Sandberg London materials testing laboratories
Sandberg LLPLondon
Sandberg LLP’s central laboratories at 5 Carpenters Place test construction materials, natural stone, roofing slate, metals and related products. Current UKAS register 0262 and schedule issue 089 identify this London laboratory as location A. Off-site activities use code D and are separately allocated. The exact material, method and edition control the scheduled scope.
Reviewed by Arc · About this review
Key facts
- Exact laboratory
- 5 Carpenters Place, Clapham High Street, London SW4 7TD. The owner identifies its head office and central laboratories here, matching schedule location A and register 0262.
- Local and off-site work
- The schedule separates laboratory A from off-site D. Darlington is separately listed by the owner as a steelwork-inspection office, without transferring the London laboratory scope.
- Published enquiry
- Use mail@sandberg.co.uk or +44 20 7565 7000. For stone testing the owner also publishes david.ellis@sandberg.co.uk, marco.mazzoni@sandberg.co.uk and +44 20 7565 7065. Ewan Maclean is the schedule-listed contact, without a present job-title claim.
Testing capabilities
Construction-material analysis and physical tests
Laboratory A rows cover aggregate chemistry, petrography, grading, flakiness, soundness and fragmentation, plus cement and hardened-concrete analysis. Concrete scope includes cube/core strength, density, petrography and chloride migration. The separate D-only coring, dust-drilling and structural survey rows are off-site work.
Natural-stone performance and durability
Local stone methods include petrography, density/porosity, absorption, compression, flexural strength, abrasion, dowel/anchorage strength and salt crystallisation. Frost resistance uses BS EN 12371:2010 and thermal ageing uses BS EN 14066:2013. Marble thermal/moisture cycles are specifically BS EN 16306:2022 Annex C, with appearance cycling separately listed.
Roofing slate and masonry-unit testing
Laboratory A slate rows cover dimensions, bending failure load, absorption and thermal cycling to specified BS EN 12326-2:2011 clauses. Slate petrography excludes X-ray diffraction, and sulphur-dioxide exposure is limited to CaCO3 content at or below 20%. Separate masonry-unit rows cover compression, density/porosity, capillary absorption and dimensions.
Paving and pendulum slip testing
Laboratory A covers specified concrete flags, kerbs, blocks and terrazzo abrasion, slip and strength rows. Pendulum slip resistance and surface roughness are allocated to both A and off-site D, with BS EN 16165:2021 among the named methods. The two locations are distinct.
Metal mechanical and metallographic testing
Ambient tensile scope lists up to 300 kN using BS EN ISO 6892-1:2019 Methods A and B, separately from up to 1,000 kN using Method B. Local hardness, Charpy and metallography rows are also listed. Charpy is limited to 300 J from 233 K to ambient, and steel grain-size determination is by the comparative method only.
Weld, reinforcing-steel and bolt tests
Laboratory A lists designated weld bend, fracture, hardness, impact, tensile, visual, macro and micro tests under specified codes. Reinforcing-steel tensile strength is listed up to 40 mm diameter, with separate tensile-property and weld rows. Fastener tensile and proof-loading rows apply to bolts only. No whole-product approval or qualification certificate is inferred.
Equipment and published limits
| Specification | Published value | Conditions |
|---|---|---|
| Ambient tensile, Methods A and B | Up to 300 kN | Exact metals row to BS EN ISO 6892-1:2019 Methods A and B. Distinct from the separate Method B 1,000 kN row. No equipment count or elevated-temperature range is established. |
| Ambient tensile, Method B | Up to 1,000 kN | Exact separate metals row to BS EN ISO 6892-1:2019 Method B only. No transfer to other methods, bolt/rebar limits or combined apparatus range. |
| Charpy impact conditions | Up to 300 J, from 233 K to ambient temperature | Exact local BS EN ISO 148-1:2016 row. Temperature and energy limits apply to Charpy only. No lower temperature or universal mechanical-test capacity is verified. |
Access and contact
Use mail@sandberg.co.uk or +44 20 7565 7000 for the London central laboratories. The stone page publishes david.ellis@sandberg.co.uk, marco.mazzoni@sandberg.co.uk and +44 20 7565 7065. Ewan Maclean is the schedule-listed contact. Agree the material, representative sample, exact method/edition, laboratory or off-site allocation, preparation and report. Current availability and turnaround require confirmation.
