Demountable Walls vs Drywall: Cost, Acoustic Performance, Reconfiguration Flexibility, and ROI for Canadian Commercial Offices

Every commercial office renovation in Canada arrives at the same decision: build permanent drywall or invest in a demountable modular wall system. The choice affects your build cost today, your total cost over the life of the lease, your acoustic performance, your ability to adapt when the business changes, and the amount of construction waste your project generates.

Most cost comparisons online use generic US figures, skip acoustic data entirely, and give no guidance on where the lifecycle math actually tips. This page gives you the specific comparison you need to make the right decision for a Canadian commercial office.

The Comparison: 

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1. Upfront Installation Cost​

Demountable Modular Walls

Estimated Canadian market range: $80-$150 per sq ft installed for solid demountable systems; $150-$350+ per sq ft for glass partition systems depending on glazing specification, frame finish, and acoustic performance. These are market estimates — Selectta provides project-specific pricing after consultation.

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Drywall (Traditional Construction)

Estimated Canadian market range: $40-$100 per sq ft installed depending on ceiling height, acoustic specification, number of doors, and local trades conditions. Lower upfront cost in isolation.

Advantage: Drywall — lower initial outlay —

2. Installation Time​

Demountable Modular Walls

A 1,000 sq ft modular partition installation typically takes 3-7 business days. Dry installation process — no wet trades, no curing time, no painting. Adjacent workspaces are typically unaffected. Space is accessible almost immediately after completion.

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Drywall (Traditional Construction)

A comparable drywall installation typically takes 3-6 weeks including framing, boarding, taping, mudding, curing, and painting. Dust, noise, and restricted access are unavoidable during this period. Construction delays affect adjacent operations for the full duration.

Advantage: Modular — 30-50% faster installation 

3. Reconfiguration Cost and Disruption​

Demountable Modular Walls

Reconfiguration means disassembling components at the floor and ceiling connections, relocating them, and reinstalling in the new configuration. No demolition. No waste. No painting. A 2,000-3,000 sq ft reconfiguration typically takes 2-5 business days and costs a fraction of a drywall rebuild. The space remains partially operational throughout.

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Drywall (Traditional Construction)

Reconfiguration means full demolition: cutting out walls, disposing of gypsum and framing as waste, rebuilding from scratch, and finishing all over again. A comparable drywall reconfiguration typically costs $15,000-$80,000+ and takes 3-6 weeks. Every change cycle resets the cost clock.

Advantage: Modular — significant advantage over any lease with layout changes —

4. Total Cost of Ownership (7-10 Years)​

Demountable Modular Walls

Higher upfront cost, but components are reused across every reconfiguration cycle rather than written off. For organizations on leases of 5+ years with even one layout change, the total cost of ownership over 7-10 years typically favours the modular system. At lease end, components can be relocated to a new space or recovered as a depreciating asset.

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Drywall (Traditional Construction)

Lower upfront, but each reconfiguration restarts the cost cycle from demolition. Drywall is written off as waste at each change and again at lease end. For organizations with stable, unchanging layouts, drywall's lifecycle cost is competitive. For anyone who expects to change — it is not.

Advantage: Modular — lower over 7-10 years for organizations that reconfigure —

5. Acoustic Performance​

Demountable Modular Walls

Engineered systems like feco achieve acoustic performance comparable to or exceeding well-built drywall assemblies. feco glass configurations reach approximately 52 dB Rw,P in tested configurations. The critical advantage is consistency: factory-precision seals deliver the specified performance reliably. The weakest point in any partition system is perimeter sealing — in a modular system, this is engineered at the factory, not improvised on-site.

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Drywall (Traditional Construction)

Double-layer drywall with resilient channel can achieve STC 50-55 in laboratory conditions. In practice, site-built acoustic performance is trade-dependent. Penetrations, perimeter seal failures, and installation shortcuts routinely reduce real-world performance by 5-15 STC points below the theoretical rating. The specification is achievable — but consistency is not guaranteed.

Advantage: Comparable peak performance — modular has the consistency advantage —

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Acoustic Performance by Space Type

• Open plan to private office: STC 40-45 minimum. Achievable with both systems in standard configurations.

• Private office to private office: STC 45-50. Achievable with both — requires acoustic glazing specification for glass walls; double-layer board for drywall.

• Boardroom, HR, Legal: STC 50+. feco achieves this in multiple tested configurations up to approximately 52 dB Rw,P. Drywall requires resilient channel plus double board.

• Executive or highly confidential spaces: STC 55+. Both systems achievable with specialist specification. Confirm with an acoustic consultant.

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6. Construction Waste and Sustainability​

Demountable Modular Walls

Near-zero construction waste on installation and reconfiguration. Components are reused, not demolished. feco systems are manufactured under ISO 14001 environmental management standards. Demountable systems contribute to LEED Materials and Resources credits for construction waste management and material reuse. At lease end, components can be relocated rather than sent to landfill.

