ICF Construction
Spokane's ICF Building Experts
Insulated Concrete Form (ICF) construction delivers unmatched energy efficiency, fire resistance, and durability. 2Work Contracting is the Inland Northwest's trusted ICF builder — from foundations to full custom homes.
Authorized BuildBlock ICF Installer
What is ICF Construction?
Insulated Concrete Forms (ICFs) are hollow, interlocking foam blocks that create the formwork for reinforced concrete walls. Once stacked, braced, and filled with concrete, the result is a monolithic concrete wall sandwiched between two continuous layers of rigid EPS insulation.
The system combines the structural strength of reinforced concrete with the thermal performance of continuous rigid insulation — delivering a wall assembly that outperforms traditional construction in virtually every measurable category: energy efficiency, fire resistance, sound blocking, wind resistance, moisture management, and longevity.
Why 2Work for ICF?
- Experienced ICF installer with BuildBlock systems
- Deep understanding of concrete placement in ICF forms
- Licensed in WA (#2WORKL*770LA) and ID (#RCE-68963)
- Full-service: design coordination through finishing
- Serving Spokane, CDA, and the Inland Northwest
The ICF Advantage
ICF construction outperforms traditional building methods in every category that matters for long-term comfort, safety, and value.
Energy Efficiency
ICF walls deliver R-23+ continuous insulation with virtually zero thermal bridging. Homeowners typically see 50–70% reductions in heating and cooling costs compared to traditional stick-frame construction.
Fire Resistance
Reinforced concrete core provides a 4-hour fire rating — far exceeding the 1-hour rating of standard wood framing. ICF structures resist ignition, flame spread, and structural collapse.
Sound Reduction
ICF walls achieve STC ratings of 50+ compared to 33–35 for standard stud walls. Concrete mass blocks airborne sound transmission, creating noticeably quieter interiors.
Wind & Storm Resistance
ICF structures withstand winds up to 250 mph and resist damage from flying debris. Ideal for storm-prone areas and built to exceed IRC wind load requirements.
Moisture Resistance
Concrete does not rot, mold, or deteriorate from moisture exposure. The continuous foam insulation eliminates condensation points, preventing mold growth inside wall assemblies.
Durability & Longevity
ICF structures are built to last 100+ years with minimal maintenance. Concrete does not warp, shrink, settle, or degrade like wood framing. Termite-proof and pest-resistant.
ICF Applications
ICF Foundations
The most common ICF application. Replace traditional poured or block foundations with insulated concrete form walls for superior moisture resistance, insulation, and structural integrity. Ideal for finished basements.
- R-23+ basement walls from day one
- Eliminates cold concrete basement floors
- Superior moisture and crack resistance
- Ready for direct finishing — no furring strips needed
Ideal For
New construction foundations, basement finishing prep, below-grade walls in any climate, walkout basements, and daylight basements on sloped lots.
ICF Custom Homes
Build your entire home with ICF from foundation to roofline. ICF homes are quieter, more energy-efficient, and more durable than any stick-frame home. We build complete ICF residences throughout Spokane and North Idaho.
- 50–70% energy savings vs. stick frame
- 4-hour fire rating on all exterior walls
- STC 50+ sound blocking on every wall
- 100+ year structural lifespan
Ideal For
Custom home builds, energy-conscious homeowners, high-performance homes, passive house candidates, and homeowners seeking long-term value and comfort.
ICF Additions & ADUs
Accessory dwelling units, home additions, and in-law suites built with ICF for maximum performance. Tie new ICF walls into existing structures for seamless, energy-efficient expansions.
- Perfect for rental income ADUs
- Meets all local ADU building codes
- Superior comfort in attached spaces
- Reduces HVAC load on existing systems
Ideal For
Accessory dwelling units (ADUs), mother-in-law suites, home additions, garage conversions, and any space where comfort and efficiency matter.
ICF Garages & Shops
Heated shops, detached garages, and outbuildings built with ICF stay warm in winter and cool in summer with minimal energy input. Concrete walls resist impact, fire, and moisture.
- Climate-controlled workspace year-round
- Fire-resistant storage for vehicles & equipment
- Impact-resistant walls for workshop use
- Minimal heating costs even in Spokane winters
Ideal For
Heated workshops, car storage, hobby shops, home gyms, studio spaces, and any detached building where climate control and durability are priorities.
