conservatory and gutters and large boards from them and always had good workman and service. We knew we couldn't go wrong.
Brian, Hertfordshire Posted on 13/02/2019 , work completed 13/02/2019
Customer Service
All work carried out was to a very high standard.
Alan, Hertfordshire Posted on 11/02/2019 , work completed 11/02/2019
Very helpful
Customer Service
Replaced door. very good work, on time and very helpful.
Garry, Bedfordshire Posted on 07/02/2019 , work completed 07/02/2019
Most impressed
Customer Service
Helpful, professional from first enquiry to completion. Most impressed with product and personnel.
Colin, Hertfordshire Posted on 06/02/2019 , work completed 06/02/2019
Excellent product installed under challenging conditions
Customer Service
Four upstairs windows were installed. The end result is excellent. The challenging weather conditions, -5c temperatures did not deter the two workmen who worked very hard for seven hours. The properties of the acoustic glass are immediately appreciated and welcome.
Customer in Hertfordshire Posted on 01/02/2019 , work completed 31/01/2019