Delta Innovative Services, Commercial Roofing Contractor, Kansas City, Kansas
508 S. 14th Street
Kansas City, KS 66105
913-371-7100
Delta Innovative Services, Commercial Roofing Contractor, Kansas City, Kansas
 

Flat Roof Systems

Commercial Roofing, Delta Innovative Services, Kansas City

  

  

Delta Innovative Services can install roofs anywhere, anytime, and any place. Our Project Portfolio includes high schools, hospitals, warehouses, apartment complexes, strip centers, manufacturing plants, military installations, federal government facilities, aviation facilities, and shopping malls.

Commercial Flat Roofs

Commercial Roofing, Delta Innovative Services, Kansas City

We specialize in built-up tar and gravel and modified bitumen (multi-ply) roofing systems. We can add slope to existing flat roofs, and we offer custom-designed energy-efficient insulation systems. We also install Energy-Star rated coating systems, shingles, concrete or clay tile, slate, stone-coated metal panels, standing-seam metal panels, and exposed fastener metal panels. We have factory-trained technicians, for the installation, scheduled maintenance and repair of all types of roofing systems.

Single-Ply Roofs

Commercial Roofing, Delta Innovative Services, Kansas City

Properly installed single-ply roof systems have service lives ranging from about 10 years to 20 years, depending upon the type of installation. When deciding whether a single-ply membrane roofing system is right for you, it is important to first consider whether the building is suited for a single ply membrane at all. Generally, single ply membrane roofing is appropriate when weight is a consideration, the roof has adequate slope, structural movement is expected, and the installation involves recovering an existing membrane or installing in cold weather.

Built-Up Roof (BUR)

Commercial Roofing, Delta Innovative Services, Kansas City

A built-up roof consists of multiple plies of roof felts, laminated together with bitumen. Built-up roof material can include layers of bitumen-saturated felt, coated felt, polyester felt or other fabric. A surfacing is generally applied and can be asphalt, aggregate (gravel or slag), emulsion or a granule-surfaced cap sheet.

Built-up roofing systems are one of the oldest and most durable systems available, due in large part to their success and proven reliability. These roof systems are commonly referred to as tar and gravel roofs. They are typically composed of alternating layers of bitumen and reinforcing fabric which creates a finished membrane. Multiple layers provide extra protection and perform well in extreme weather conditions. Built-up roofs are especially resistant to damage from wind, hail and driving rain.

Commercial Roofing, Delta Innovative Services, Kansas City

Built-up roofing systems are easy to repair, and are ideally suited for applications requiring a high level of redundancy. The number of plies in a cross-section is the number of plies on a roof. A four-ply built-up roof has a four-ply roof membrane construction. Sometimes a base sheet, used as the bottom ply, is mechanically fastened. Built-up roofs generally are considered to be fully-adhered when applied directly to roof decks or insulation. A built-up (BUR) roofing system is the right choice if your building was originally constructed with a BUR roofing system. Most commercial properties were built using a built-up roofing system.

Considerations

  • Full removal of the existing roof is often indicated.
  • A new Built-up roof will last longer with removal of the old roof (down to the deck, prior to installing the new one), because damaged decking can identified and repaired.
  • Local weather conditions contribute to the longevity of service life for a built-up roof.
  • The steeper the slope and the less severe the weather conditions, the longer a roof will last. High winds and hail can compromise a roof in rather quickly.
  • The most important contributor to a good roof system is proper installation.

Warranty

  • The manufacturer of the products used in your built-up roof will provide a warranty that covers defects in the manufacture of the roof membrane. When your project is complete, we will provide you with a certificate so that you can register the manufacturer's warranty.
  • We will provide you with a warranty covering our workmanship. This will cover installation and related issues. The warranty identifies what items are covered, and what will void them.

Advantages of a Built-Up Roofing System.

Modified Bitumen Roof

Commercial Roofing, Delta Innovative Services, Kansas City

Modified bitumen is asphalt with added modifiers to give it a plastic or rubber-like property. Common types of modifiers are Atactic Polypropylen (APP) and Styrene Butadiene Styrene (SBS). Rolls of modified bitumen membrane cover an area of over 100 square feet. Surfacing s for these roll materials consist of mineral granules, aluminum, copper, or an aggregate such as gravel or slag. Modified bituminous roof membranes continue to be popular option for low-sloped roofs, due to their proven performance. Historically these products have been torch-applied, mop-applied using hot asphalt, or applied with solvent-based adhesives.

