Single-ply systems are made up of large sheets of various materials--elastomers such as EPDM, and various thermoplastics. As the name implies, only a single layer of this material is used to complete the roof. In general, these materials offer good elasticity and weather resistance.
There are several different techniques for attaching single-ply roofing systems to a roof. Many single-ply roofs are "ballasted," or anchored by a layer of stone or paver blocks. Others are mechanically attached to a substrate or deck using screws and reinforcement plates. A third option is the "fully adhered" single-ply roof which is completely glued to the roof substrate. Other single-ply roofs can be installed using a combination of methods.
Single-ply roofing systems are generally faster and easier to install than built-up systems. But because a single layer provides all the waterproofing and weather-resistance, installation techniques are more demanding and proper installation is critical.
Types of single-ply roofing
EPDM (Ethylene Propylene Diene Monomer) - better known as "rubber" roofing, EPDM membrane offers a host of advantages. EPDM is considered to be the longest lasting membrane roof system and can be installed in several ways; fully adhered, ballasted or mechanically attached. Overall EPDM roofing offers enhanced weatherability, durability and versatility but has greater difficulty withstanding oil and chemical attack.
Advantages:
1.Versatility- flexible roof applications
2.Ease of Installation- fast and easy to apply
3.Ease of maintenance & Repair
4.Durability- the longest lasting membrane
5.Superior Ultra-Violet Radiation Resistance
6.Strong warranties
TPO (Thermoplastic Olefins) single-ply roofing is heat-welded roofing system which offers the resilience of an EPDM membrane with extreme tear resistance. TPO can be applied as a ballasted, fully adhered, or mechanically fastened roof system.
Advantages:
1.Increased tear resistance
2.Better Chemical/oil grease resistance
3.Available in various colors
4.Reflects heat which can contribute to lower cooling costs
5.Strong seaming technology
6.Cold temperature applicable
Limitations:
1.Newer technology- not market proven. Less resilient to ultra-violet degradation
Architectural Metal Systems
Architectural metal roofing is making a comeback in residential, commercial and industrial roofing due to the availability of newer inexpensive metal material technology. A variety of options are available that mimic the look of Tile (Mediterranean tile) and shingle roofing. Metal roofing offers unparalleled water resistance and versatility and should be a strong consideration when deciding to re-roof.
Advantages:
1.Fire-retardant
2.Durable
3.Virtually maintenance free
4.Environmentally friendly, some are composed of recycled materials
5.Reflects and blocks heat transfer resulting in greater energy efficiency
6.Variety of color options
7.Algae/mold resistance
Limitations:
1.Premium pricing
2.Requires Professional installation/training
3.Rain noise transfer
4.Reliance on underlayment for water resistance
5.Possibility of denting
Built-up Roofing Systems
Considered the traditional flat roofing system, Built-up roofing systems consist of multiple layers of roofing felt or other reinforcing material, such as fiberglass and asphalt. The term "built up" refers to multiple layers of these reinforcing materials using asphalt to provide strength, durability, and weather resistance.
Advantages:
1.Built-up roofs offer incredible durability
2.They can easily be maintained by the owner or occupant's maintenance personnel after some training.
3.Repair materials are easily available and repair techniques are relatively straightforward.
4.Longevity of applications
Limitations:
1.Vulnerability to standing (ponding) water
2.Limited ability to expand and contract
3.Extremely labor & equipment intensive
4.Usually applied "Hot" using an open flame
5.Price- Expensive application
Modified Bitumen Systems
Modified bitumen roofing systems also use multiple layers of bitumen and reinforcing materials, but various materials, such as polymers, are added to the bitumen to alter some of its properties for greater stability and flexibility in a wide range of temperatures. Modified bitumen roofing systems are very versatile and can be used in most applications with adequate drainage. They are also easily repaired when required.
Slate
Slate roofing is actually a natural rock and in the United Slate is quarried in Pennsylvania, New York, Vermont, and Virginia. As with copper, slate roofing has been used for centuries as a roofing material and has stood the test of time because it is a nonabsorbent natural stone. Today's slate is available in various colors and have various standards associated with them. Although not a popular choice amongst today's roofing consumer, slate roofing is one of the most breath-taking and most durable roofs on the market. However, slate roofing shares the same limitations as copper and tile roofing.
Advantages:
1.Durability- Time tested roofing material
2.Appearance
3.Available in various colors
4.Non-porous
Limitations:
1.Cost
2.Skilled labor required
3.Labor intensive.
Copper
Copper roofing, although used for centuries, is not a widely used roofing material in today's roofing marketplace as a whole. Although majestic and beautiful, copper roofing has declined since the invention of inexpensive metal materials and membrane roofing products which require less complicated installation methods and which are not as labor intensive. Used for centuries in America's most beautiful churches and historic landmarks, copper still remains one of the most sought after roofing for those who can afford the vintage, grand look. From copper roofs to copper valleys and copper through-wall flashings and gutters, the skilled craftsmen we employ have the capability and know-how to make any project look as tasteful as its designer and owner.
Advantages:
1.Durability Time tested roofing material
2.Green roofing product
3.Naturally resistant to algae and mold formation
4.Appearance
5.Versatility- can be shaped and formed for many roof applications: including standing seam, flat seam, gutters, chimney through-wall flashings, valley materials, basic flashings, etc.
Limitations:
1.Cost
2.Skilled labor required
3.Labor intensive
Shingle Roofing
The most economical choice for most homeowners in today's fast paced world. Shingle roofing materials in the northeast are primarily composed of a reinforced fiberglass mat and asphalt but organic versions of asphalt shingles exist in our market. The look and durability of today's shingle products can mimic the look of slate and wood cedar shake roofs at a fraction of the cost. Available with warranties ranging from 25 years to Limited Lifetime series and with algae resistant features today's fiberglass asphalt shingles are guaranteed to stand up to the diverse New England weather conditions and protect your most valuable investments.
Advantages:
1.Costs- typically lower than any other form of steep slope roofing
2.Durability
3.Appearance- variety of colors and styles to choose from
4.Warranties
5.Strong wind ratings
Limitations:
1.Applications under a 3/12 roof pitch require certain precautions prior to installation.