Structural Performance
Strength
The Mannok range of aircrete thermal blocks includes the Mannok Aircrete High Ten and the Mannok Aircrete Seven blocks with compressive strengths of 10.4N/mm2 (Category 2) and 7.5N/mm2, thus meeting all the regularity strength requirements across Ireland and the UK, including Ireland’s Technical Guidance Document A – 2012 – Structures, which requires blocks to have a compressive strength of 7.5N/mm2.
Durability
Mannok aircrete blocks are the only thermal blocks in Ireland which are certified for use below DPC for durability purposes.
All Mannok aircrete blocks have been tested for freeze/thaw resistance using recognised test methods and are certified for use in all ground conditions outlined in Table 14A of NSAI publication SR 325, up to and including MX 3.2, high degree of saturation with freezing.
No other thermal block on the Irish market complies with the requirements of Table 14A, which covers durability in masonry in finished construction.
Mannok aircrete blocks are also covered in standard IS EN 1996-2 2006 specification of masonry for durability. Table B1 of the Code clearly states that AAC blocks meet the requirements of MX 3.2.