BuildBlock ICF Systems
We build with BuildBlock Insulating Concrete Forms — a premium ICF system engineered for precision, performance, and ease of construction. BuildBlock forms feature an advanced interlocking design that ensures tight, consistent wall assemblies.
- Precision-molded EPS foam with consistent density
- Reversible, symmetrical blocks reduce waste and speed installation
- Integrated web system accepts standard fasteners for finishing
- Full product line: straight walls, 45° & 90° corners, radius forms
- Ledger and brick ledge accessories for versatile connections
- ICC-ES evaluated and code-compliant nationwide
The ICF Construction Process
Consultation & Site Assessment
We evaluate your site, discuss your project goals, review soil conditions, and determine the optimal ICF approach for your build. We explain the ICF process and provide a transparent, detailed estimate.
Engineering & Design
Structural engineering for ICF walls, rebar placement schedules, lintel and ledger details, and coordination with your architect or designer. We ensure every detail is engineered for performance.
Form Stacking & Bracing
BuildBlock ICF forms are stacked, leveled, and braced with precision. Rebar is placed per engineering specs. Window and door bucks are set. Every course is checked for plumb and alignment.
Concrete Placement
Concrete is pumped into the ICF forms in controlled lifts to prevent blowouts. Vibration ensures full consolidation around rebar and through form cavities. This is where craftsmanship matters most.
Strip & Prep
Bracing is removed, foam is trimmed and shaped, and the structure is prepared for the next phase — whether that's framing the roof, interior finishing, or waterproofing below grade.
Integration & Finishing
ICF walls integrate with standard roof framing, interior finishing, siding, stucco, or stone veneer. The result is a building that looks like any custom home but performs like a fortress.
ICF vs. Stick Framing
How ICF construction compares to traditional wood-frame building.
| Feature | ICF Construction | Stick Framing |
|---|---|---|
| Insulation Value | R-23+ continuous (no thermal bridging) | R-13 to R-21 (significant thermal bridging at studs) |
| Fire Rating | 4-hour fire rating | 1-hour fire rating (with drywall) |
| Sound Transmission (STC) | STC 50+ (very quiet) | STC 33–35 (standard) |
| Wind Resistance | Up to 250 mph | Up to 130 mph (with hurricane straps) |
| Pest Resistance | Concrete core — termite & pest proof | Vulnerable to termites, carpenter ants |
| Moisture Resistance | Concrete does not rot or mold | Wood framing susceptible to rot & mold |
| Structural Lifespan | 100+ years | 50–80 years with maintenance |
| Energy Costs | 50–70% lower heating/cooling | Baseline |
| Insurance Premiums | Often 15–25% lower | Standard rates |
ICF vs. Traditional Foundations
Why ICF foundations outperform standard poured concrete or block foundations.
| Feature | ICF Foundation | Traditional Foundation |
|---|---|---|
| Insulation | R-23+ built-in, ready to finish | R-0 (requires separate insulation) |
| Moisture Protection | Continuous foam + concrete = no condensation | Requires separate vapor barrier & insulation |
| Crack Resistance | Rebar-reinforced concrete resists cracking | Poured walls prone to shrinkage cracks |
| Finishing Basement | Direct-attach drywall to foam surface | Requires furring strips, insulation, vapor barrier |
| Energy Performance | Warm, dry basement from day one | Cold concrete walls, high heat loss |
| Construction Speed | Forms stack quickly, single concrete pour | Form setup, pour, strip, waterproof, insulate |
ICF Construction Gallery
ICF Construction FAQs
Related Services
Full Home Remodel
Whole-house renovations that can incorporate ICF additions and structural upgrades.
Learn MoreBasement Finishing
Finish your ICF basement into premium living space — bedrooms, bathrooms, and more.
Learn MoreKitchen Remodeling
Complete kitchen renovations as part of your new ICF home or addition.
Learn MoreReady to Build With ICF?
Whether it's an ICF foundation, custom home, addition, or shop — we'll help you understand the process, the costs, and the long-term benefits.
Licensed & Insured — WA #2WORKL*770LA | ID #RCE-68963 | 11+ Years Experience