Garden Bricks - Which Are The Best?
Dwarf walls and step risers subject brickwork to extreme moisture and frost conditions.
F2 bricks are frost resistant but not frost proof so bricks used for landscaping should meet this classification but also meet class 2 DPC specifications of no greater than seven per cent water absorption and 50N/mm strength. It is also important to remember that where brickwork is used to retain soil, an adequate membrane must be installed with complementary weep holes to protect the brickwork from a constant percolation of ground moisture and prolonged saturation.