Business Details
38 Years
experience
Your Trusted Partner for Glass Sealed Units in Leicester
Established in 1988, Cleartherm Ltd Glass Sealed Units has grown from a small operation producing 400 sealed units weekly to a modern facility manufacturing over 4,000 units weekly. Our Leicestershire headquarters utilise state-of-the-art technology, including automated IGU lines and glass toughening plants, ensuring precision and efficiency. We prioritise compliance with current legislation, offering products that meet minimum Window Energy Ratings of C and enabling clients to achieve A+/A-rated energy efficiency. Backed by ISO 9001:2015 certification and partnerships with industry leaders like Pilkington, we combine cutting-edge technology with a commitment to quality. Our team of experienced professionals delivers value-added services, ensuring traceability and rapid turnaround for diverse glass solutions.We maintain rigorous quality control through factory production systems and third-party certifications, including BSI Kitemark and CE marking. With over 2.5 million invested in advanced machinery, we provide durable, environmentally responsible glass products tailored to evolving market demands. Our focus on innovation and customer-centric service has solidified our reputation as a trusted supplier in the glass manufacturing sector. We operate from a 15,000 sq ft facility, offering comprehensive support for commercial and residential projects nationwide. Our dedication to continuous improvement ensures clients receive products that exceed expectations in performance and sustainability.
Services
Toughened Glass
Fire-Resistant Units
Obscured Glass
Leaded Glass
Georgian Bars
Stained Glass
Energy-Efficient Units
Details
- Year established: 1988
Highlights and features
- We have over 35 years of experience in glass manufacturing since 1988.
- Our ISO 9001:2015 certification ensures rigorous quality control standards.
- We use state-of-the-art automated IGU lines and glass toughening plants.
- We partner with industry leaders like Pilkington for premium materials.
- Our products meet current legislation for energy efficiency and safety.
Associations and certifications
- ISO 9001:2015
- BSI Kitemark
- CE Marking
- UKCA Marking
Services
Toughened Glass
Our toughened glass undergoes controlled thermal or chemical treatments to increase strength and safety. Ideal for doors, windows, and partitions, it resists impact and thermal stress. When broken, it crumbles into small, less harmful fragments, meeting BS EN 12600 standards for safety applications.
Fire-Resistant Units
Fire-resistant glass units provide critical protection by delaying fire spread in buildings. Compliant with UKCA/CE marking, they integrate into fire-rated doors and partitions. Tested to withstand extreme temperatures, these units offer 30-120 minutes of fire integrity, ensuring occupant safety and regulatory compliance.
Energy-Efficient Units
Our sealed units achieve Window Energy Ratings up to A+, reducing heat loss and carbon footprints. Using low-emissivity coatings and argon gas fills, they enhance thermal performance. Compliant with Part L building regulations, these units lower energy bills while maintaining acoustic insulation and durability.
Obscured Glass
Obscured glass provides light transmission with visual privacy through patterns or textures. Suitable for bathrooms, offices, and internal partitions, it combines aesthetics with functionality. Available in various designs, it meets safety standards when toughened or laminated.
Stained Glass
Handcrafted stained glass adds artistic flair to residential and commercial spaces. We offer custom designs using traditional leaded techniques or modern resin-bonded methods. Ideal for feature windows, doors, and partitions, it combines durability with timeless visual appeal.
Questions
What types of glass products does Cleartherm Ltd Glass Sealed Units offer?
We provide toughened, fire-resistant, obscured, leaded, stained glass, and energy-efficient sealed units with Georgian bars.
Are Cleartherm Ltd Glass Sealed Units's products compliant with UK building regulations?
Yes, all products meet current legislation, including Window Energy Rating C minimum and CE/UKCA marking requirements.
Do you offer custom glass solutions?
Yes, we manufacture bespoke stained glass and leaded units to client specifications.
What quality certifications does Cleartherm Ltd Glass Sealed Units hold?
We are ISO 9001:2015 certified with BSI Kitemark, CE, and UKCA markings for quality assurance.
