Overview
Commercial new construction roofing is not a commodity. The system you specify — and the contractor who installs it — determines whether you carry a 20-year NDL warranty or a 5-year repair cycle. At Evangel, we engage at the pre-construction phase: reviewing structural drawings, coordinating with the general contractor, and selecting the membrane and attachment method that matches your building's use, climate exposure, and long-term performance expectations. We work with product lines from Carlisle, Versico, Johns Manville, and GAF — systems with a decades-long track record in commercial construction.
Our Process
Pre-Construction Consultation
We review your building plans, structural load capacity, anticipated rooftop equipment, and operational use to select the optimal system before materials are ordered. Getting this right before groundbreak eliminates costly change orders and warranty conflicts at closeout.
System Specification & Procurement
We source certified materials from approved manufacturers — matched to your project's performance requirements and warranty tier. Material submittals are provided for GC and architect review. No substitutions without written approval.
Deck Preparation & Insulation
A properly prepared substrate is the foundation of a 20-year roof. We inspect deck fastener patterns, install tapered insulation for positive drainage, and address substrate irregularities before membrane goes down. Tapered insulation is detailed to code-required minimum slope.
Membrane Application
Single-ply membranes are installed via the manufacturer-approved attachment method for your deck type: mechanically fastened, fully adhered, or induction-welded. Each method has specific pull-out requirements; we test and document to manufacturer spec.
Penetrations, Flashing & Drainage
HVAC curbs, pipe penetrations, parapet walls, and scuppers represent the highest-risk areas on any commercial roof. Every penetration is flashed per manufacturer detail — photographed and documented for the warranty file.
Quality Inspection & Warranty Registration
Final walkthrough with photographic documentation of all seams, flashings, and penetrations. Manufacturer warranty registered at job closeout. Complete project documentation package delivered to the owner — ready for future buyers, lenders, and insurance carriers.
Sectors Served
Retail & Mixed-Use
Strip centers, big-box anchors, mixed-use ground floors
Warehouse & Distribution
High-bay facilities, cold storage, fulfillment centers
Medical & Professional Office
MOBs, multi-tenant office parks, outpatient facilities
Data Centers
Mission-critical environments with strict penetration protocols
Government & Public Works
Municipal buildings, schools, correctional facilities
Multifamily
Mid-rise apartment decks, parking structure roofs, podium levels
Capabilities
- Ground-up commercial builds and mixed-use developments
- Coordination with GCs and structural engineers on deck specifications
- Multi-building campus and phased installation scheduling
- Cold-weather installation protocols: heated adhesives, membrane conditioning
- ENERGY STAR and LEED-compatible system options
- Data center and mission-critical facility experience
- Government, municipal, and public works certified
- NDL warranty registration — Carlisle, Versico, Johns Manville, GAF
Ready to discuss your project?
Evangel provides free on-site assessments for qualified commercial properties within 150 miles of Kansas City.
Request a Free Estimate