Question 1

How often should NYC buildings be waterproofed?

Accepted Answer

We recommend re-evaluation every 5-7 years, with maintenance of sealants and coatings as needed to prevent deep structural water entry.

Question 2

How long does a commercial or residential roof last in New York City?

Accepted Answer

Architectural shingles typically last 25 to 30 years, while commercial flat roofing membranes like TPO or multi-ply SBS modified bitumen last 25 to 35 years when maintained with semi-annual inspections.

Question 3

Do I need a NYC Department of Buildings (DOB) permit for roof replacement?

Accepted Answer

Yes, complete roof tear-offs and structural deck alterations require NYC DOB work permits. We handle all architectural filings, engineering reviews, and municipal sign-offs directly.

Question 4

What is the NYC building code rule regarding maximum roofing layers?

Accepted Answer

Under 2022 NYC Building Code §1510.3, a maximum of two roofing layers is allowed before a complete tear-off down to the structural substrate is legally mandated.

Question 5

How do your roofing systems withstand high coastal winds and northeastern storms?

Accepted Answer

Our systems are fastened according to stringent Factory Mutual (FM) 1-90 and 1-120 wind uplift guidelines, featuring reinforced perimeter fastening and 130 MPH rated wind warranties.

Question 6

What is a 'Cool Roof' and is it required by NYC energy codes?

Accepted Answer

Yes, under the NYC Energy Conservation Code, low-slope roofs must achieve high solar reflectance (such as white TPO or reflective coatings) to reduce urban heat island effects and lower cooling costs.

Question 7

How do you detect hidden leaks before replacing the entire roof?

Accepted Answer

We deploy non-destructive thermal infrared imaging and electrical impedance moisture meters to identify wet insulation pockets and track moisture travel paths without tearing up sound sections.

Question 8

Can a roof replacement be completed during NYC winter months?

Accepted Answer

Yes. We utilize cold-weather adhesives, mechanical fasteners, and specialized hot-air welded single-ply membranes that can be reliably installed during freezing temperatures.

Question 9

What warranties do you provide on roofing projects?

Accepted Answer

We provide comprehensive written workmanship warranties of up to 10–25 years, complemented by 20 to 50-year manufacturer material warranties from GAF, Firestone, and Carlisle.

Question 10

How long does a typical roof replacement take?

Accepted Answer

Residential roofs are typically completed in 2 to 3 days. Commercial flat roofs range from 1 to 3 weeks depending on square footage, insulation thickness, and parapet flashing complexity.

Roof Waterproofing