Additional information about APP and SBS Modified Bitumen Roofs

Commercial Roofing, Delta Innovative Services, Kansas City

Polymer-modified bitumen sheets are made with polyester and/or glass-fiber reinforcements. Most manufacturers of Modified Bitumen produce material with reinforcements that are filled, saturated or coated with very fine minerals, such as sand, mica or talc. All polymer-modified bitumen coated sheets are factory-coated on one or both sides with modified bitumen. The sheets are surfaced on one or both sides with sand, mica or talc. The polymer-modified bitumen sheets are produced in a variety of weights, and with a variety of reinforcements. Many smooth-surfaced sheets are used as base sheets, inter ply sheets and top ply sheets in multiple-ply modified bitumen membranes. Granule-surface and metal-foil laminate sheets generally serve as cap and flashing sheets. Once all steps have been completed, flashings are then applied. This provides waterproofing around the roof perimeter, equipment and projections.

Components of a Modified Bitumen Roofing System

  • The R-Value. Insulation provides the R-Value value and stable substrate for the roof system.
  • Modified Base Sheet/Ply. Either a modified or unmodified base or ply sheet used under a modified bitumen top ply.
  • Modified Bitumen Membrane. A factory fabricated sheet consisting of a copolymer modified bitumen, typically reinforced with polyester fiber glass of a composite carrier.
  • Adhesive. Actual waterproofing material and bonding agent that is applied either hot or cold.
  • Surfacing. Provides UV protection and a weathering surface that can be either factory or field applied.

Advantages of a Modified Bitumen Roofing System.

Single-Ply Roof (EPDM, PVC, TPO)

Commercial Roofing, Delta Innovative Services, Kansas City

Several highly-successful Single-Ply roof membrane products hit the roofing market in the 1970's. Built-up roofs met with some stiff high-tech competition. The single-ply roofs typically contain a rubber or polymer membrane.

Thermoplastic Olefin/Polyolefin Thermoplastic (TPO) and Polyvinyl Chloride (PVC) roof membranes, are flexible sheet materials that are used in one-ply or one-layer configurations. Constructed from ethylene propylene rubber, the thermoplastic roof membrane's chemical and physical characteristics allow it to repeatedly soften when heated and harden when cooled. Additionally, because of the chemical nature of thermoplastic membranes, the sheets are typically seamed by heat welding with hot air.

Properly installed single-ply roof systems have service lives ranging from about 10 years to 20 years, depending upon the type of installation. When deciding whether a single-ply membrane roofing system is right for you, it is important to first consider whether the building is suited for a single ply membrane at all. Generally, single ply membrane roofing is appropriate when weight is a consideration, the roof has adequate slope, structural movement is expected, and the installation involves recovering an existing membrane or installing in cold weather.

EPDM Roof

Ethylene Propylene Diene Monomer (EPDM) Terpolymer is simply a product consisting of three distinct monomers. EPDM is classified as a Thermoset material, which means it is either fully-cured prior to being installed, or that it cures during natural weathering after installation. EPDM roofs are single-ply membranes — there is only one ply of roofing material, not multiple plies laminated together.

Commercial Roofing, Delta Innovative Services, Kansas City

EPDM is a rubber material whose principal components consist of the compounds ethylene and propylene. A flexible rubber matrix forms when a small amount of diene is added to the mix. EPDM is available reinforced or unreinforced with both commonly used; it's also available in either a cured (vulcanized) or uncured (non-vulcanized) state. Vulcanized EPDM is the most common with non-vulcanized often used for flashing purposes.

EPDM has been used in the USA since the 1960's. It is one of the most common types of low-slope roofing materials available, because it is relatively inexpensive, simple to install, and fairly clean to work with, when compared to conventional built-up roofs. There aren't the odors and fumes that accompany built-up roofs, which appeals to many property owners and managers.

PVC Roof

Polyvinyl Chloride (PVC) membrane is a roof membrane composed of only one layer of material. PVC roofs are specially designed to withstand ponding water. A PVC membrane is welded together with hot air (no open flame) to eliminate all seams so moisture can not pass through. PVC roofing systems reflect nearly 90% of the radiant heat of the sun, thus lowering energy costs substantially, especially in high-heat and high-sunlight areas such as the southwestern United States.

