Our Insulated doors help regulate temperature and reduce energy costs, making them an eco-friendly choice for homeowners.
Experience improved comfort and noise reduction with our Insulated garage doors, perfect for homes with living spaces above the garage.
Our team can install your new Insulated door quickly and efficiently, ensuring minimal disruption to your daily routine.
We offer a range of customisation options to suit your preferences and requirements, ensuring a perfect fit for your home.
Made from high-quality materials, our Insulated doors are built to last and provide long-lasting performance.
Choose from a variety of finishes and colors to match your home's exterior and enhance curb appeal.
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Warm, quiet, secure — with convenient walk-in access.
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The perfect sectional door for garages with limited headroom.
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An insulated garage door uses a double-skin construction with a foam core, typically achieving U-values between 1.0 and 2.0 W/m2K. A standard single-skin door sits at around 6.0 W/m2K or worse.
If your garage is attached to your house or sits beneath a bedroom, this difference is significant. Heat escapes through the garage wall into adjacent rooms, forcing your central heating to work harder. An insulated door acts as a thermal barrier, keeping more heat where you want it.
For detached garages used purely for parking, the benefits are smaller but still noticeable. Insulated doors are quieter, more rigid, and resist denting far better than single-skin alternatives.
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Read our honest guide or talk to our team.
offer the best insulation values, with premium models from Hormann achieving U-values as low as 1.0 W/m2K. The multi-panel design seals tightly on all four sides.
use insulated slats that coil above the opening, saving space while still providing good thermal performance. Ideal where headroom is limited.
are available with insulated composite panels, combining traditional appearance with modern thermal efficiency.
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Book a free survey and we will measure up and advise.
The premium for insulation is typically £500 to £1,000 over the equivalent single-skin door. For attached garages, the energy savings alone can recoup this within a few years, particularly as energy costs continue to rise.
Insulated doors also last longer. The double-skin construction is inherently more rigid, resisting panel flex and denting. Many insulated doors from manufacturers like Hormann and Garador carry warranties of 10 years or more.
On top of that, a quiet, well-insulated garage door adds genuine value to your property. It is a visible upgrade that buyers notice and appreciate.
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See what our customers say about their experience with us
4.8/5(62 reviews)
10.0/10(319 reviews)
4 months ago
We recently had a new electric door fitted to replace a very old up and over type. From the initial enquiry to final installation the team have been an absolute pleasure to deal with. On the day of the installation the guys turned up promptly and completed the work with the utmost care and attention to detail. I would most definitely recommend them to anybody who is looking for a new garage door.

March 2024
Excellent from the survey with Tom to the final payment with Sonya Good price, very good door, work force very helpful knew their job , Definitely recommend

5 months ago
We are delighted with our new Roller Garage Door supplied by GDCG. The whole process has handled in a professional and friendly manner with relevant information and advice given but with no unwanted pressure. The home survey & visit to the Grantham site to view the product allowed us to confidentially place an order and the installation was on time and could not have gone more smoothly. We will certainly recommend GDCG to anyone looking for a quality Garage Door.

March 2024
These guys are some of the best tradesmen I have ever used. Extremely polite and courteous they fitted the motor in a garage that does not have standard roofing beams utilising their experience and ability to resolve the issue. I would have no hesitation in recommending their services.

2 years ago
From start to finish the service TGDCG provided was spot on. Professional throughout, they listened to my requirements and recommended an ideal solution to replace my existing garage doors. They made my decision easy, having spoken to a number of other firms, as they beat everyone else on price, friendliness and product. Absolutely delighted with the new sectional doors, they look fantastic and work a treat, and it was nice to see the old metal doors and rotting frames all gone. I love working with companies like this, you can just tell everyone who works at TGDCG enjoys their work and values their colleagues.

February 2024
I can’t fault the quality of the service. Excellent product. Friendly and helpful team. All went to schedule as promised. Highly recommend.

February 2024
Quality of work good' in short time, plus price charged in correct area of expectance.

January 2024
I could not have had two better chaps to have done the job, worked hard, very professional, left everything nice and clean when they left, very polite, well done Grantham Garage Door Company would recommend you.T

November 2023
Excellent service from the office support to the engineers prompt and professional workmanship

November 2023
John turned up when we expected him. Explained exactly what needed doing and completed the job in a professional and timely manner.

October 2023
The company returned to secure some brackets that had come loose. Tuned up no time and completed the job promptly. Great communication from Andrea and workman very polite and professional

October 2023
Always on time Courteous and knowledgeable Reasonably priced Would always recommend

September 2023
I phoned the Garage Door Company Grantham, as our garage door would not open. From start to finish the Garage Door Company , were so helpful. They came out within a couple of hours from my call and repaired our garage door. Everyone I spoke to and the two men who came out, were polite, professional extremely helpful.

August 2023
Excellent service from start to finish , polite and informative with excellent advice . Excellent workmen clean ,tidy and professional job. Very competitive price and speedy service . Highly recommend

August 2023
Very easy to deal with and at a good price Very happy

July 2023
Excellent product and installed properly including steel frame direct to brickwork, no painting or maintenace required.

July 2023
Reasonable price, good service and satisfied end product. Recommended.

June 2023
The installers arrived when they said they would and worked quickly and efficiently. They were polite and courteous gentlemen who explained the workings of the doors, tidied up afterwards and left us feeling confident that an excellent job was done. I would recommend them every time.

June 2023
Originally a first class installation and this was a two year service also very well done. A good company to deal with.

June 2023
Service completed very efficiently. Gentleman explained what he was doing, answered my questions and was very helpful and polite
Discuss your needs with our experts and schedule your free survey so that we can turn your vision into reality.
We are proud to be accredited by the following industry bodies
Connect with us today to find the perfect solution for your home.
Personalise your door with a wide range of colors and finishes.
Trust our skilled team for seamless and secure installation.
All doors come with a warranty for peace of mind.
Helpful guides for garage doors
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Should you pay extra for an insulated garage door? Practical advice on U-values, costs, and when insulation is genuinely worth the investment vs when to skip it.
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Everything you need to know about electric garage door openers, from choosing the right system to retrofitting an existing door. Practical advice on automation, remotes, and safety.
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Compare sectional, roller, up and over and side hinged garage doors. Understand the pros and cons of each type to find the right garage door for your home and budget.
62 reviews
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