K4 Soils Watford geotechnical laboratory
K4 Soils LaboratoryWatford, Hertfordshire
UKAS Schedule 2519, issue 020 dated 23 February 2026, identifies K4 Soils Laboratory at Unit 8, Olds Close, Olds Approach, Watford, Hertfordshire, WD18 9RU as laboratory location code A. It assigns soils for civil engineering purposes and aggregates to that laboratory. It separately assigns plate loading and CBR testing, in-situ density and DCP testing at Ground Investigation sites under code B. This guide preserves those boundaries and confines Watford laboratory technical claims to the schedule’s stated code-A entries, methods, standards and conditions.
Reviewed by Arc · About this review
Key facts
- Current UKAS-listed Watford laboratory
- UKAS Schedule 2519, issue 020 dated 23 February 2026, identifies K4 Soils Laboratory at Unit 8, Olds Close, Olds Approach, Watford, Hertfordshire, WD18 9RU as laboratory location code A for soils for civil engineering purposes and aggregates.
- Published Watford information routes
- K4 Soils Laboratory’s current contact page publishes Unit 8, Olds Close, Watford, Hertfordshire, WD18 9RU and 01923 711288. Schedule 2519 also publishes +44 (0)1923 711288 and james@k4soils.com.
Testing capabilities
Current UKAS-listed Watford soils and aggregate laboratory entries
At Watford laboratory code A, UKAS Schedule 2519 lists aggregate particle-size distribution by sieving and soils-for-civil-engineering entries including water content, dry-density/water-content relationship, California Bearing Ratio, sulphate testing, pH, consolidation, permeability and shear-strength testing. It also lists defined geotechnical soil laboratory entries. Each statement remains subject to the schedule’s stated location code, materials, methods, standards and conditions.
Separate current UKAS-listed ground-investigation-site entries
Schedule 2519 separately assigns plate loading and CBR testing, in-situ density and DCP testing at Ground Investigation sites to code B. These code-B activities are not attributed to the Watford laboratory in this guide.
Equipment and published limits
| Specification | Published value | Conditions |
|---|---|---|
| Selected current UKAS Schedule 2519 code-A laboratory entries | Selected code-A entries include aggregate particle-size distribution by sieving, BS EN 933-1:2012; soil water content, dry-density/water-content relationship and California Bearing Ratio, BS 1377-2:2022; pH, BS 1377-3:2018; one-dimensional consolidation, BS 1377:Part 5:1990; permeability in a triaxial cell, BS 1377:Part 6:1990; and laboratory water content and particle-size-distribution entries under BS EN ISO 17892-1:2014 + A1:2022 and BS EN ISO 17892-4:2016. | This is a selected summary of current Schedule 2519 code-A entries, rather than a complete equipment inventory or unrestricted capability claim. Confirm the exact location code, material, test, method, standard edition, sample requirements, reporting, availability and terms directly with K4 Soils Laboratory. |
Access and contact
K4 Soils Laboratory’s current contact page publishes 01923 711288. UKAS Schedule 2519 publishes Mr James Phaure, +44 (0)1923 711288 and james@k4soils.com. Treat these as information routes and confirm the applicable location code, material, test, method, sample or site requirements, reporting, availability, price, lead time and terms directly with K4 Soils Laboratory.
Facility contact
- Address
- Unit 8, Olds Close, Olds Approach
Watford, Hertfordshire, WD18 9RU
United Kingdom - james@k4soils.com
- Telephone
- +44 (0)1923 711288
- Website
- Official test house website
Standards and accreditation
- UKAS Schedule 2519, ISO/IEC 17025:2017
- UKAS Schedule 2519, issue 020 dated 23 February 2026, states ISO/IEC 17025:2017 accreditation for defined testing at locations specified in the schedule. It identifies Watford as location code A and separately records specified ground-investigation-site activities as code B. Use the schedule for the precise activity, location code, material, method, standard and condition.
What to confirm with the facility
- Schedule 2519 assigns technical entries by location code. Watford is code A for soils for civil engineering purposes and aggregates; specified ground-investigation-site activities are code B. This guide does not attribute code-B activity to the Watford laboratory or code-A activity to all sites. The schedule does not establish a complete equipment inventory, unrestricted scope, booking, availability, capacity, price or lead time.
- K4 Soils Laboratory’s contact page presents the Watford address as “Unit 8, Olds Close, Watford, Hertfordshire, WD18 9RU”; UKAS Schedule 2519 adds “Olds Approach”. This guide uses the schedule’s fuller address form for identity while retaining the provider’s public address presentation as an information route.
- Confirm the applicable location code, material, test, method and edition, sample or site requirements, reporting, availability, price and lead time directly with K4 Soils Laboratory.
Before requesting a test
Public information not available. Contact test facility provider for more information.
Frequently asked questions
Public information not available. Contact test facility provider for more information.
Related testing facilities
Public information not available. Contact test facility provider for more information.
Further reading
Public information not available. Contact test facility provider for more information.
Sources and review
Arc reviewed K4 Soils Laboratory’s current homepage and contact page and UKAS Schedule 2519, issue 020 dated 23 February 2026. The schedule identifies the Watford laboratory as location code A for soils for civil engineering purposes and aggregates, and separately allocates defined field activities at Ground Investigation sites to code B. This guide preserves those boundaries and confines technical and accreditation statements about the Watford laboratory to the schedule’s code-A entries, methods, standards and conditions. Confirm the exact current scope and commercial terms directly with K4 Soils Laboratory.
Arc publishes this directory entry and does not operate the test facility. Suggest a correction to Arc with a supporting source.
Soils Testing - K4 Soils Laboratory
K4 Soils Laboratory’s current homepage is used for its provider-published laboratory and field-testing context and UKAS-accreditation-number statement. The independent UKAS schedule, rather than this page, defines the detailed current accredited scope, location codes, methods, standards and conditions.
Contact Us - K4 Soils Laboratory
K4 Soils Laboratory’s current contact page is used for its published Watford address presentation and telephone. It does not establish detailed accredited scope, booking, availability, capacity, price, lead time or acceptance of a particular programme.
UKAS Schedule 2519: K4 Soils Laboratory
UKAS Schedule 2519, issue 020 dated 23 February 2026, is used for K4 Soils Laboratory’s legal identity, Watford laboratory code-A allocation, separate ground-investigation-site code-B allocation, ISO/IEC 17025:2017 statement, published schedule information route and defined entries. It does not establish scope beyond its listed location codes, materials, tests, methods, standards and conditions, or booking, availability, capacity, price, lead time or acceptance of a particular programme.