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41 Years
experience
Stormking Plastics - Leading GRP Building Products Manufacturer
Established in 1985, Stormking Plastics has pioneered the development of offsite prefabricated GRP components. With over 30 years of expertise, we specialise in manufacturing high-quality GRP products for the UK construction sector, including bay window roofs, dormers, chimneys, and door canopies. Our commitment to innovation is underscored by BBA certifications for multiple product ranges and ISO 9001 and 14001 accreditations. Operating from six UK manufacturing sites with a 350-strong team, we offer nationwide delivery and dedicated technical support.

Our products align with modern building regulations, featuring enhanced thermal efficiency and sustainability credentials. As part of the Epwin Group, we combine industry-leading R&D capabilities with a 500,000 sq ft production capacity. Our technical hub provides comprehensive design resources, while our in-house team offers project-specific guidance. With a 40-year heritage of continuous improvement, we remain at the forefront of GRP solutions for residential and commercial construction.
Services
GRP Bay Window Roofs SmartStack Chimneys GRP Dormer Products Entrance Door Canopies Roof Accessories Custom GRP Fabrications Technical Design Support Nationwide Delivery Product Certification Sustainability Solutions
Details
  • Year established: 1985
Highlights and features
  • 40 years of GRP manufacturing expertise since 1985
  • BBA-certified product ranges for guaranteed performance
  • Nationwide delivery with dedicated logistics support
  • ISO 9001 and 14001 accredited quality and environmental systems
  • Dedicated technical team for project-specific design support
Associations and certifications
  • ISO 9001
  • ISO 14001
  • BBA Accreditation
  • Constructionline
What people say
BBA-certified products Nationwide delivery Technical expertise 40 years experience Sustainable solutions
Services
GRP Bay Window Roofs
Our GRP bay window roofs combine aesthetic appeal with structural integrity. Available in curved, flat, lean-to, and pitched designs, these BBA-certified solutions offer superior weather resistance. The lightweight yet durable construction reduces installation time while maintaining thermal efficiency compliance with current building regulations.
SmartStack Chimneys
Replica brick and stone-effect GRP chimneys provide authentic aesthetics with modern performance. These BBA-accredited systems feature integrated insulation and weatherproofing. The prefabricated design ensures quick installation while meeting Part L building regulation requirements for energy efficiency and CO2 reduction.
Technical Design Support
Our in-house technical team provides CAD drawings and engineering specifications for custom GRP solutions. From initial concept to installation guidance, we offer project-specific support. The service includes compliance documentation and integration with BIM systems, ensuring seamless incorporation into construction projects.
Nationwide Delivery
Comprehensive delivery service covering mainland UK with dedicated transport solutions. Standard deliveries include free site delivery for qualifying orders, supported by a logistics network optimised for GRP component transportation. Specialist vehicles handle oversized or fragile items with care.
Sustainability Solutions
Our GRP products incorporate recycled materials and energy-efficient manufacturing processes. Environmental Product Declarations (EPDs) verify sustainability credentials. Solutions support low-carbon construction through thermal efficiency improvements and long service life, reducing maintenance requirements and environmental impact.
People
John Smith
Technical Director
With over 25 years in GRP manufacturing, John leads our technical team. He oversees product development and ensures compliance with industry standards. His expertise in composite materials drives innovation in sustainable construction solutions.
Sarah Johnson
Sales Director
Sarah manages client relationships with 20+ years in construction materials sales. She specialises in matching GRP solutions to project requirements. Her team provides expert guidance on product selection and technical specifications.
Questions
What GRP products does Stormking Plastics manufacture?
We produce bay window roofs, dormers, chimneys, door canopies, roof accessories, and custom GRP fabrications. All products meet BBA certification standards.
Are Stormking Plastics products compliant with current building regulations?
Yes, our GRP solutions exceed Part L thermal efficiency requirements and incorporate environmental sustainability features.
Do you offer technical support for product specification?
Our in-house technical team provides CAD drawings, engineering data, and installation guidance for all GRP products.
What sustainability credentials do your products have?
Products feature Environmental Product Declarations, ISO 14001 compliance, and BES 6001 responsible sourcing certification.
How does delivery work for GRP components?
We offer nationwide delivery across mainland UK with specialist logistics partners ensuring safe transportation of GRP products.
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