The original cost-effective Garden Room system offering superior insulation, energy efficiency, and long-lasting durability.
We're so confident in our work that we provide all our clients with a 10 year guarantee following our installation.
We supply high-quality, bespoke products so you can customise to your own preferred taste and style.
With over 25 years of industry experience, we value our customers feedback and aim to leave all our customers 100% satisfied.
Rating: 9.87 / 10
Reviews: 131 | Location: Stevenage, Hertfordshire
Member since: August 2017
Discover a smart and affordable solution for new garden rooms and replacements. We provide competitive pricing without compromising on quality.
Designed for quick and easy installation with minimal site disruption, our garden rooms are:
We offer a wide range of uPVC windows, fully customisable and with many different colours, styles and accessories available. All our window products have an energy efficiency rating of A+12.
Our doors range from uPVC doors, composite front doors, aluminium bi-fold doors and french doors. All of which are fully customisable and can be tailor made to suit your home. 100% safe and secure. Find your door online today.
Interested in expanding your home to create more living space? A conservatory or orangery might be the way to go. We have a wonderful range of stylish designs both traditional and modern to suit all homes.
Our systems are designed for fast installation with minimal disruption, so you can enjoy your new space sooner.
We manage all building control matters in-house, ensuring your project is fully compliant.
Choose from a wide range of shapes, finishes, lighting, and roof window options to suit your needs.
Every installation comes with a 10-year manufacturer warranty, giving you complete peace of mind.
Want to upgrade your glazed conservatory roof or transform your living space into a year-round retreat? Our Warm Roof System is the latest innovation from Sheertherm Manufacturing. Designed for homeowners who expect more from their space, it combines outstanding insulation, a sleek solid-roof finish, and enhanced comfort in every season.
Looking for an affordable way to install or replace a garden room? Our Garden Room System offers competitive pricing without cutting corners on quality. Quick to install and designed to minimise disruption, it’s a fully insulated, versatile solution ideal for both homeowners and trade projects.
Have questions about our products or installation process? We’ve put together answers to the most common queries, from building control approval to customisation options, so you can feel confident before starting your project.
When we deliver your roof to site, the only extras needed are fixings to attach it to the house wall, lead flashing, and plaster to finish inside.
Yes, our systems are designed to meet or exceed building regulations.
Superior insulation, rapid installation, and a clean solid-roof aesthetic.
Yes — we have a selection of tile styles and finishes.
Yes — and we handle submissions in-house where required.
Rating: 9.87 / 10
Reviews: 131 | Location: Stevenage, Hertfordshire
Member since: August 2017




We’re here to help with any questions about our garden rooms, warm roofs, or installation process. Whether you’re a homeowner looking for inspiration or a trade partner ready to get started, our team is only a message away.
Phone: 01438 861617