Assessment of surface regularity of screed using a straightedge –
According to British Standards, Surface Regularity is defined as the deviation in height of the surface of a flooring layer over short distances in a local area. In simpler terms, it is the ‘flatness’ or ‘measure of waviness’ of the screeded surface. To facilitate easy assessment of the flatness of the floor screed, the extent of surface regularity of the screed is generally expressed in terms of permissible departure from the underside of a 2m straightedge on legs laid in contact with the screed.
Indirect impairment includes long term problems such as:
- Quicker degradation of floor due to increased wear
- Impact at high spots
- Lipped Joints
It is therefore important to confine these deviations within reasonable limits so as to ensure adequate serviceability depending on the intended use of the floor.
At CSC, we generally install floor screeds to SR2 specification. We also cater to projects that require SR1. However, it should be noted that SR1 specifications usually dictate a higher cost structure, as is documented in BS8204.