Nash roofing has over 30 years experience in commercial bidding and contracts. Nash is certified in all of your major commercial roof applications; Metal, rubber, (F)TPO, and PVC to name just a few. EPDM (rubber roofing):Ethylene propylene diene monomer rubber (EPDM) is a synthetic rubber most commonly used in single-ply roofing because it is readily available and simple to apply. Seaming and detailing has evolved over the years and is fast, simple and reliable with many membranes including factory applied tape, resulting in a faster installation. The addition of these tapes has reduced labor by as much as 75%.It is a low-cost membrane, but when properly applied in appropriate places, its warranted life-span has reached 30 years and its expected lifespan has reached 50 years.
Class A Contractor
A Class C contractor can work on single contracts for $1,000 or more but less than $10,000 or contracts totaling less than $150,000 over a one-year period.A Class B contractor can work on single contracts for $10,000 or more but less than $120,000 or contracts totaling $150,000 or more but less than $500,000 over a one-year period.
There are no restrictions for a Class A contractor, must do more than $750,000 or more in contracts within a twelve month period.To obtain a Class A Contractor license, you must also be in business for 5 consecutive years, and also pass an exam. This helps you know who your contractor is and if they are experienced enough to do the job. Nash Roofing is a Class A Contractor.
We are able to do any kind of repairs, replacements, or new work that you may need. Some Class C Contractors won't tell you they aren't legally able to do your work and this could be a huge disaster in the hands of someone who isn't equipped or certified to do your roof, or other project. Always be aware of the class of your contractor.Contact
There are three installation methods: ballasted, mechanically attached, and fully adhered. Ballasted roofs are held in place by large round stones or slabs. Mechanically attached roof membranes are held in place with a plate-and-screw design and are suitable in some applications where wind velocities are not usually high. A drawback is that the screws penetrate the waterproof membrane; if correctly fastened the membrane is "self-gasketing" and will not leak. Fully adhered installation methods prove to give the longest performance of the three methods.
The most advanced EPDM has been combined with a polyester fleece backing and fabricated with a patented hot melt adhesive technology which provides consistent bond strength between the fleece backing and the membrane. This has resulted in largely eliminating shrinkage of the product, whilst still allowing it to stretch up to 300% and move with the building through the seasons. The fleece improves puncture and tear resistance considerably; 45-mil (1.1 mm) EPDM with a fleece backing is 180% stronger than 60-mil (1.5 mm) bare EPDM. Fleece backed EPDM has a tear strength of 39.9 kN/m (228 lbf/in) compared to 13.1 kN/m (75 lbf/in) of that without the fleece reinforcement, more than 3 times the strength of non-reinforced membranes.
Manufacturers for EPDM: Firestonebpco.com, MuleHide.com, Versico.com
Polyvinyl Chloride (PVC) membrane roofing is also known as vinyl roofing. Vinyl is derived from two simple ingredients: fossil fuel and salt. Petroleum or natural gas is processed to make ethylene, and salt is subjected to electrolysis to separate out the natural element chlorine. Ethylene and chlorine are combined to produce ethylene dichloride (EDC), which is further processed into a gas called vinyl chloride monomer (VCM). In the next step, known as polymerization, the VCM molecule forms chains, converting the gas into a fine, white powder – vinyl resin – which becomes the basis for the final process, compounding. In compounding, vinyl resin may be blended with additives such as stabilizers for durability, plasticizers for flexibility and pigments for color.
Thermoplastic is heat-welded seams form a permanent, watertight bond that is stronger than the membrane itself. PVC resin is modified with plasticizers and UV stabilizers, and reinforced with fiberglass non-woven mats or polyester woven scrims, for use as a flexible roofing membrane. PVC is, however, subject to plasticizer migration. (a process by which the plasticizers migrate out of the sheet causing it to become brittle.) Thus, a thicker membrane has a larger reservoir of plasticizer to maintain flexibility over its lifespan. PVC is often blended with other polymers to add to the performance capabilities of the original PVC formulation, such as KEE – Keytone Ethylene Ester. Such blends are referred to as either a CPA – Copolymer Alloy or a TPA – Tripolymer Alloy.
Vinyl roofs provide an energy-efficient roofing option due to their inherently light coloring. While the surface of a black roof can experience a temperature increase of as much as 90 degrees under the heat of the full sun, a white reflective roof typically increases only 5–14 degrees Celsius (10–25 degrees Fahrenheit). That is why PVC is one of the common materials used for green, or planted, roofs.
Manufacturer for PVC: Duro-last.com
Thermoplastic Polyolefin single-ply roofing. This roofing material can be fully adhered, mechanically fastened, or ballasted. TPO seam strengths are reported to be three to four times higher than EPDM roofing systems. This is a popular choice for "Green" building as there are no plasticizers added and TPO does not degrade under UV radiation. It is available in white, grey, and black. Using white roof material helps reduce the "heat island effect" and solar heat gain in the building.
Manufacturers for EPDM: Firestonebpco.com, MuleHide.com, Versico.com
Standing Seam Metal Roof:
Continuous panels run from the ridge of the roof all the way down to the eaves. Between the panels are seams connected by fasteners which are raised above the level of the metal roofing. This is where we get the term standing seam, because the seam is raised or standing, as opposed to flush-mounted.
- Seam Fasteners: These seam fasteners might be anywhere from 0.5" to 1.5" high. Because these fasteners are concealed, you only see a smooth continuous ridge extending from top to bottom.
- Pre-Formed vs. Site-Formed: Roof panels can come either pre-formed or site-formed. Pre-formed panels are created in an off-site factory. Site-formed panels are created from rolls of metal that are run through mobile forming machines which crimp the metal into rigid panels. Composition and Width of Panels: 12 to 19 inches wide, panels are usually made either of Galvalume-coated steel or aluminum.
- High Seams: One great advantage of standing seam metal roofs is contained in the name itself: seams, the weak point in any roof and a potential entry point for moisture, are raised above the level of the roofing panel.
- Fewer Seams: Because the metal panels run unhindered from the top to the bottom of the roof, not only are there no horizontal seams but in total the roof has a far fewer number of seams.
- Tough: Yes, metal is tough--very tough--but it's not impervious to all hazards. The sheet metal in this type of roofing can be penetrated by heavy falling limbs or dented by a severe hailstorm.
- "Cool Roof": All metal roofing in general is considered a "cool roof" by the US Environmental Protection Agency. This is because metal roofing can be painted any color, including colors on the lighter end of the spectrum which will prevent solar heat gain.
- Sleek Looks: Standing seam roofs are perfect for certain types of contemporary or country-style houses. Due to the smooth, straight lines, these roofs give your house an "industrial" feeling, yet with a modern flair. These are not the rippled tin roofs that you might remember from warehouses of the past.
- Colors: I mentioned this earlier, but only in terms of lighter, sun-reflecting colors. But what about style?
- Metal comes in a decent array of colors: grays, browns, forest greens, earthy reds, blues, metal (bronze, faux copper, patina). Perhaps this isn't the full palette of colors as you might find at a paint store, but it's more than you'll find with composite/asphalt shingles. All metal panels are made on-site, custom to the roof. No ordering panels and finding that they aren't the right dimension for the roof. All flashing, drip edge, fascia wrap, etc. made in house.
Metal manufacturers: Englertinc.com, Berridge.com, Atas.com, Firestonemetal.com