Commercial Shingle Roof Replacement

It is a permitted replacement of the complete steep-slope roof assembly for a commercial, association, multifamily, institutional or group-owned property. The scope should address removal, deck condition, secondary water resistance, underlayment, starter, field shingles, hip and ridge, flashing, ventilation, mixed-roof transitions, pressure-zone fastening, inspections, documentation and warranty terms.

They can be appropriate on commercial buildings with steep-slope roof areas when slope, building height, exposure, deck, fire classification, product approval, attachment and maintenance objectives support the selected assembly. Flat or low-slope areas require a different roof system.

High-rise and taller-building applications require careful product-approval and engineering review. In Florida’s High-Velocity Hurricane Zone, asphalt shingles are generally limited to a 33-foot mean roof height unless the specific product approval expressly permits otherwise.

The fastening pattern must follow the current product approval, manufacturer instructions and applicable code. In the HVHZ, RAS 115 requires no fewer than six approved nails per shingle and places additional requirements on nail type, penetration and perimeter detailing.

The field shingle is only one component. A complete system may include deck attachment, seam tape or another secondary-water-resistance approach, underlayment, leak barrier, starter, field shingles, hip and ridge, ventilation, flashing, drip edge and accessory products required by the approved assembly or warranty.

Recovery is not automatically acceptable. Existing layers, moisture, deck condition, slope, fire classification, fastening, product approval and jurisdictional rules must be reviewed. In the HVHZ, asphalt shingles cannot be recovered over wood shingles, shakes, slate, tile or metal shingles.

Wind uplift is often more demanding at roof edges and corners. The approved system may require different fastening, adhesive, starter, perimeter or deck-attachment details by zone. A single generic nailing pattern should not be assumed for every building.

Secondary water resistance is a qualifying water-control layer beneath the roof covering intended to reduce water intrusion if the shingles are damaged or displaced. Seam tape, self-adhered deck membrane and other configurations are not automatically equivalent; the exact assembly and documentation control.

Shingles require a solidly sheathed, nailable deck. Rotten wood, loose sheathing, raised joints, inadequate fastener engagement, prior repairs and concealed moisture can change the scope, cost and approved fastening performance.

Yes. Tile may provide thermal mass and an air space beneath the covering. A direct-to-deck shingle assembly may transfer heat differently. Color, reflectance, attic ventilation, insulation, radiant control and duct location should be evaluated rather than assuming the new roof will perform the same.

The shingle and low-slope systems should be designed together at transitions, walls, valleys, saddles, drains, scuppers, curbs and rooftop equipment. The proposal should identify which contractor and manufacturer control each interface.

Large projects should approve physical samples, define blend expectations, control manufacturing lots where practical, document substitutions and retain labeled repair stock. Computer screens and small sample boards may not show full-roof color variation.

No. A laboratory impact classification is not a promise that the roof is hail-proof, and an insurance carrier decides whether a specific product, documentation and policy qualify for a credit. Aastro cannot guarantee a premium reduction or underwriting result.

Warranty terms differ from single-family residential terms. Some manufacturers publish separate group-owned or commercial limited warranties. The exact product, components, contractor credential, registration, owner type, maintenance and written warranty control.

The proposal should identify the exact shingle and accessories, deck and wood procedure, underlayment and secondary water resistance, starter, ridge, ventilation, fastening, flashing, mixed-roof transitions, phasing, protection, permits, inspections, cleanup, unit prices, exclusions and warranty pathway.

Aastro evaluates leak history, age, material brittleness, matching availability, deck and moisture condition, storm evidence, repeated repairs, roof geometry, insurance documentation, ownership horizon and the condition of the complete roof assembly.

A manufacturer name does not define the complete commercial shingle assembly. Proposals can differ in the exact shingle family, starter, ridge, secondary water resistance, underlayment, ventilation, deck work, fastening by roof zone, flashings, mixed-roof transitions, color-lot controls, allowances, warranty pathway and closeout documentation. Compare the complete written assembly and scope, not the brand name alone.

The transition should be designed as one coordinated roof interface. The scope should identify membrane height and termination, drainage, flashing sequence, substrate and deck conditions, trade responsibility, compatible materials, manufacturer requirements and which party owns the warranty at the transition. A shingle proposal should not treat the low-slope area as an unrelated afterthought.