Build It
Fire-Rated.
From The
Frame Up.
For the first time, any wood-framed home can achieve Class A fire protection — without pressure treatment, without specialized equipment, and without compromising structural integrity or natural aesthetics.
Built for the
Entire Project Team.
CitroTech lumber treatment integrates at every stage of the build process — from design to framing to finish. Here's what it means for each role on the team.
A Competitive Edge Built Right In
You're building in WUI zones where buyers are increasingly asking hard questions about fire risk. CitroTech lumber treatment lets you answer those questions before they're asked — and deliver a home that stands apart from everything else on the market.
- No pressure treatment equipment needed
- No construction delays or special permits
- Field or factory applied — fits your workflow
- Reduces liability exposure on fire-risk builds
- Differentiator you can market to buyers
Class A Protection. Zero Design Compromise.
Pressure-treated lumber changes wood aesthetics, limits design flexibility, and adds cost and complexity to your specs. CitroTech penetrates and bonds at the molecular level — the wood looks and performs exactly as designed.
- No design changes required
- Preserves natural grain and wood aesthetics
- Works with OSB, plywood, lumber & mass timber
- Pairs with CitroSafe™ for a two-step protection plan
- Full structural performance maintained
Scale It. Market It. Close Faster.
Whether you're building a single custom home or a WUI subdivision, CitroTech treatment is commercially scalable and factory-ready — meaning you can integrate it into production without slowing your operation.
- Commercial-scale distribution ready
- Seamless integration into existing production
- Class A fire rating across entire project
- Buyers get better insurance options
- Reduces compliance and underwriting risk
Pressure Treatment
Was Never
The Answer.
Requires Specialized Equipment
Pressure treatment requires industrial infrastructure — large tanks, high-pressure systems, specialized facilities. It can't be done on-site or in the field. Everything has to be pre-ordered and pre-treated before it arrives.
Weakens the Wood
The pressure treatment process can compromise the cellular structure of lumber, reducing structural integrity and increasing moisture retention — the opposite of what you want in a load-bearing application.
Limits Design Options
Pressure-treated wood has a distinctive look and chemical smell. It's not appropriate for visible architectural finishes, interior applications, or projects where natural wood aesthetics matter.
Adds Cost and Lead Time
Sourcing pressure-treated materials adds procurement complexity, extends lead times, and creates scheduling risk when supply chains are tight — which in Montana's custom build market, they usually are.
Downstream Liability Exposure
If a home you built burns and the buyer later discovers you had access to Class A fire protection options you didn't offer, that's a conversation you don't want to have. Defensible specs matter.
Apply. Bond.
Defend.
CitroTech's non-pressure, fiber-penetrating chemistry is applied directly to lumber and wood products — in the factory or in the field — and bonds at the molecular level without altering the wood's natural character.
Apply
CitroTech is applied directly to lumber, OSB, plywood, or mass timber — by spray, roll, or dip — in the factory or on the job site. No pressure equipment. No specialized facilities. No disruption to your build schedule.
Bond
The formula penetrates the cellular structure of the wood and bonds at the molecular level. It dries completely clear, preserving the natural grain, color, and aesthetic of the lumber. Structural integrity is fully maintained — in many cases enhanced.
Defend
The treated wood stops flames, resists ember ignition, and reduces smoke generation — meeting Class A fire performance standards under ASTM E84 testing. Protection stays active until removed by significant rainfall or physical weathering.
CitroTech vs.
Pressure Treatment.
| Feature | Traditional Pressure Treatment | CitroTech® Lumber Treatment |
|---|---|---|
| Application method | Industrial pressure tanks only | Spray, roll, or dip — field or factory |
| Structural integrity | Can weaken wood cellular structure | Preserves and can enhance strength |
| Appearance after treatment | Greenish tint, chemical odor | Dries completely clear — natural grain preserved |
| Fire rating achieved | Varies — not always Class A | Class A — ASTM E84 & TER 2504-101 compliant |
| EPA Safer Choice Certified | No | Only product in the U.S. |
| On-site application | Not possible | Field application fully supported |
| Interior & finish applications | Not appropriate for most interior use | Safe for interior — UL Greenguard Gold certified |
| Lead time impact | Pre-order required, supply chain risk | Applied during framing — no schedule impact |
Certifications Your
Clients Will Ask For.
When a buyer, lender, or insurer asks for documentation, you have it. CitroTech meets every standard that matters — environmental, structural, and fire performance.
EPA Safer Choice
The only long-term fire inhibitor in the U.S. recognized by the EPA. Non-toxic formulation.
UL Greenguard Gold
Verified extremely low indoor-air chemical and VOC emissions. Safe for interior applications.
ASTM E84 Extended
Proven flame-spread resistance and fire-safety performance — the standard for Class A ratings.
TER 2504-101
Compliant with International Building Code (IBC) and International Residential Code (IRC) fire-protection requirements.
From Frame
to Finish.
CitroTech lumber treatment integrates across every wood product category in your build — structural and finish alike.
Framing & Structural Components
Dimensional lumber, engineered beams, headers, and structural panels treated at the framing stage. Class A fire protection built into the bones of the structure.
OSB & Plywood Sheathing
Wall and roof sheathing are among the most vulnerable elements in a wildfire. CitroTech treatment applied to OSB and plywood panels significantly reduces ignition risk at the envelope.
Mass Timber & Engineered Panels
For the first time, mass timber and CLT projects can achieve Class A fire performance without altering the aesthetic or structural character that makes these builds distinctive.
Architectural Wood Finishes
Exposed beams, ceiling boards, siding, and decorative elements can be treated without affecting appearance — giving architects and designers full creative freedom alongside fire protection.
Siding & Exterior Cladding
Exterior wood siding is a primary ember-ignition risk. CitroTech treatment applied to siding and cladding creates a first line of defense at the point of greatest vulnerability.
Commercial & Multi-Family
CitroTech scales to commercial projects — multi-family, resort, hospitality, and institutional buildings in WUI zones. Factory application available for large-volume production runs.
Offer Your Clients
Total Protection.
CitroTech lumber treatment is step one of a two-layer protection system. Pair it with a CitroSafe™ exterior sprinkler system and your clients get the most comprehensive wildfire defense available anywhere — built in from day one.
This two-step combination is a genuine market differentiator. No other builder in Montana can offer it. Big Sky Fire Defense handles both — lumber treatment during construction and CitroSafe™ system installation before handoff.
Talk to Us About Your ProjectCitroTech Lumber Treatment
Applied during framing. Class A fire protection built into the structure itself — before walls are closed, before finishes go on, before the client ever moves in.
CitroSafe™ Exterior System
Installed before handoff. A self-contained, remotely activated sprinkler system that deploys CitroTech fire inhibitor across the structure and surrounding vegetation — protecting the home even when the owner isn't there.
The result: A home hardened at the material level and defended at the perimeter level. You deliver the most wildfire-resilient home your buyer can purchase in Montana. That's a closing argument, not just a feature.
What Builders
Ask Us First.
Let's Talk About
Your Next Build.
Tell us about your project — location, size, timeline, and what you're building. We'll put together a treatment plan and quote that fits your schedule and your client's expectations.
Start the ConversationServing builders and architects across Montana, Wyoming, and Northern Idaho