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What is Thin Joint Construction?
Thin Joint is a masonry wall construction technique which replaces conventional 10mm cement : sand mortar joints with 2-3mm joints using a special adhesive mortar.
This technique of 'gluing' blocks together results in a significantly faster build time, less waste, less materials and plant required on site and walls with improved u-values and air-tightness.
This technique of construction is growing in popularity in the UK and already accounts for up to 90% of masonry construction in many European countries! Furthermore, as building regulations are updated and the technical and environmental requirements of buildings are ever-increased, the benefits of this quick, easy and highly effective building method will become more and more apparent. In effect, Thin Joint construction offers a solution to builders wishing to maximise the thermal performance of a building, minimise CO2 emissions over the building's lifetime and yet maintain the familiarity, comfort, stability and long-term solidity of a masonry building.
The success and accuracy of building a wall using Thin Joint construction relies on the dimensional accuracy of the blocks being used. Traditional 440mm long lightweight aggregate and dense concrete blocks from our range or from any manufacturer do not possess this level of accuracy.
Our Airtec range of aerated concrete blocks are perfectly suited to Thin Joint construction (as well as conventional mortar construction) and are the only UK manufactured block to possess the very tightest possible dimensional tolerance category of 'Thin Layer Mortar B' (TLMB). This category requires an additional level of mortar bed flatness and coursing height parallelism of the block as well as tighter length x width x height tolerances.
Generally, when using Thin Joint the overall techniques of building walls, accommodating movement, installing floors and roofs will be familiar to anyone who has ever built a masonry brick and block building. There are however some key differences in design and technique that need to be allowed for when using this method of construction:
Thomas Armstrong (Concrete Blocks) Ltd
Part of the Thomas Armstrong Group
T: 01900 68211
F: 01900 602672