Facility contact
- Address
- 5 Carpenters Place, Clapham High Street
London, SW4 7TD
United Kingdom - mail@sandberg.co.uk
- Telephone
- +44 20 7565 7000
- Website
- Official test house website
Standards and accreditation
- UKAS 0262 and ISO/IEC 17025:2017
- Exact register 0262 and retrieved schedule issue 089 identify Sandberg LLP. The issue is dated 1 September 2026. Laboratory A and off-site D are allocated row by row, without blanket accreditation for the wider owner portfolio.
- Stone and slate method boundaries
- Stone frost resistance is BS EN 12371:2010, thermal ageing is BS EN 14066:2013, marble cycling is BS EN 16306:2022 Annex C and appearance cycling is BS EN 16140:2019. Slate thermal cycling is BS EN 12326-2:2011 clause 15, petrography clause 16 excludes X-ray diffraction and sulphur-dioxide clause 14 applies where CaCO3 is at or below 20%.
- Concrete, aggregate and paving examples
- Specific local rows include aggregate grading BS EN 933-1:2012, concrete chloride migration BS EN 12390-18:2021+A1:2024 and pendulum slip BS EN 16165:2021 at A and D. Older BS 3921:1985 brick and BS 7976-2:2002+A1:2013 slip references are explicitly marked withdrawn. Agree the exact product row and edition.
- Metal and product test conditions
- Ambient tensile uses BS EN ISO 6892-1:2019 with separate Methods A/B and Method B limits. Charpy uses BS EN ISO 148-1:2016. Grain-size comparison uses BS EN ISO 643:2024. Bolt tensile/proof uses BS EN ISO 898-1:2013. Weld tests are designated under listed codes, with no automatic qualification-certificate claim.
What to confirm with the facility
- Agree laboratory A or off-site D for the selected method. D-only concrete survey/coring and curtain-wall water/impact rows are not London laboratory capabilities. The Darlington inspection office is separate.
- Confirm the exact stone/slate product and edition. Slate petrography excludes X-ray diffraction and sulphur-dioxide exposure has the CaCO3 condition. Wider owner acid-immersion and slate claims are outside the retained scheduled scope.
- Keep the 300 kN Methods A/B and 1,000 kN Method B ambient tensile rows separate. Confirm Charpy conditions, rebar diameter and bolts-only scope. Withdrawn references require agreement rather than an inferred replacement.
- Provide sample material, quantity, dimensions, preparation, target method, acceptance criteria, reporting needs and preferred programme dates.
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
Reviewed by Arc on 1 October 2026 in Europe/London using five active official captures and one separately preserved failed contact route. The current owner contact, exact register 0262 and thirteen-page schedule verify the London central laboratories. All complete PDF pages were extracted, rendered and visually inspected. Issue 089 is dated 1 September 2026, while PDF creation/modification are 15 September 2026. Local A, off-site D and Darlington inspection-office allocations remain distinct. Exact stone/slate editions, exclusions, separate ambient tensile methods/limits, Charpy conditions and bolts-only scope control the claims. Wider owner services are not automatically accredited. General and stone enquiry routes are published, with Ewan Maclean kept as schedule-listed without a present role. Older linked contact returned 404, while the linked current contact succeeded. Original titles, canonicals, publisher dates, bytes, headers and provenance are retained. Prior owner and schedule bodies are byte-identical. Imported mirror status and postcode coordinates are cleared.
Arc publishes this directory entry and does not operate the test facility. Suggest a correction to Arc with a supporting source.
Materials Consultancy · Testing · Inspection · Investigation - Sandberg
Owner describes independent materials testing and broader laboratory, site and consultancy portfolios. Exact retained laboratory allocation and accreditation follow schedule 0262, without transferring every advertised service to this site.
Owner identifies head office and central laboratories at 5 Carpenters Place, with general email and telephone. The separately listed Darlington steelwork-inspection office is outside this laboratory guide. Older linked contact URL returned 404 and is preserved separately.
Owner describes stone testing and representative sample selection, with David Ellis and Marco Mazzoni stone contacts. Wider owner acid-immersion and slate claims are not transferred beyond exact schedule rows. No present role or turnaround guarantee is inferred.
Search UKAS accredited organisations
Exact Sandberg LLP Testing Laboratories 0262 result identifies 5 Carpenters Place, London SW4 7TD, telephone and owner website. Protected email is not decoded. Unrelated search results and organisation-selector entries are excluded.
Issue 089 dated 1 September 2026, all thirteen complete pages inspected. Laboratory A is 5 Carpenters Place, while D covers off-site activities. Exact local stone, slate, construction-material, paving, metal, weld and bolt rows control the guide. Separate tensile methods and limits, Charpy conditions, slate X-ray exclusion and sulphur-dioxide condition are preserved.