Capture buyer constraints
Specification writers often lock U-factor, SHGC, STC targets, and wind-load language into project manuals. We translate those clauses into fenestration schedules and cladding profiles before shop drawings circulate.
Engineering services
Cornerstone Specification Services for Exterior Building Systems
Architects, developers, and general contractors use Cornerstone service packages to translate U-factor targets, wind-load design pressures, and cladding substrate constraints into auditable fenestration and siding submittals before steel and framing freeze.
Service Matrix Against Project Decision Gates
Each engagement lists deliverables, measurement methods, and the roles that must sign off before purchase orders issue. Thermal conductivity, compressive strength of panel cores, and fire resistance rating pathways are called out where jurisdictions require them.
| Service | What is measured | Project outcome |
|---|---|---|
| Envelope feasibility audit | Whole-window U-factor, SHGC, air leakage, design pressure class, water absorption on cladding samples | Go / no-go on fenestration and siding package before bid packaging |
| Thermal modeling support | Frame contribution, thermal bridging at openings, R-value of adjacent wall assemblies | Energy model inputs aligned with NFRC and IECC climate-zone budgets |
| Coastal / high-wind packaging | Wind load rating, Miami-Dade NOA / Florida Product Approval pathways, impact glazing options | AHJ-ready submittal set for coastal jurisdictions |
| Installation sequencing review | Flashing order, WRB continuity, fastener schedules, expansion gaps for vinyl profiles | Jobsite checklist that protects moisture barrier at openings |
| Warranty documentation desk | Lot traceability, registration completeness, claim status routing | Clear warranty claim pathway for owners and property managers |
Methodology Used on New Construction and Renovation Sites
Whether you are specifying a multifamily shell or replacing windows on occupied housing stock, the same evidence ladder applies from schematic design through closeout.
Model the thermal envelope window
NFRC whole-product values are paired with wall R-value assumptions so thermal conductivity at the opening does not erase insulation gains elsewhere in the assembly.
Coordinate moisture and flashings
Weather-resistive barrier interfaces, sill pans, and head flashings are sequenced so water absorption and vapor drive stay outside the critical path during installation.
Prove the release protocol
Lot labels, coastal approval numbers, and ENERGY STAR qualification sheets travel with the submittal so inspectors can verify claims without stalling hang schedules.
Book a Cornerstone Capability Review
Send drawings, climate zone, design pressure targets, and cladding substrate notes so our engineers can route the correct data package.