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You've asked, we've delivered!

The GRS-DUO-15 has been designed to prevent air leakage at pipework penetrations behind a radiator that is plumbed with 15mm flexible plastic barrier pipework.

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Interlocking Plain Tile Verge

Introducing the all-new Interlocking Plain Tile dry verge system, with its innovative split fixing plate and unique new eaves closure design.

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Proudly designed and manufactured in the UK

An extensive range of high quality products made at our Derbyshire manufacturing site using state of the art design, tooling and production skills.

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The 10mm GRS-DUO radiator pipe guide and seal ensures a quick and easy fit every-time. Offering improved positioning and fixing versatility along with a more robust seal to further ensure that air leakage behind every radiator is drastically reduced.

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The Bat Ridge Roost provides a habitable roost space for small crevice-dwelling bat species found in the UK.

Innovative & Award-Winning Building Products from Manthorpe


Manthorpe has been developing innovative building products for the construction industry for over 35 years.

Our comprehensive range of quality building products is designed to meet your every need, from groundwork to roofline, from new build to refurb. 

With extensive experience in the plastics industry, we have the expertise to manufacture virtually all our building products in-house and continue to invest heavily in new technology and cutting edge machinery and production processes.

This enables our team to be at the forefront of product development, driving industry progress through precision and innovation.


Discover Our Building Products

Manthorpe’s building product portfolio is comprehensive, multi-award-winning and ever-growing, with new product development ongoing within our in-house R&D Department.

Our product range covers roofing, floor and wall ventilation, cavity trays and barriers, loft access doors and a range of access panels, drainage and much more.

Browse the categories below to view our extensive range of building products:


British Made Building Products

Manthorpe is a well-respected designer, manufacturer and supplier of plastic injection moulded, vacuum formed and extruded products for the building industry.

The majority of our products are manufactured in the UK, providing our customers with full confidence in their high quality and robustness, and removing any supply chain concerns.

Manthorpe ensures that products are independently tested when required via independent testing organisations, such as Building Research Establishment (BRE) and Warringtonfire, to meet British standards and to achieve relevant accreditations.

Our close relationships with independent and national merchants ensure that our building products are available to purchase from a wide range of outlets throughout the UK.

Visit our contact us page to find details of your local Area Sales Manager, who can advise you of your nearest stockist.

Our Products

Manthorpe’s product portfolio is comprehensive and new product development is ongoing through our in-house R&D Department. Browse the categories below to view our extensive product range:

All Products

Comprehensive product portfolio & ongoing new product development through in-house R&D.

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Quality roof ventilation products to increase airflow and combat the build-up of high levels of condensation.

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Wall & Floor Ventilation

Ventilation products to provide airflow into the underfloor void, a breeding ground for mould and stagnant air.

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Cavity Trays, Closers & Barriers

Provide protection from water ingress below roof abutments and restrict the spread of smoke and flames.

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Loft & Access

Products designed for quick & easy entry into the roof space whilst providing an insulated barrier & air tightness.

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Rainwater & Drainage

Direct rainfall captured by the roof away from the building and drainage channels to prevent surface water build up.

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Prevent water ingress into homes & conservation products to reduce the impact of buildings within the natural environment.

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Air Leakage

Products designed to tackle heat & air leakage enabling house builders to achieve the targets for modern, energy efficient homes.

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From our first foray into the building industry through to our latest product innovations, Manthorpe Building Products has grown year on year thanks to a philosophy of continuous investment and development. 

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At Manthorpe we pride ourselves on our high quality standards, not just for the products that we produce; but for our design, manufacture, sales and delivery processes as well.

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Innovation has always been at the core of the company.  From new technology investment to in-house research and development, Manthorpe is constantly looking ahead to meet the needs of the industry.

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Manthorpe Building Products is an associate member of the following organisations:

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