Proctor A1 Cement Board is a lightweight A1 non-combustible external grade ‘score and snap’ cement board with mesh reinforced facings. It is suitable for use on steel or timber frame wall applications.

Features

  • Suitable for use on a variety of projects including high rise buildings

  • Tested in accordance to BS EN12467: 2012+A2: 2018 'Fibre-cement flat sheets'

  • Manufactured combining Ordinary Portland Cement, with a reinforced matrix, enhancing the workability and handling properties

  • Supplied in 12.5mm thickness

  • Can be scored and snapped with a utility knife and straight edge

  • Makes an ideal exterior sheathing board to SFS walling

  • Inorganic composition, making it dimensionally stable

  • Can be installed externally and / or internally to the main wall structure

  • Lighter weight compared to cement particle and calcium silicate sheathing boards

  • Samples available

Board fixings

  • SFS: minimum 45mm length, 4.8mm carbon fixing suitable for fixing into steel sections from 0.7-3.0mm in thickness.

  • Timber: minimum 50mm length, 4.8mm carbon fixing.

Weatherproofing

Whilst Proctor A1 Cement Board is inherently resistant to water ingress, joints and junctions must be protected by suitable membranes. Over the face of the boards a vapour-permeable walling underlay, such as Wraptite®, should be utilised; with appropriate interface membranes around openings. Membranes should conform to the guidance of BS 5250:2021.

Use with Wraptite

While suitable for all buildings, the through-wall fire testing carried out featuring Proctor A1 Cement Board means it can be used with Wraptite to support compliance with fire safety requirements for relevant buildings.

As the membrane offers a W1 classification for water hold out, there is no need to use tapes and sealants on the Proctor A1 Cement Board to provide airtightness and temporary weather protection.

Key to the development of Proctor A1 Cement Board was the desire to offer the best possible all-round solution. As a result, it combines the benefits of traditional fibre cement boards with desirable qualities of newer gypsum sheathing boards that have gained acceptance in the marketplace.

Proctor A1 Cement Board is backed up by comprehensive technical support, plus on-site support including all complementary fixings and accessories.