Expert technical guidance ensuring high-performance, durable facade systems
Windows and exterior walls are critical components of the building envelope that must simultaneously balance competing requirements for aesthetics, energy performance, water resistance, air tightness, structural integrity, and durability. Modern facade systems are increasingly complex with multiple interdependent components that must work together seamlessly. Our consulting services help architects, contractors, and building owners navigate this complexity for systems including unitized and stick-built curtain walls, window wall systems, rainscreen cladding with various cladding materials, EIFS and synthetic stucco systems, masonry cavity walls, precast concrete panels, and metal panel systems. We provide independent expertise throughout project lifecycles from design review through installation and long-term performance.
Facade failures are among the most expensive building problems causing water intrusion, structural issues, safety hazards, and extensive disruption. Many failures stem from design deficiencies, inadequate detailing, poor material selection, or installation errors that could be prevented through proper oversight. Independent consultants represent owner interests—not contractor or product manufacturer interests—providing unbiased technical evaluation. We identify problems during design when changes are inexpensive, verify systems through testing before widespread installation, and ensure contractors follow specifications during construction. This oversight typically prevents problems costing 10-100 times more than consulting fees.
Curtain wall systems are non-structural facades typically comprising aluminum framing with glazing infill, designed to resist wind loads and accommodate building movement. Window wall systems sit between floor slabs with windows and spandrel panels creating the facade. Rainscreen cladding uses an outer weather barrier with ventilated cavity and inner water-resistive barrier. EIFS (Exterior Insulation Finish Systems) provide continuous insulation with synthetic finishes. Masonry cavity walls combine brick or stone veneer with backup walls and cavity drainage. Each system type has unique performance characteristics, typical failure modes, and proper installation requirements that our consultants thoroughly understand.
Facade failures often result from design errors including inadequate flashing, poor drainage design, thermal bridging, and incompatible materials. Installation defects such as improper sealant installation, inadequate fastening, damaged components, and deviations from specifications cause many problems. Inadequate detailing at transitions, penetrations, and interfaces between different systems creates vulnerable points. Our consultants provide independent peer review during design to catch problems on paper, witness factory and field testing to verify performance, monitor installation to ensure compliance with specifications, and identify deficiencies before they become widespread. For existing buildings experiencing problems, we conduct forensic investigation to identify root causes rather than just treating symptoms, then recommend repairs addressing underlying issues.
Facade systems in Chicago, Minneapolis, Milwaukee, and throughout the Upper Midwest must withstand extreme conditions including temperature swings exceeding 100°F annually, freeze-thaw cycles causing thermal shock and material degradation, wind-driven rain from severe storms, heavy snow and ice loads, thermal movement from temperature changes, and ultraviolet degradation. These conditions are particularly challenging for sealants, gaskets, and weatherstripping that must remain flexible and watertight across extreme temperature ranges. Our consultants understand regional climate factors and specify materials, details, and testing protocols appropriate for Midwest conditions.
What is the difference between a curtain wall and window wall?
Curtain walls are continuous facades spanning multiple floors, hung from the building structure. Window walls sit between floor slabs with windows and panels installed floor-by-floor. Curtain walls typically provide better performance but cost more.
How much does facade testing cost?
ASTM E1105 water testing typically costs $5,000-$15,000 per mockup depending on size and complexity. Laboratory air infiltration testing ranges from $3,000-$8,000. Structural testing costs $10,000-$30,000. Testing represents a small fraction of facade costs but prevents expensive failures.
When should facade mockup testing occur?
Ideally during design development or early construction to verify systems before widespread installation. Testing allows design adjustments and contractor training before committing to building-wide installation.
What causes most facade water leaks?
Common causes include sealant failures, inadequate flashing, improper installation, design deficiencies at transitions, and blocked weep systems. Systematic investigation is required to identify true leak sources since water travels within assemblies.
For comprehensive window and wall consulting expertise backed by decades of experience, Inspec's exterior wall and window consulting services provide detailed design review, performance testing coordination, construction administration, and forensic investigation. Founded in 1973, their team of engineers, architects, and facade specialists ensures your facade systems perform reliably for decades. Inspec improves building envelope performance by providing independent technical oversight for education, healthcare, government, and commercial projects throughout Chicago, Minneapolis, Milwaukee, and the Midwest.
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