Compare – WeatherWeld Commercial Roofing.

Here’s Why WeatherWeld Is Not Just
Your Best Roof…But Your Last Roof

Only WeatherWeld technology provides a roof solution with no seams, no joints…no leaks. Unlike other roof types that provide potential openings for water to penetrate, it’s designed for a total line of defense that can outlive your building. Make the comparisons, and you’ll agree that WeatherWeld is simpler, stronger, better.

Commercial Roofing Technology Comparison - Built Up & Modifieds
MORE SEAMS
Built-Up & Modifieds
Commercial Roofing Technology Comparison - Single Ply
LESS SEAMS
Single Ply
Commercial Roofing Technology Comparison - WeatherWeld
NO SEAMS
WeatherWeld

Performance Metrics

Many factors affect the quality and reliability of your roof, from its strength and stretch, to the load strain, thickness and the detail that goes into the installation. Not only does the WeatherWeld roof system provide seamless coverage that eliminates leaks, but it also shows its superiority in a wide range of key performance categories. We invite you to review the industry comparison numbers that bear out the wisdom of selecting a long-lasting WeatherWeld roof.

Download Comparison PDF

infographic weatherweld seamless roofing

Investment

Reducing the labor cost portion gives you more value for the price. And because WeatherWeld manufactures its product on-site to eliminate middle man fees and puts a greater percentage of its cost into the all-important raw materials, rather than permits, taxes and other overhead, you get a better quality roof for less money. The following graphs show the average percentage investment spent on labor costs versus materials for the most common commercial roofs.

Built Up: 94% / 6%

Modified Bit: 94% / 6%

Single Ply: 94% / 6%

WeatherWeld: 75% / 25%

Longevity

Stretch

Roof material is tested at 77 degrees Fahrenheit, stretched 1 inch per minute, to project its performance under years of stress – the higher the percentage, the better.

Strength

Historically roofs have been required to have at least 200 lbs. of strength per inch of width to avoid failure, which typically occurs on West Coast buildings at approximately 125 lbs.

  • Built up Roof 1-3%
  • Modified 10%
  • Single Ply 10%
  • WeatherWeld 10%
Built-Up 200lbs.
Modified 150lbs.
Single Ply 125lbs.
WeatherWeld 300lbs.

Trouble Free

Combined Thickness

Strength, thickness, and flexibility are critical factors for long-term durability.

Built Up: 180 mils
Modified: 180 mils
Single Ply: 60 mils
WeatherWeld: 300 mils

Load Strain / Trouble Free Life

Stretch fatigues like a rubber band. Strength resists strain without stretch, like steel. Thus, higher load strain numbers indicate longer life, without system fatigue.

  • Built-Up: 200 lbs
  • Modified Bit: 150 lbs
  • Single Ply: 125+ lbs
  • WeatherWeld: 300 lbs

Installation Time

On-Site Installation Time

Based on a 30,000 sq. ft. building, with 2 ACs, skylights, ventilation and lighting – 5 installers.

Measured in Days

  • Built Up
  • Modified
  • Single Ply
  • WeatherWeld

Weight per Sq. Ft.

The key to safety is to use a roof material that is very strong, yet doesn’t overburden the structure.

Lbs per Sq. Ft.

  • Built Up: 2.2 lbs
  • Modified: 1.45 lbs
  • Single Ply: 0.7 lbs
  • WeatherWeld: 1.5 lbs

