Celtest Company Trefelin laboratory
Celtest CompanyBangor, Gwynedd
UKAS schedule 0494, issue 067 dated 04 March 2026, identifies Celtest Company’s Trefelin, Llandegai laboratory as permanent location A. The schedule states ISO/IEC 17025:2017 accreditation for defined aggregate, soil, geotechnical, hardened-concrete and thermal-conductivity activities at that location.
Reviewed by Arc · About this review
Key facts
- Permanent location-A laboratory
- UKAS schedule 0494 identifies Trefelin, Llandegai, Bangor, Gwynedd, LL57 4LH as Celtest Company’s permanent laboratory location A.
- Defined location-A activities
- At location A, the schedule lists aggregate, soil, geotechnical, hardened-concrete and thermal-conductivity activities.
Testing capabilities
Aggregate and soil testing
At location A, the schedule lists aggregate crushing and particle-characterisation activities, plus soil moisture, consistency, particle-size, density, CBR and related physical-testing activities.
Geotechnical laboratory testing
At location A, the schedule lists geotechnical laboratory soil testing including water content, bulk and particle density, particle-size distribution, unconfined compression, unconsolidated-undrained triaxial, direct shear, permeability and Atterberg-limit activities.
Hardened concrete and thermal conductivity
At location A, the schedule lists hardened-concrete strength, density, water-penetration, secant-modulus, cored-specimen examination and compression-testing, and carbonation activities, and thermal conductivity by thermal needle probe procedure for hardened concrete, rock and soils.
Provider-published soil laboratory facilities
Celtest says its Bangor soil laboratory is a 35,000-square-foot facility with 7 shear boxes and 50 triaxial permeability testing units. These are provider-published figures; confirm current equipment, method and location applicability directly.
Equipment and published limits
| Specification | Published value | Conditions |
|---|---|---|
| Provider-published soil laboratory size | 35,000 square feet | Celtest describes this as a Bangor soil-laboratory figure. Confirm current facility, location applicability and capacity directly. |
| Provider-published soil laboratory equipment | 7 shear boxes and 50 triaxial permeability testing units | Celtest publishes these Bangor soil-laboratory figures. Confirm current equipment, method, location applicability and availability directly. |
Access and contact
Celtest publishes a contact form, postmaster@celtest.com and 01248 355269 for its Trefelin head office. Confirm the material, method, location-A scope, sample preparation, reporting, availability and lead time directly.
Facility contact
- Address
- Trefelin, Llandegai
Bangor, Gwynedd, LL57 4LH
United Kingdom - Telephone
- 01248 355269
- Website
- Official test house website
Standards and accreditation
- ISO/IEC 17025:2017 accreditation
- UKAS schedule 0494, issue 067 dated 04 March 2026, states ISO/IEC 17025:2017 accreditation for the detailed location-A Trefelin laboratory scope.
What to confirm with the facility
- Confirm the material, requested method, sample condition and preparation, location-A accreditation applicability, reporting, availability and lead time directly with Celtest.
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 UKAS schedule 0494 and Celtest’s current concrete, soils, thermal-resistivity and contact pages on 30 September 2026. The guide attributes only activities marked location A, including A alongside other codes, to the Trefelin laboratory. Provider-published facility figures are kept distinct from the detailed UKAS schedule, and the published contact route is treated as an enquiry route without asserting a booking, external availability, capacity, price, lead time or item acceptance.
Arc publishes this directory entry and does not operate the test facility. Suggest a correction to Arc with a supporting source.
Schedule of Accreditation 0494: Celtest Company
Schedule 0494, issue 067 dated 04 March 2026, identifies Trefelin as permanent location A and details aggregate, soil, geotechnical, hardened-concrete and thermal-conductivity activities bearing location A. Entries marked C, B, LHR or X without A are not attributed to Trefelin.
Celtest concrete laboratory page
The current first-party concrete page identifies Celtest Company at Trefelin and describes provider-published hardened-concrete testing. It does not extend the detailed location-A UKAS scope or establish booking, availability, capacity, price, lead time or item acceptance.
The current first-party soils page identifies Celtest Company at Trefelin and publishes a 35,000-square-foot Bangor facility, 7 shear boxes and 50 triaxial permeability testing units. These are provider-published figures, not a current availability or acceptance commitment.
Celtest thermal resistivity testing page
The current first-party thermal page identifies Celtest Company at Trefelin and describes provider-published thermal-resistivity services. It does not extend the detailed location-A UKAS scope or establish booking, availability, capacity, price, lead time or item acceptance.
The current contact page publishes a Trefelin head-office form, postmaster@celtest.com and 01248 355269. Those details are treated as an information route, not a booking, availability, capacity, price, lead-time or item-acceptance commitment.