How to Quote and Run a Commercial Drylining and Partition Installation

What you will learn

• Why fire resistance is a system question, not just a board-type question, and what that means for your pricing.
• How to take off a board schedule accurately, including waste factors for complex commercial layouts.
• The four line items most drylining contractors miss when building a commercial quote.
• How to structure labour rates across stud erection, boarding, taping and jointing, and specialist finishing.
• What your handover pack needs to include to protect against specification disputes and late snag claims.

Commercial drylining and partition installation is one of the most technically demanding sub-trades in the interior fit-out sector. A drylining contractor quoting on a medium-sized commercial project - say, 1,500 to 3,000m² of mixed partition types across a multi-floor office fit-out - needs to price across specification zones, board families, finishing levels, and fire ratings simultaneously. Get that matrix wrong, and margin disappears before the first metal stud goes up. This guide walks through every stage from reading the specification to closing the final account, covering the most common quoting gaps and the operational disciplines that keep a drylining job running profitably.

Step 1: Read the Specification Before You Price

Most margin problems in drylining start before any calculations begin - they start with a misread specification. On a commercial project, the partition schedule from the architect or interior designer will typically reference multiple partition types, each with a different acoustic rating, fire period, height, and finish requirement. A Type A partition might be a standard single-skin stud with 12.5mm board, while a Type D in the same drawing set might require a 120-minute fire resistance rating using double-layer 15mm fire board on both faces, acoustic insulation, and a sealed perimeter detail.

The critical discipline here is to treat fire resistance as a system question, not a board-type question. The 60-minute or 120-minute rating specified on the drawing refers to the complete wall construction - the stud gauge, fixing centres, board layer count and thickness, joint treatment, and perimeter sealing. British Gypsum's technical guidance makes this explicit: claimed performances are based on tested systems using the specified components together, and using different components cannot be assumed to meet the same performance. A contractor who swaps a specified 15mm Gyproc FireLine (EN 520 Type F, A2-s1,d0 reaction to fire class) for a cheaper 12.5mm board has also quietly stripped the fire rating from the specification.

Before pricing, list every partition type in the schedule and confirm:

1. Identify every partition type code and its full specification - board type and thickness, stud gauge and centres, acoustic fill, and fire period required.
2. Cross-reference partition types with the architectural drawings to understand where each type appears, the heights involved, and any features that add complexity: curved runs, high-level partitions above the ceiling void, shadow gaps, and glazed sections.
3. Confirm the finish specification for each zone - basic tape and joint, full skim coat, or Level 5 finish. Finishing level has a direct labour cost impact.
4. Flag any fire-stopping requirements around service penetrations. Passive fire protection around duct, cable, and pipe penetrations through fire-rated partitions is a separate scope item that must be priced explicitly.

Step 2: Take Off the Board Schedule Accurately

Once you have a clear specification matrix, the take-off generates your material quantities. On a straightforward rectangular partition run, this is arithmetic. On a commercial project with multiple ceiling heights, curved walls, many doorsets, and service penetrations, it requires more care.

For each partition type in the schedule:

1. Calculate the net wall area in m² by multiplying the perimeter length by the partition height. Deduct door and glazed section openings.
2. Apply a waste factor. A waste factor of 10 to 15% is standard for regular layouts. On complex floors with many doorsets, alcoves, and curved runs, 15 to 20% is more realistic. Underestimating waste is one of the most consistent reasons drylining jobs go over on materials.
3. Calculate board quantities by dividing the gross area (net area plus waste) by the coverage of your chosen board size. Standard boards are 2,400 x 1,200mm (2.88m²), but 2,700 x 900mm or 3,000 x 1,200mm boards can reduce cut waste on high-wall applications - worth modelling if you have many partitions above 3.0m.
4. Add the suspended ceiling area separately. Ceiling boarding carries a higher labour rate than walls - typically £15 to £19/m² for labour compared with £8 to £14/m² for standard partition walls in 2026. Price the two separately rather than blending rates.
5. Price specialist board upgrades line by line. Fire-rated and acoustic boards carry a material premium of approximately £3 to £6/m² over standard board in 2026. On a 3,000m² project with 40% of partitions requiring fire or acoustic specification, that uplift runs to £3,600 to £7,200 in materials alone - a number that disappears entirely if it is averaged across the whole take-off.

Step 3: Build the Quote - The Four Items Most Contractors Miss

A well-structured drylining quote for a commercial project prices labour and materials separately for each partition type and ceiling zone, then adds preliminaries and specific commercial risk items. The four line items most often underpriced or omitted entirely are:

1. Metal stud erection as a separate rate. Many contractors blend stud and boarding into a single m² rate. This creates problems when partition heights vary significantly across a job - erecting and bracing a 4.5m-high partition is considerably more labour-intensive than a 2.4m partition, and a blended rate will undervalue the high-wall sections.
2. Perimeter sealing and acoustic detailing. Sound-rated partitions require sealed perimeters at floor, ceiling, and abutting walls, and continuity of acoustic insulation around service penetrations. This labour content is genuinely separate from the main boarding work and should be quoted accordingly.
3. Cutting and making good around structural elements. Steel columns, concrete beams, and complex soffit geometries generate significant additional labour that flat m² rates do not capture. Identify these elements during site visit and price them as specific items.
4. Plant and access equipment. Mobile tower scaffolding or scissor lifts for high-level work above 3.0m need to be priced - either as a hire cost you absorb or as a preliminary item you pass through. If the main contractor is providing powered access, confirm this in writing before excluding it from your price.