Commercial Roofing, Delta Innovative Services, Kansas City
Strengths
  • Fire-safe material
  • Energy Efficient
  • Good weather resistance
  • Good long-term performance for a low slope roof.
Limitations
  • Not intended for high rain or snow areas.

TPO Roof

Thermoplastic Olefin or Polyolefin (TPO) membranes are single-ply roof membranes constructed from ethylene propylene rubber. They are designed to combine the durability of rubber with the proven performance of hot-air weldable seams. They have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install.

Commercial Roofing, Delta Innovative Services, Kansas City

The material's manufacturers are so confident in properly welded seams that the material is sometimes advertised as a monolithic (seamless) roof. Seam strengths are reportedly 3 to 4 times those of EPDM's adhesive and tape seams. TPO is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement. TPO's are available in white, light gray, and black with thicknesses of either 45 mils (.045") or 60 mils (.060"). The width of the membrane depends on the manufacturer but they usually come in widths of six to six-and-a-half feet and are one-hundred feet in length.

TPO membranes are installed fully-adhered, mechanically-attached or ballasted. Fully-adhered means that the roof is glued to the substrate using a special adhesive. What actually happens is the glue creates a chemical bond with the membrane. Ballasted simply means the membrane is loose laid over the top of the roof, sealed at all penetrations and around the perimeter, and then a ballast is put on it to hold it in place.

Ballast usually consists of smooth, round, river rock 2" to 3" in diameter and is applied at a rate of 1,000 to 1,200 pounds per roof square. Sometimes concrete pavers are used in their place. These average 20 pounds per square foot. Mechanically-attached membranes are those that use some type of special screw-type fastener to secure it. The type of fastener will depend on the type of substrate but all fasteners are generally screw-type fasteners.

Considerations
  • Fully-adhered means that the roof is glued to the substrate using a special adhesive, where the glue creates a chemical bond with the membrane.
  • Mechanically-attached membranes are those that use some type of special screw-type fastener to secure it. The type of fastener will depend on the type of substrate, but all fasteners are generally screw-type fasteners.

Advantages of TPO Roofing Systems.

Commercial Roofing, Delta Innovative Services, Kansas City 2018 IKEA

Project Gallery

Delta Innovative Services, Commerial Roofing Projects
Commercial
AT&T Downtown
Delta Innovative Services, School Roofing Projects
Education
Liberty North High School
Delta Innovative Services, Government Roofing Projects
Government
Fort Leavenworth
Delta Innovative Services, Hospital Roofing Projects
Healthcare
Western Missouri Medical

Benefits of Built-Up Roofs

  • Built-up roofs are a rugged, long-lasting roofing system. Unlike single-ply systems (including TPO and EPDM), a built-up roof is not susceptible to punctures from foot traffic, cigarettes, dropped tools, falling debris, or animal activity.
  • Life expectancy of a built-up roof is twenty-plus years. A built-up roof is virtually maintenance-free.
  • Multiple waterproofing layers form into a monolithic sealed system which does not allow water under the roofing system.
  • Built-up roofs have a Class A fire rating.
  • If your building has a virtually flat roof that was originally designed for a BUR roof system, other roofing systems such as modified bitumen or single-ply will not be appropriate, since they require a slope to prevent ponding water. It is against building code to install these types of membranes on flat roofs without proper slope for drainage
  • Built-up roofs are designed to accommodate ponding water. While other roofing systems may initially be less expensive, they can become significantly more costly over the long term, since they will prematurely fail due to ponding water, which deteriorates the roof surface.
  • Multi-Layer Protection. The multiple layers of bitumen and bitumen-saturated felt make a water-resistant barrier capable of providing many years of reliable protection from the elements.
  • UV Protection. BUR roofing membranes can be protected from solar radiation by embedding gravel in the bitumen, applying a surface coating or applying a granular-surfaced cap sheet.
  • Thermal Performance. Built-up roofing systems exhibit exceptional resistance to the conduction of heat between the exterior and interior of a building, resulting in noticeable reductions in heating and cooling costs.
  • Fire and Uplift Resistance. Built-up roofing systems are tested to meet very strict fire resistance requirements, and to ensure adequate uplift resistance under extreme wind conditions.
  • Economy. Compared to other high-performance commercial roofing systems, built-up roofing is one of the best investments on the market due to its cost-per-year of expected service life.

