Change of Auditor

 The Alumasc Group plc

28 April 2022

Change of Auditor

The Alumasc Group plc ("the Company") announces that following a competitive tender process led by the Audit Committee the Board has approved the proposed appointment of Crowe UK LLP as the Company's auditor. This appointment will be recommended for approval by shareholders at the 2022 Annual General Meeting.

BDO LLP ("BDO") have been the auditor for The Alumasc Group plc since 2018 and the Company's Board of Directors extends its appreciation to BDO for their services. BDO has resigned as the Company's auditor and has confirmed to the Company that there are no matters connected with ceasing to hold office that need to be brought to the attention of the members or creditors of the Company for the purposes of section 519 of the Companies Act 2006.

The Company is today writing to shareholders to confirm the above. A copy of the letter will shortly be made available on the Company's website (https://www.alumasc.co.uk/investors/aim/) for the purposes of AIM Rule 26.

Enquiries:

Simon Dray, Group Finance Director tel: 01536 383844

Helen Ashton, Group Company Secretary tel: 01536 383812

The Alumasc Group plcStation Road, Burton Latimer, Kettering, Northants NN15 5JP

LEI: 2138002MV11VKZFJ4359

Notes to Editors:

Alumasc is a UK-based supplier of premium building products, systems and solutions. Almost 80% of Group sales are driven by building regulations and specifications (developers/housebuilders, architects, and structural engineers) because of the performance characteristics offered.

The Group has three business segments with strong positions and brands in their individual markets. The three segments are: Building Envelope; Water Management; and Housebuilding Products.