Labour rates in 2026 for standard drylining work in the UK run from £8 to £14/m² for partition boarding to £15 to £19/m² for ceiling work, with day rates for experienced drylining operatives typically in the range of £180 to £250/day. Complex or high-specification work - Level 5 finish, acoustic detailing, or shadow gap perimeters - sits at the upper end of those ranges or above them.

Step 4: Run the Installation - Sequencing and Trade Coordination

Commercial drylining runs on the principal contractor's programme, and the two critical dependencies are first-fix mechanical and electrical (M&E) works and the structural frame. Stud erection can often start before all first-fix services are in - but boarding must not close a wall until the responsible M&E sub-contractor has signed off the services within it.

1. Confirm the programme sequence with the principal contractor at mobilisation. Identify the floor-by-floor sequence and the target board completion dates that drive follow-on trades: plastering, decoration, flooring, and joinery fit-out.
2. Agree the M&E sign-off process before boarding starts. A clear rule: no board goes on a partition until the M&E foreman has physically confirmed the services within it are complete and tested. Get this in writing - an email or a site instruction. If a wall is opened later because an electrician needs access, the cost of cutting and making good is recoverable only if you have a clear sign-off trail.
3. Manage your board delivery programme. Commercial drylining volumes - typically 2,000 to 5,000 boards on a medium project - need a phased delivery schedule matched to floor-by-floor progress. Bulk delivery is cheaper, but boards stored on a wet or contaminated concrete slab get damaged, and the saving disappears.
4. Run weekly output checks against your programme. Track actual m² boarded per week against the programme rate. If you are running at 80% of your planned output rate by the end of week two, address it - adjust crew size, review sequencing, or notify the principal contractor. Recovering lost programme in drylining is expensive, and the later the intervention, the higher the cost.

Step 5: Handover, Certification, and Final Account

The handover for a commercial drylining package needs to demonstrate specification compliance, particularly for fire-rated elements. Main contractors are increasingly required to produce Golden Thread documentation under the Building Safety Act 2022, and that creates a real opportunity for sub-contractors who maintain good records - and a risk for those who do not.

Your handover pack should include:

1. As-built partition schedule confirming the partition type installed in each zone, cross-referenced against the original drawing revision. Where substitutions were agreed - a different board manufacturer, a stud gauge upgrade - document the equivalence basis and the approval it was given under.
2. Material delivery records for fire-rated and acoustic boards, tied to the specific areas where they were installed. In a dispute about specification compliance, delivery notes and installation records are your primary evidence.
3. M&E sign-off records for services closed behind partitions. The confirmation from M&E sub-contractors that services were complete before boarding provides a clear chain of accountability if any partition is later opened.
4. Outstanding snagging items at practical completion: list them, assign responsibility, and set a target date. Leaving site with an unresolved snag list and no agreed resolution process is one of the fastest ways to lose retention.

For the final account, compile your variation account in parallel with the works - not at the end of the job. Every instruction, agreed rate change, or additional scope item should be captured as it happens, with a reference to the site instruction or email that authorised it. A variation account assembled from memory three months after site completion will always leave money on the table.

Managing a Commercial Drylining Project in Zigaflow

Running a drylining package on a commercial project means tracking multiple partition types, managing material deliveries against a live programme, coordinating M&E sign-off, and processing variation instructions before they stack up into an unmanageable final account.

Zigaflow's job management tools let you build the project structure from the quote - with separate cost lines for each partition type, ceiling zone, and labour category - and carry that structure through to purchase orders, delivery tracking, and invoicing. Variation instructions can be logged against the original job, keeping your accounts clear as the project evolves. Stage payment applications are raised directly against the job record, with a clear audit trail from approved quote to invoice. For a drylining business running three or four live packages at once, that visibility is the difference between knowing your margin position and discovering it at final account.

Book a demo at zigaflow.com/demo to see how it works in practice.

• Drywall Cost Guide 2026: How Much Does Plasterboard Cost?MyJobQuote · accessed 2026-06-22
• Fire Retardant Boards - Types, Standards and Key UsesFireresist · accessed 2026-06-22
• AT Jones - UK Dry-Lining Sub-ContractorsAT Jones · accessed 2026-06-22
• How to Choose Fire-Rated Wallboards for Domestic and Commercial ProjectsCB Building Products · accessed 2026-06-22

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