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About us

The Mineral Wool Insulation Manufacturers Association provides an authoritative source of independent information and advice on rock and glass mineral wool.


View a selection of our latest press releases and coverage in both the national and trade press.

Party Wall Bypass

Referred to as Thermal Bypass, the phenomenon is now taken into consideration within the new Part L and represents a key issue for housebuilders and designers.

What is Mineral Wool?

Mineral wool is a non-metallic, inorganic product manufactured from a carefully controlled mix of raw materials.


Some of our most frequently asked questions about Mineral Wool. Simply click on a question for a general guide containing the answer.

Building Regulations

Provides a general overview of the current UK Building Regulations relating to Party Wall Bypass, Thermal, Fire and Acoustic.


Encompasses a complex range of issues relating to maintaining a healthy environment - energy use, recycling, air and water pollution, and the transport of finished products, proven by the Green Guide A+ rating.


The Mineral Wool Insulation Manufacturers Association is comprised of 4 member companies who can be contacted directly for more information on their unique products and services.