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Drywall (Traditional Construction)

Drywall demolition generates significant landfill waste on every layout change and at lease end. There is no meaningful recovery value in demolished gypsum board and metal framing. For organizations with sustainability or ESG commitments, the waste cycle of conventional construction is increasingly difficult to justify on repeated renovation projects.

Advantage: Modular — clear advantage on waste, sustainability, and LEED credits —

7. Lease-End Asset Value​

Demountable Modular Walls

At lease end, modular wall components can be disassembled and relocated to a new space, put into storage, or in some cases sold. This creates a recoverable asset value that should be included in any total cost of occupancy calculation. For Canadian commercial tenants, this also has implications for the lease-end reinstatement clause — modular systems can often be removed cleanly without triggering full reinstatement obligations.

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Drywall (Traditional Construction)

Drywall has no recovery value at lease end. It is either abandoned as a leasehold improvement write-off or demolished as part of reinstatement. Every dollar spent on drywall construction is written off over the lease term with nothing recoverable at the end.

Advantage: Modular — recoverable asset vs write-off —

Which Option Is Right for Your Office?

Drywall Is the Better Choice When:

• You are fitting out a short-term lease of 2-3 years with no anticipated reconfiguration

• Your layout is essentially permanent — stable headcount, no restructuring, no growth planned

• Budget constraints make the lower upfront cost non-negotiable and lifecycle cost is secondary

• Your project has no meaningful acoustic requirements beyond basic privacy

• A general contractor is already mobilized and a modular specialist is not available in your timeline

Demountable Modular Walls Are the Better Choice When:

• Your lease is 5+ years and you anticipate any layout changes during that period

• You are in a growth stage — headcount and org structure will change before the lease expires

• Acoustic performance is a business requirement, not a preference — boardrooms, HR, legal, financial, or healthcare-adjacent environments

• You want the ability to recover your fit-out investment when you move premises

• Speed matters — the project timeline cannot accommodate 3-6 weeks of finishing trades

• ESG, LEED, or sustainability commitments make construction waste a documented factor

• You want one accountable partner from specification through installation, not coordinated trades

The Verdict

If this is a one-time, short-lease, fixed-layout office project with no acoustic requirements and a hard budget ceiling: build drywall.

If this is a medium-to-long-term lease, your team or structure will change, acoustic performance matters, and you want a single accountable delivery partner: the lifecycle economics and performance case for a demountable modular system is strong. The upfront premium is real. So is the payback.

Frequently Asked Questions

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How much more expensive are demountable walls than drywall?

Demountable modular walls typically cost 30-70% more to install than drywall, depending on system type, acoustic specification, and whether glass or solid panels are used. This premium is typically recovered after one reconfiguration cycle — for most Canadian commercial tenants on leases of 5+ years, the 7-10 year total cost of ownership favours the modular system.

Can demountable walls achieve the same acoustic performance as drywall?

Yes. Engineered demountable systems like feco achieve acoustic performance comparable to or exceeding well-built drywall assemblies. feco glass configurations are tested to approximately 52 dB Rw,P. The additional advantage is acoustic consistency — factory-precision seals deliver specified performance reliably, whereas drywall acoustic performance is site-dependent and frequently falls below its theoretical rating due to installation variables.

What happens to demountable walls at the end of a lease?

Demountable wall components can be removed and reinstalled in a new space, stored, or in some cases sold. This gives them asset recovery value that drywall does not have. Drywall at lease end is either abandoned as a leasehold improvement write-off or demolished and sent to landfill.

How long does it take to install demountable walls vs drywall?

A prefabricated modular wall installation for a 1,000 sq ft space typically takes 3-7 business days. A comparable drywall installation — including framing, boarding, taping, curing, and painting — typically takes 3-6 weeks. This speed difference has real business value: faster access to your renovated space, less disruption, and lower carrying costs during construction.

Are demountable walls better for the environment than drywall?

Yes, in most measures. Demountable systems generate near-zero construction waste — components are reused, not demolished. Drywall demolition produces significant landfill material on each reconfiguration. feco systems are manufactured under ISO 14001 environmental management standards. For organizations pursuing LEED certification, demountable systems contribute credits in the Materials and Resources category for material reuse and construction waste management.

Do I need a specialist to install demountable walls?

Yes. Demountable modular wall systems are engineered products that require installation teams trained on the specific system. Selectta provides end-to-end supply and installation for feco systems across Canada — design coordination, specification, supply, and installation under one contract.

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Next Steps

If you are weighing demountable walls vs drywall for a specific project, the most useful next step is a direct conversation about your space, lease term, and acoustic requirements. Selectta offers a free 30-minute systems consultation to help you understand which approach fits your situation before any commitment.

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Book a Systems Consultation — discuss your project scope, timeline, and budget with a Selectta specialist.

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Request the feco Spec Pack — acoustic performance data, system configuration options, and specification documentation for the feco platform.