BIM & VDC SERVICES
As-Built Modeling
Record model production support that captures actual constructed conditions from your project’s closeout documentation.
Our Founding and Mission
Introduction
NexMEP Global LLC supports U.S. consulting firms with as-built modeling, updating design-phase Revit models to reflect actual constructed conditions based on the redline markups, RFI responses, and change order documentation your project generates through construction. Our team carries this update work through project closeout while your engineers retain full authority over which construction-phase changes are incorporated and how discrepancies between design intent and field conditions are resolved in the record model.
We work from the construction documentation your firm provides — contractor redlines, approved submittals, RFI logs, and change order records — producing an updated Revit model that accurately reflects what was actually built rather than simply what was originally designed.
DESIGN ACCURACY & COMPLIANCE
Why This Service Matters
The gap between a design-phase model and the building as actually constructed is inevitable — field conditions, contractor substitutions, and design changes made during construction all mean the original design model no longer fully represents the completed building by the time a project reaches closeout. An accurate as-built model is valuable to the owner for facility management, to your firm for future renovation or addition work on the same building, and as a record of what was actually delivered under the construction contract.
Production support allows this often-deprioritized closeout task to be completed thoroughly rather than left incomplete once a project’s active design fees have been exhausted, delivering a record model that genuinely reflects constructed conditions rather than simply the last design revision issued before construction began.
Our Capabilities
Contractor Redline Incorporation
Systematically updating model geometry from marked-up field drawings, skews, and marked PDF sets.
RFI & Change Order Integration
Reflecting approved requests for information and formal change order modifications directly inside the model.
Approved Submittal Data Reconciliation
Updating equipment parameters, dimensional bounds, and model tags to match installed equipment submittals.
Multi-Source Redline Reconciliation
Cross-referencing overlapping contractor redline sources to resolve conflicting field notes before modeling.
Staged & Incremental Closeout Support
Updating record models in phased batches as closeout packages are submitted over extended schedules.
Facility Management (COBie) Alignment
Formatting asset parameters, data fields, and model LOD to align with owner FM and digital twin specifications.
Calculations
Engineering Calculations
Calculation methodology built for accurate, traceable HVAC equipment sizing.
Field Modification Verification & Audits
Flagging field reroutes or equipment changes that impact design calculations (e.g., duct pressure drops) for engineering review.
Closeout Source-Document Traceability
Maintaining a strict, auditable change log mapping every geometric edit back to its specific RFI, redline, or submittal document.
Calculations
Systems We Support
Ventilation-related calculation support includes outdoor air rate compilation.
Mechanical Systems (HVAC)
Final duct layouts, air handler equipment tags, terminal units, and piping reroutes.
Electrical Power & Lighting
As-built panelboard locations, conduit pathways, switchgear, and fixture placement.
Plumbing & Piping Networks
Installed domestic water, gravity waste slopes, storm lines, and valve locations.
Fire Protection Systems
Final sprinkler head drops, main feed risers, test headers, and pump rooms.
Structural Framing & Concrete
Field-adjusted steel members, foundation footings, shear walls, and penetrations.
Incomplete Documentation Logging
Detailed reporting of systems or zones where field redlines are missing or ambiguous.
Our as-built modeling services cover all major building trades, turning disparate construction-phase closeout files into a fully integrated, accurate record model.
Calculations
Software, Workflow & Coordination
Rigorous backup calculations formatted directly for permit submission and QA/QC documentation.
Software & Production Workflow
Executed directly in Autodesk Revit using your project's design-phase model as the baseline. Every edit is tracked in a transparent audit log, linking geometry updates directly to redlines, submittals, or RFI numbers.
Revit & AutoCAD Coordination
We perform cross-disciplinary checks to confirm that field changes in one trade (such as structural slab openings) are reflected consistently across related MEP models. Unresolved redline ambiguities are flagged for your engineer's review.
Calculations
Systems We Support
Expertise across diverse equipment lines, hybrid configurations, and complex Electrical setups.
Updated As-Built Revit Models
Auditable Change Tracking Logs
Documentation Deficiency Summaries
FM & Digital Twin Ready Data Sets
Need Reliable As-Built Modeling for Project Closeout?
Partner with NexMEP Global LLC for systematic redline incorporation, auditable change logs, and FM-ready record models.
Our Core Philosophy
Typical Project Types
Commercial & Office Towers
High-rise office buildings, corporate headquarters, and tenant fit-outs.
Healthcare & Laboratories
Active hospital renovations, specialized clinics, and complex lab spaces.
Education & Campuses
K-12 schools, higher education buildings, and multi-facility campus developments.
Multi-Family & Industrial
High-density residential complexes, hospitality, and fast-track logistics centers.
Calculations
QA/QC Process
A rigorous, multi-tiered review structure ensuring accurate, clear, and error-free submittals.
Source Document Alignment Checks
Multi-level review verifying that all model updates strictly match contractor redlines, RFIs, and submittals.
Cross-Discipline Consistency Audits
Checking that field changes affecting multiple trades are captured identically across every discipline model.
Independent Sample Verification
Secondary reviewer spot-checking random model elements against raw closeout documents to certify accuracy.
Why NexMEP Global LLC?
NexMEP Global LLC brings a dedicated production team with practical experience across standard and specialty ventilation systems, a consistent U.S. code and standards focus, and a multi-level QA/QC process that reduces rework during your engineer’s review cycle.