Limitations of Built-Up Roofs

  • Installers must be highly-trained.
  • Asphalt vapors are emitted during installation.
  • Repairs should only completed by skilled technicians.

Benefits of Modified Bitumen

  • Modified bitumen membranes are the thickest of the single-ply class of roofing materials, making them more puncture resistant, more resistant to weathering and to the rate of aging.
  • Modified bitumen membranes are suitable for a broad range of service temperatures.

Limitations of Modified Bitumen

  • Special safety precautions are required to prevent fire during the installation process.
  • Modified bitumens are susceptible to certain chemicals, including compressor oil, mortar sealer and solvents.
  • Modified bitumen roofing is not effective for flat roofs without slopes. The roof must have a 1/4 inch per ft. slope to maintain proper drainage.

Modified Bitumen Roofs


 APP Modified

In order to create roofing grade asphalt, asphalt flux is air-blown at elevated temperatures, which converts the flux to roofing grade asphalt. In the early 1970's, manufacturers from Italy, lacking the blowing equipment, began looking for a product that would convert asphalt flux into a usable roofing product. They discovered that if Atactic Polypropylene (APP), a by-product of propylene polymerization, was added to asphalt, it provided the asphalt with some plastic properties. They determined that by adding about 30% of APP modifier, they could stretch the modified asphalt to 50% of its original length before it would break.

© 2016 Delta Innovative Services

To make APP into a usable roll product, some type of reinforcement was needed. The Italians looked into various reinforcement materials, and decided on a polyester mat, because polyester could accommodate the APP modified asphalt's elongation properties, where more commonly used woven fiberglass mats would not. The reinforcement material was dipped into the hot modified bitumen mix, and then went through a rolling cylinder, was cooled, and then was wound into a roll.

And Volker! A new roofing system was born.

APP membranes are applied using a torch. The back of the sheet has extra asphalt on it which, when heated, bonds to the substrate. This was especially convenient for the smaller, more cut up roofs because less room and equipment is needed on site to torch-apply a membrane than is necessary for application using hot bitumen.

 SBS Modified

While APP was being developed in southern Europe, northern Europe was experimenting with a different type of modifier called Styrene Butadiene Styrene (SBS). The French and Germans found that if they added 10%-15% of SBS rubber to asphalt, the asphalt's characteristics changed to those of the rubber additive. They learned that they could stretch the SBS modified asphalt up to six times its original length and that, unlike the APP, it would return to its original size when allowed to relax.

© 2016 Delta Innovative Services

Fantastic! Another new roofing system was born.

There are a wide range of reinforcements used in SBS roofing materials. These include fiberglass or polyester mats and scrims, or combinations of both. The fiberglass mats range in weight from 1.0 to 2.5 pounds per 100 square feet, or around 50 to 125 grams per square meter. Polyester reinforcements range in weight from 3.5 to 5.0 pounds per 100 square feet, or 170 to 250 grams per square meter. The type of reinforcement used depends on the materials ' performance requirements.

SBS membranes can be hot asphalt applied, torch applied, or cold process applied.

Benefits of TPO Roofs

  • Energy-efficient (when cleaned annually)
  • One of the most economical options for large, low-slope roofing areas without rooftop HVAC equipment to maintain (no foot traffic)

Limitations of TPO Roofs

  • Due to its single-ply nature, TPO is highly susceptible to foot traffic damage, resulting in tears, impacts, cigarette burns, and punctures.
  • Because TPO is fairly new roofing material (developed in the early 1990’s) many manufactures created their own unique formulations. This has lead to inconsistency in the performance of single-ply roofs, especially at the weld points.
  • Because of faulty chemical formulas, many TPO roofs have failed, and have been recalled. Problems have included seams coming apart, leak,s and membrane failures — especially when exposed to excessive heat over a prolonged period of time. The good news is that reputable manufacturers have taken care of these issues, and ASTM standards have established a base line of acceptable performance and features.
  • If you choose to install a TPO roofing membrane, you are getting a product that does not have a lengthy track record of flawless performance, but instead has a track record of revisions and improvements,
  • TPO roofing is not effective for flat roofs without slopes. Roofs must have a slope to maintain proper drainage.
  • This is not a do-it-yourself project. Professional installation is mandatory. You do not want to select a "new roofing contractor" or installer for welding your TPO roof.