Dubai, United Arab Emirates
+971 56 381 5986 admin@sigma-phi.com
Dubai · United Arab Emirates

A specialist contractor with engineering in-house.

Concrete restoration, structural strengthening, structural modification and building rehabilitation — on existing reinforced-concrete and post-tensioned structures. Assessment, engineering design and execution under one coordinated team.

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0+ Years in RC & PT structures
0 Specialist service lines
0 Codes & standards applied
Reinforced concrete frame — columns and coffered slab
Engineering + Execution
Who we are

A specialist contractor, with the engineering in-house.

SigmaPhi delivers concrete restoration, structural strengthening, structural modification and building rehabilitation across residential, commercial, industrial and infrastructure assets. Our integrated approach brings assessment, engineering design and execution under one coordinated team — so the solution is built around the actual condition of the structure, not around an assumption.

  • ✓Assessment, design and execution in one team — reduces the number of parties a decision has to pass through when site conditions differ from the drawings.
  • ✓In-house structural engineering — strengthening schemes developed from the as-found condition, not adapted from a standard detail.
  • ✓Reinforced-concrete and post-tensioned structures — including tendon mapping before any core, cut-out or anchor.
  • ✓Designed to published standards — ACI, Eurocode, TR55 and Dubai Municipality requirements.
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What we do

Seven service lines across the structural lifecycle.

In practice most projects combine three or four of these under a single appointment — from diagnosis and engineering design through to strengthening, protection and close-out.

Structural Assessment & Reporting

Visual survey, GPR, NDT, coring and laboratory testing — with a diagnostic report that establishes root cause before quantities.

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Engineering Analysis & Strengthening Design

FE modelling in ETABS, SAP2000 and SAFE; PT slab and beam analysis in ADAPT, RAPT and RAM Concept; detailed design drawings.

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Structural Strengthening

CFRP sheets, laminates, NSM bars and prestressed systems; RC and micro-concrete jacketing; steel plate bonding; external post-tensioning.

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Concrete Repair & Crack Injection

Breakout and reinstatement, corrosion treatment, anti-carbonation protection, epoxy and polyurethane injection to dry and water-bearing cracks.

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Structural Modifications

New slab openings, wall and column removal with load transfer, diamond coring and sawing, load upgrades for change of use.

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Waterproofing

Roof, basement and podium systems, wet area protection, and remedial waterproofing to structures already in service.

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Rehabilitation & Maintenance

Planned preventive maintenance, condition-based intervention scheduling, facade and balcony repair, car park deck systems.

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Something not listed?

Every structure has its own constraints. Tell us what you're dealing with and we'll tell you honestly whether it's ours to solve.

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How we work

Assessment to verification, under one contract.

Five stages forming one coordinated process. SigmaPhi can be appointed for the complete sequence, or for individual stages according to project requirements.

01

Structural assessment

Visual survey, GPR, NDT, coring and lab testing. Output is a diagnostic report with root cause.

02

Engineering design

Analysis of the as-found structure, calculations and detailed design drawings.

03

Strengthening execution

CFRP, jacketing, steel, external PT. Method statements and ITPs before mobilisation.

04

Repair and protection

Reinstatement, corrosion treatment, injection and waterproofing to stop recurrence.

05

Verification and handover

Pull-off testing, as-built records, load testing where specified, close-out dossier.

What the client receives at each stage

01 · Structural assessment
Diagnostic report, test data, annotated survey drawings
02 · Engineering design
Calculations and detailed design drawings
03 · Strengthening execution
Method statements, ITPs, material certificates, daily records
04 · Repair and protection
Repair records, batch traceability, warranty documentation
05 · Verification and handover
As-built drawings, test certificates, close-out dossier
Post-tensioned structures

We scan before we cut.

On a post-tensioned slab, coring, cutting or anchoring without accurately identifying the existing tendons and reinforcement can turn a routine modification into a significant structural problem. It is the single most common way these works go wrong.

How we handle it

Before any core, cut-out or anchor is drilled into a PT slab, the tendon layout is mapped by GPR and marked on site against the as-built drawing. Where the drawing is unavailable or the scan is inconclusive, this is recorded and a scan-and-verify hold point is established — rather than proceeding on assumption.

Post-tensioned floor plate — tendon layout model
Post-tensioned floor — tendon profile and layout model
Track record

Delivered by our team, before SigmaPhi.

Led and delivered by members of SigmaPhi's founding technical team in their prior professional capacities.

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Material systems we specify

Sika Fosroc Master Builders S&P Hilti Mapei

Recognised systems that may be specified and installed according to published technical data and project requirements. Proposed materials are submitted for consultant and client approval prior to use.

Have a structure that needs looking at?

Assessment, strengthening design, or full execution — tell us what you're dealing with.

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