Exallot Ltd are fully paid up founding members of the Construction Glassfibre Manufacturers Association (CGMA) and registered to the Constructionline database for trusted suppliers.


The CGMA was founded in 2012 by leading manufacturers of glassfibre architectural products including chimneys, dormer windows and bay roofs in response to the need to set common standards of performance and quality.

The use of major prefabricated building components such as chimneys, bay window roofs, door canopies and dormer windows has grown rapidly within the new housebuilding sector due to their speed of construction, durability and consistent quality. However it was recognised by the industry and in discussion with and under the close guidance of the NHBC, the leading underwriter for the new housebuilding industry that the formation of a single industry body to represent manufacturers would lead to improved quality and professionalism within this important component supplier to the new housebuilding sector.

All Exallots chimneys and dormer windows are fully certified by and their production audited by the CGMA assuring you of a quality product every time.


Promoting excellence – and simplifying Buying,

Constructionline is the Official UK register of construction related suppliers and contractors.

All of the suppliers and contractors involved will have met all of the business criteria required to comply with minimum standards and afterwards continue to maintain these exacting requirements to the satisfaction of the Department for Business, Enterprise and Regulatory Reform.

Constructionline provides an up-to-date register of suppliers for construction contracts, with all suppliers pre-qualified to government standards. Used by public and private sector organisations, Constructionline removes the need for a formal pre-qualification stage to assess the company’s competence. This increases efficiency and encourages best practice throughout the procurement process, Which makes ConstructionOnline a essential tool in any efficient procurement process.

It provides an essential pre-qualification tool for use in financial standing and technical references

The concept of a single national database was proposed in 1994 Latham Report. Since then Constructionline has grown and been updated to ensure it is in line with the needs of modern procurement.

In Northern Ireland for all public sector construction work below the OJEU threshold, contractors must be registered with Constructionline.


Click the links to download our certificates if required.


CGMA Chimney Certificate.pdf                                                     CGMA Dormer Certificate.pdf

Chimney2016CGMA                                                                                 Dormer2016CGMA
12331 Ref 1.0A Exallot Dormer Testing.pdf               12333 Ref 1.0 – Exallot Chimney Systems.pdf        

CGMA Chimney testing                                       CGMA Dormer testing

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