WeatherWeld 30 year Modified Bitumen (APP) Modified Bitumen (SBS)
Construction Reinforced Self Sealing Seamless Composite 3 Ply Laminated All Modified Materials 3 Ply Laminated All Modified Materials
Waterproofing Weathering Grade Bentonite Protected Pure Asphalt Asphalt with APP Asphalt with SBS
Reinforcement Multifilament Omni-Directional Long Strand Fiberglass Polyester / Fiberglass Polyester / Fiberglass
Thickness* (1/100") 280 180 180
Load Strain** 3000 1800 1600
Tear Strength x Elongation 300 x 10 180 x 10 160 x 10
Odorless / Safe / No Disruption Odorless, Cold, No Noise, or Disruption Torch, Solvent, or Hot Asphalt Solvent or Hot Asphalt
Fireproofing Safety Retained*** Yes, UL Class A Fire Rating May not. (NRCA Bulletin Regarding Fire Ratings) May not. (NRCA Bulletin Regarding Fire Ratings)
Warranty Coverage Leak Trigger Full Coverage, No Exclusions For Standing Water, Repairs, Maintenance, Transfers Defective Wear Trigger, Excluded Coverages Defective Wear Trigger, Excluded Coverages
Warranty Period 25 Years 20 Years 20 Years
Cost Per Mil. of Roof Installed
(Based on WeatherWeld 40)
1.39x 2.16x 2.16x

WeatherWeld 30 year Built-Up 3 Ply Capsheet Built-Up 4 Ply Capsheet
Construction Reinforced Self Sealing Seamless Composite 3 Ply Laminated 4 Ply Laminated
Waterproofing Weathering Grade Bentonite Protected Pure Asphalt Hot or Solvent Asphalt Hot or Solvent Asphalt
Reinforcement Multifilament Omni-Directional Long Strand Fiberglass Single Fine Filament Fiberglass Single Fine Filament Fiberglass
Thickness* (1/100") 280 155 240
Load Strain** 3000 320 400
Tear Strength x Elongation 300 x 10 160 x 2 200 x 2
Odorless / Safe / No Disruption Odorless, Cold, No Noise, or Disruption Solvent or Hot Asphalt Solvent or Hot Asphalt
Warranty Coverage Leak Trigger Full Coverage, No Exclusions For Standing Water, Repairs, Maintenance, Transfers Defective Wear Trigger, Excluded Coverages Defective Wear Trigger, Excluded Coverages
Warranty Period 25 Years 15 Years 20 Years
Cost Per Mil. of Roof Installed
(Based on WeatherWeld 40)
1.39x 2.51x 1.62x

WeatherWeld 30 year Single Ply PVC 60 Mill & Board Single Ply TPO 60 Mill & Board
Construction Reinforced Self Sealing Seamless Composite Single Layer Hot Air Seam Sealed Single Layer Hot Air Seam Sealed
Waterproofing Weathering Grade Bentonite Protected Pure Asphalt PVC Plastic TPO Plastic
Reinforcement Multifilament Omni-Directional Long Strand Fiberglass Polyester / Fiberglass Polyester
Thickness* (1/100") 280 60 60
Load Strain** 3000 1000 1250
Tear Strength x Elongation 300 x 10 100 x 10 125 x 10
Odorless / Safe / No Disruption Odorless, Cold, No Noise, or Disruption Toxic Fumes Melting Seams, 900 degree Fahrenheit Heat on Roof, Screw Noise Toxic Fumes Melting Seams, 900 degree Fahrenheit Heat on Roof, Screw Noise
Fireproofing Safety Retained*** Yes, UL Class A Fire Rating May not. (NRCA Bulletin Regarding Fire Ratings) May not. (NRCA Bulletin Regarding Fire Ratings)
Warranty Coverage Leak Trigger Full Coverage, No Exclusions For Standing Water, Repairs, Maintenance, Transfers Defective Wear Trigger, Excluded Coverages Defective Wear Trigger, Excluded Coverages
Cost Per Mil. of Roof Installed
(Based on WeatherWeld 40)
1.39x 6/51x 6.51x

*Not including granules or reflective coating
**Tear strength x usable elongation. Weakest strength between field or seam used. Elongation greater than 10% considered the practical limit of use on typical roof decks
***Based on 1996-2006 MWRCA & NRCA Aged Fire Rating Loss Studies. Results are representative. Check with Manufacturer to determine results of individual products.