If we look at each different type you re going to have different floor screed thickness on the minimum and maximum depths.
Floor screed minimum thickness with sbr.
Bonded screeds are utilised where screed thickness cannot be built up or to minimise dead loads on structure.
Isopol sbr a styrene butadiene sbr polymer latex screed additive and bonding agent for heavy duty flooring or rapid drying levelling screeds to receive various types of floor finishes.
Therefore to allow for deviations in the finished levels the specified design thickness should be a minimum of 70mm.
Sbr polymer modified screed includes a synthetic polymer resin to give increased toughness and bond properties.
Pye pw and harrison hw.
Floors and flooring bre 2003.
However bs 8204 1 emphasizes that there is a high risk of screed curling with unbonded and floating levelling screeds.
Shrinkage and cracking is minimised permeability is reduced and flexural strength is improved.
Bonded screed minimum depth.
Isocrete isopol sbr is used to produce polymer modified wearing screeds for heavy duty and industrial flooring and for rapid drying levelling screeds.
There are proprietary screeds available that can be laid at thinner depths than conventional sand and cement screeds.
This screed provides high performance at thinner sections and is ideal when normal thickness cannot be achieved.
The screed thickness should not be less than 50mm.
Also where bonded screeds are installed as part of a flexible waterproofing system in combination with a flexible bonding agents.