BRE Screed Tester
If the floor screed is breaking up, cratering or there is loss of adhesion form the resilient floor finish (vinyl, Amtico etc.) or rigid ceramic or natural stone tiles to the screed, the failure could be a lack of compaction of the screed. One method of testing the screed is by using The BRE Screed tester.
The BRE Drop hammer Test is an in situ crushing resistance (ISCR) test designed to test the strength and compaction of the screed as outlined in BS8204-1:2003 + A1:2009 Annex E.
The test consists of either a 4 kg drop weight for categories A, B and C screeds or 2 kg drop weight for category C floating screeds. The weight is dropped vertically four times in succession from a height of 1 m onto an anvil of 500 mm² and the indent is measured with a specific digital depth gauge.
Acceptance limits for in situ crushing resistance test are given Table 4 of BS8204-1:2003+A1:2009.