As the first defence against the elements, bricks need to be able to stand up to the harshest of conditions. That’s why everything we manufacture has passed the most rigorous tests and why nothing leaves our premises without BS EN 771-1 certification.
All of our bricks are tested at Lucideon, the UK’s leading testing authority, for the following:
This test replicates the weather conditions in which a brick would be expected to perform in the European/British climate. A brick panel is built and saturated for seven days before being frozen to -15°C, then thawed to +20°C. This process is repeated 100 times and the level of frost resistance is recorded:
F2 – completely frost resistant
F1 – moderately frost resistant
F0 – no frost resistance
10 bricks are selected from a production batch and each brick is subjected to a uniform pressure in a testing frame where the pressure is increased until the brick fails. The average pressure is calculated for all ten bricks and then recorded as the compressive strength for that product.
This is measured by how much a brick increases in weight after it has been soaked in water for 24 hours. Results are given as a percentage, so for example a brick with a water absorption of 15% will take on 15% of its dry weight in water.
This test measures the quantity and type of salts that are present in the selection:
S0 – suitable for completely protected walls with no saturation (internal, rendered or cladded)
S1 – suitable for brickwork with normal levels of saturation
S2 – suitable for brickwork with prolonged levels of saturation
10 bricks are randomly sampled and measured with a bespoke measuring device in millimetres for length, width and height in that order, and the mean values are calculated. The manufacturer will declare which tolerance categories the mean values fulfil.
There are three classifications for mean:
TM – may be wider or closer than other categories
T1 – a set tolerance to the bricks against the declared size
T2 – a tighter tolerance to the declared size
The manufacturer will also declare a range value for the bricks, which is the overall difference between the largest and smallest brick within the 10 bricks measured. The declared dimension must fall within a range classification:
RM – the range in mm may be wider or closer than other categories
R1 – bricks must fall with a certain tolerance depending on the dimension
R2 – bricks must fall within a tighter dimension
Test results for all of our brick products are available on request.