Laboratory · Masonry units
The strength of a load-bearing wall starts with the unit. Compressive strength, density and absorption of bricks and blocks feed directly into wall design and into how well render and mortar bond.
All four tests are accredited under ISO/IEC 17025 (DPA certificate LT 069) for clay, calcium-silicate and concrete units.
4accredited tests on this page
ISO/IEC 17025DPA certificate LT 069, valid to 07.06.2029
EN · ISO · ASTMcurrent editions of the referenced standards
On siteVrrin, Durrës–Tirana motorway, km 29
When you need these tests
- Producers declaring properties for CE marking.
- Load-bearing masonry where the design assumes a unit strength.
- Checking deliveries on site, or units in an existing building before assessment.
Accredited tests and standards
Clay, calcium-silicate and concrete units
| Test | What it tells you | Range | Standard | Where |
|---|---|---|---|---|
| Compressive strength | Declared compressive strength of the unit for wall design | 1–88 MPa | BS EN 772-1:2011+A1:2015 | On site |
| Net and gross dry density (clay, calcium silicate, concrete units) | Density of clay, calcium-silicate and concrete units | 500–2500 kg/m³ | BS EN 772-13:2000 | On site |
| Water absorption | Water absorption, linked to durability and render adhesion | 0.1–30% | BS EN 772-21:2011 | On site |
| Dimensions of masonry units | Checks units against declared dimensions and tolerances | 0.1–500 mm | BS EN 772-16:2011 | On site |
Sampling and what to send us
- At least 6–10 whole units from the same batch, depending on the tests.
- The declared strength and density from the producer, if available.
What your test report contains
- A unique report number, the accredited laboratory’s details and the ISO/IEC 17025 accreditation mark for accredited tests.
- Sample identification, sampling details and the condition of the sample on receipt.
- The standard and method used for every test, with any deviation stated.
- Results with units, and comparison with the specified limits when you give them to us.
- Signature of the authorised laboratory staff.
Frequently asked questions
Do you test existing walls?
Yes. Units removed from an existing building can be tested for strength and density as part of a seismic assessment.
Related testing
Need these tests for your project?
Tell us the material, the quantity of samples and the specification you are working to. We’ll confirm the tests, the sampling and the price.