What Are the Pros and Cons of Residential Roof Installation?

A full roof installation replaces the entire weatherproof assembly — ice barrier, underlayment, flashing, cover, and ventilation — rather than a single failed detail. It corrects moisture-rotted decking and undersized attic ventilation that a surface cover cannot address, per GAF inspection guidance.

The complete system rebuilds each layer to current standard during tear-off: a Newark Quality Roofing crew sets a self-adhering ice barrier from the eave to a point at least 24 inches inside the exterior wall line per IRC R905.1.2, repairs deteriorated sheathing, and sizes attic ventilation to the NRCA and ARMA standard of 1 square foot of net-free vent area per 150 square feet of attic floor, which extends roof life by up to 25%, per the NRCA. A surface repair on an in-life roof leaves those underlying conditions in place.

Installation to manufacturer specification keeps the manufacturer material warranty intact — typically 20 to 50 years, per Owens Corning warranty guidance — alongside a separate written workmanship warranty on the labor, and a new asphalt roof recoups roughly 60 to 68% of project cost at resale, per a Zillow resale analysis, with 8 of the top 10 highest-ROI remodels being exterior replacement projects, per the Zonda Cost vs Value report.

The drawback of a full installation is its cost: a typical New Jersey home runs $10,000 to $25,000 or more, per HomeAdvisor and Modernize. NJ ranges sit 10 to 40% above national figures because labor accounts for roughly 60 to 70% of an asphalt install and NJ code is stricter, per HomeGuide and Integrity Home Exteriors.

Material class widens that range sharply, because architectural asphalt runs $6.50 to $11.00 per square foot while metal runs $9.00 to $16.00 and slate $10 to $30, per Josten Roofing NJ pricing. A tear-off and deck repair add further cost when the roof carries 2 or more layers or the sheathing is water-soaked, because N.J.A.C. 5:23-6.4 requires complete removal of a multi-layer or water-soaked roof, per the NJ Rehabilitation Subcode.

Heavier materials and roof complexity raise the figure again: slate's substantial weight calls for a structural deck check before install, per the National Slate Association, and valleys, dormers, and hips increase both material and labor over a simple gable roof, per industry cost guidance.

A full installation fits new construction or a new addition, a roof at or past its material life, a rotted deck, or a change of roofing material class. It also fits damage across more than 25 to 30% of the roof area under the contractor-consensus 25% rule (3-tab asphalt lasts 20 years, architectural 30, per InterNACHI).

A single recurring failed detail on an otherwise in-life roof — one length of flashing or a localized leak — favors a targeted roof repair approach rather than a full deck-to-ridge installation, because the surrounding cover still holds remaining service life. A roof past its material lifespan, by contrast, favors the full system over another patch, since the actual asphalt life varies up to 40% with climate, install, and maintenance, per the NRCA.

Before any installation, verify that the contractor holds active New Jersey Home Improvement Contractor registration and carries insurance, because New Jersey registers home-improvement contractors under N.J.S.A. 56:8-136 rather than issuing a roofing license. Newark Quality Roofing is a registered New Jersey Home Improvement Contractor that provides a free written estimate setting the scope, materials, and timeline before work begins.