Transform your home with our
Thermotec Replacement Conservatory Roof
At Spire Windows, we offer thermotec roofing to improve the performance of your conservatories and extensions to create a room that you can make the most of.
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Thermotec Conservatory Roof
If your conservatory creates irregular and uncomfortable temperatures, then you may not be utilising your space wisely. Thermotec is an excellent investment to transform your outdated and underperforming conservatory into a room you and your loved ones can enjoy all year round. When you install a thermotec roof, you get the benefits of a lightweight yet strong aluminium insulated panel system that is highly energy efficient whilst remaining extraordinarily stylish and sleek.
Our expert team will transform your old, poorly insulated conservatory roof with our stunning, highly energy efficient thermotec roofs that can be enjoyed all year round whilst providing excellent customer service and high performance products. Our impressive functionality is reflected in our 10-year guarantee and 40-year life expectancy. We use industry leading materials to ensure that our products last a long time. At Spire Windows, we have over 10,000 successful installations, so you can have peace of mind that your project is in safe hands.
Become our next project by getting in contact with our helpful team or requesting a free quote using our online quoting engine.
Ready to transform your home?
Need some inspiration?
Get your inspiration and ideas from Spire customers who have transformed their homes.
Our inspirations portfolio is the perfect taster of all the amazing home improvement choices we have to offer.
Conservatory Case Study
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Visit our showroom
If you’d like to see our designs up close, you’re always welcome at our Louth showroom.
Located next door to our factory, our showroom features a range of our windows, doors, conservatories, and Thermotec roofing. Feel free to discuss your requirements with our helpful team, or simply enjoy browsing.
"The entire team were totally professional from start to finish. Ultra friendly and comprehensive in their systems. Fitters loved a bacon bun too"
"From start to finish we had outstanding customer service. I can honestly say the best of the best windows and doors I’ve seen from spire windows. I’m not just saying this but the quality of each window is outstanding and the 2 men that fitted Ian and Bernard worked extremely hard to get our windows and doors fitted in 4 days they fitted 10 windows and 2doors front and back. Both men were friendly , honest and polite . If you are thinking of getting new windows ,doors etc I can recommend Spire Windows in Louth"
"Very professional from start to finish. From our first visit and quote to the installation of our windows and door. The timeline was pretty much as quoted and the two installation technicians, Paul and Correy, were very good, professional and respectful of our property. Thank you."
"Excellent service from start to finish. Really tidy workers no mess and very efficient all of them .would certainly recommend this company"
"Had 10 windows and 3 doors fitted by Spire. From the initial meeting with Peter to the installation everything was explained in detail professionally. No hard sell like other companies just a fair price for great quality windows. The installation team were friendly, hard working and tidied up after themselves despite some very challenging weather."
The Spire difference
The 
difference
We treat you like you’re a part of the family. Aggressive selling, false promises, hidden charges? Nope! You don’t get any of that nonsense here. Just open, honest, straightforward and friendly service from a family-run team that truly cares.
Design visit
Once we’ve received your enquiry, we’ll arrange for a surveyor to visit your property. They’ll answer your questions and provide you with a quote.
Technical survey
An experienced surveyor will visit your home to conduct the final checks and take measurements for the manufacturing process.
Bespoke UK manufacture
We create made-to-measure products for your home on-site at our Louth factory. If you’d like to see our factory, why not pay us a visit?
Installation
Our experienced local fitters will complete the installation, minimising disruption to your daily routines.
Aftercare
We’ll provide a follow-up call to ensure you’re 100% satisfied. We also offer a 10-year, in-house guarantee.
Why our Replacement Conservatory Roofs?
Upgrade your conservatory with a Thermotec replacement roof designed for comfort, efficiency, and long-lasting performance
All Year Round Space
A thermotec roof is perfect for keeping the temperature of your space regulated all year round. No matter what season we want you to feel comfortable; our thermotec roofs come with unique aluminium panels that are filled with insulation to create a controlled temperature.
Stylish Appearance
Our thermotec roofs don't compromise on style. Spire Windows can create a bespoke thermotec roof that smoothly integrates into your existing home's appearance.
Thermotec Conservatory Roof Gallery
Here's some of our most frequently asked questions...
How much does a Thermotec replacement roof cost?
Upgrading to a Thermotec roof is one of the most cost-effective ways to revitalise an existing conservatory. Because these lightweight, insulated panels are designed to fit directly into your existing conservatory rafters, the installation is significantly more affordable – and much faster – than a full structural extension. At Spire Windows, we manufacture our own bespoke solutions, allowing us to provide high-performance roof upgrades that meet most budgets. While the size and specific panel requirements affect the final price, our design team will help you achieve a high-spec, modern finish that saves you money on both installation and future energy bills.
Will a Thermotec roof improve my home’s value?
Absolutely. A conservatory that is “too hot in summer and too cold in winter” is often seen as a liability; a Thermotec upgrade turns it back into a valuable asset. By providing industry-leading thermal insulation, you create a legitimate, year-round living space that potential buyers will view as a functional room rather than a seasonal porch. Spire Windows specialises in these designer upgrades, ensuring that the sleek, modern appearance and enhanced usability “tick all the boxes” for increasing your property’s overall market appeal.
Do I need planning permission for a Thermotec upgrade?
In the vast majority of cases, no. Because a Thermotec replacement roof utilises your existing conservatory structure and is remarkably lightweight, it typically falls under “Permitted Development” rules. This makes it a fast and convenient way to extend the life of your home without the stress of formal planning applications. However, every property has its own unique context, so Spire Windows always recommends a professional assessment. If your specific project did happen to require permission, our team is fully equipped to manage the process for you.
Is Thermotec the best choice for my conservatory?
If you want to transform an unusable, draughty conservatory into a comfortable, quiet sanctuary without the upheaval of a full rebuild, then Thermotec is the best choice. These panels offer exceptional U-values, keeping your room cool in the summer and cosy in the winter. Because we manufacture our own systems, we offer a variety of colours and finishes to ensure the roof complements your home perfectly. While we also offer tiled or high-performance glass options, Thermotec provides a unique blend of rapid installation and ultimate thermal performance – truly making your conservatory a “room for all seasons.”