Underfloor Ventilation

Underfloor ventilation is a vital component in ensuring airflow for voids under suspended concrete and timber floors and ongoing changes to the Building Regulations continue to affect specifications and drive Manthorpe’s product development and innovation.

Manthorpe provides a complete modular product range for underfloor ventilation specifications, particularly in response to adjustments to Part L of the building regulations. These changes relate to a required increase in thermal insulation for suspended floors and in wall cavities, with the result that existing underfloor ventilation products may no longer have sufficient ‘reach’, either through brick courses or wall cavities.

Manthorpe’s telescopic underfloor ventilation products ensure most modern construction scenarios are catered for by our G965 telescopic vents covering a range of 5-8 brick courses. In addition, extension and cavity sleeves can increase reach by 2 extra brick courses and around 300mm through cavity or solid walls. Finally, all of these underfloor ventilation products are designed to terminate seamlessly with Manthorpe’s own G930 air brick.


Underfloor ventilation – part of the full Manthorpe range

Our underfloor ventilation systems are entirely British manufactured, as are the majority of our products; proudly supporting British manufacturing and minimising risk in the supply chain and in your project schedules.

If you need more information or advice on our underfloor ventilation systems or any other aspect of a specific project, you can get in touch with us through our contact page webform or by email or phone, and we’ll be happy to help.

You can find stockists for our underfloor ventilation systems and the full Manthorpe product range through our ‘Find a stockist’ facility. Just pop in your postcode for a list of your nearest stockists and accompanying maps and directions.

Alternatively, visit our Contact Us page to find details for your local Area Sales Manager.

And finally, remember to sign up for our new emails containing all the latest product updates, promotions and offers straight into your inbox.

Underfloor Ventilation: 6 Results

The G965 Dual Extended Telescopic Underfloor Void Ventilator is designed to provide a clear airflow passage to a void beneath an insulated suspended floor. The current and future requirements of Part L of the Building Regulations along with other standards and regulations have led to...

The G960 Telescopic Underfloor Void Ventilator is designed to provide a clear airflow passage to the void underneath a suspended floor. The telescopic feature enables the ventilator to adjust vertically between three and five brick courses, although a G961 extension sleeve is also...

The G966 Stacked Underfloor Void Ventilator is a telescopic ventilator providing twice the amount of airflow as a standard vent, to the underfloor void of a property. The current and future requirements of part M of the building regulations for accessibility into and around a domestic...

The G961 Vertical Extension Sleeve has been designed for use with the Manthorpe range of Telescopic Underfloor Ventilators. Each extension sleeve allows the vent to reach a further two brick courses vertically. The sleeve can also be fitted to the base of the underfloor vents to provide a...

The G935 Combination Cavity Sleeve fits into the back of Manthorpe’s G930 Airbrick to ventilate through a standard cavity or solid brick wall. The unit can be stacked to create a 9" x 6" and 9" x 9" alternative, and telescopes to fit cavity widths of 50mm to 100mm, with further extension...

The G962 Remote Void Ventilator is designed to connect to the G930 Air Brick or G960 Underfloor Vent to a 4" round pipe or alternatively Manthorpe's GRPA/GRPA1 Flexible Pipe. The adapter fits directly onto the bottom of the G960 Underfloor Vent and can be easily cut down between the...


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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