Annual Roofing Report
The 30-story Park Place luxury condominium and townhome development in San Diego features a steep-sloped tile roof that covers the upper tower portion of the building where mechanical equipment and service rooms are housed. The metal tile panel system is made of 26-gauge Zincalume steel panels weighing only 1.25 pounds per sq. ft., a fraction of the originally specified Spanish tile, and was installed in one-fourth of the time expected.
Reader Service No. 213
Roof insulation is designed using thermally efficient polyiso-insulation with vent strips of 1 in., 1.5 in., or 2 in., separating 7/16-in. APA/TECO-rated OSB from polyiso-rigid insulation creates cross-ventilation over sloped-unventilated roof decks, allowing for maximum heat dissipation, according to its manufacturer.
Atlas Roofing Products.
Reader Service No. 215
Roofing membrane offers a 30-year warranty protecting against incidental punctures, 100- mph winds, and hail up to 2 in. in diameter, with no dollar limit. The RubberGard Platinum Roofing System is made of a durable, 90-mil. thick EPDM membrane fully adhered to HailGard composite insulation and seamed with QuickSeam Tape System. The system features 90 mils of uninterrupted, weatherable thickness without requiring internal reinforcements, backings, or coverings, says its maker.
Reader Service No. 216
St. Gabriel's Chapel in Audubon, Pa., is over 100 years old, and still contains many of its original roof tiles. As part of the re-roofing of the entire tile system, 525 squares of Woodscape (40-year) shingles were installed after repairing substrate and reinstalling new tile. The crew also built the ecclesiastical ornamentation at the chapel, a job that required the erection of pipe scaffolding to the clock tower at an elevation of nearly 160 ft.
Reader Service No. 210
Architectural copings and snap-on gravel stops for roof trims feature concealed spring-loaded compression cleats that allow the installer to easily snap the coping into position in a vertical fashion, eliminating exposed fasteners. The Press-Loc Coping has a heavy-gauge design that allows parapet walls to vary in width up to 1 1/2 in. without sacrificing quality or performance, says the manufacturer. The hardware works with any type of roof system, EPDM, thermoplastic, modified, or built-up.
Reader Service No. 222
The Millville Firehouse in Millville, N. J., experienced perpetual leaking problems with the station's existing flat BUR roof. City engineers opted to replace the existing roof with a framing system and a sloped A-shaped covering. The R-Mer Span standing seam metal roofing system, including structural and architectural panels, was installed. Wooden roofs over other entryways were replaced with R-Mer metal canopies to match the roof.
The Garland Co.
Reader Service No. 205
Kicked to the Curb
Roof curb has integral 1- to 3-ft. deflection isolation and an external spring access for easy field adjustment. Options include seismic calculations for all zones, wood nailers, duct supports to match all manufacturers' equipment, sound attenuation packages, increased heights, and pitched configurations for conventional and pre-engineered metal building roofs. The roof curb has a maximum wind load of 120 mph.
Roof Products Inc.
Reader Service No. 221
Eight-page metal roof restoration brochure helps owners identify signs of deterioration and imminent leaking on old metal roofs. Describes how specific technologies can provide long-lasting, energy-efficient, and cost-effective solutions.
Reader Service No. 219
Church now dry, cool
The 14,000-sq-ft. church roof belonging to the Paroisse St. Louis de Gonzague in Richibouctou, New Brunswick, Canada, was leaking and in need of rehabilitation. With extreme high winds, snow, and rain in the city's climate, the existing concrete roof deck with multiple domes and valleys needed year-round protection. A seamless, direct-bond, fluid-applied roof system was customized to protect the building's cover. Using a seamless urethane coating, the roof surface was primed to ensure proper adhesion and maximum performance to weatherproofing topcoats before the elastomeric quickset acrylic roof coating was applied. The white, reflective system also was designed to reduce cooling costs.
Reader Service No. 206
Clad with 800,000 sq. ft. of Hypalon chlorosulfonated polyethylene roofing, the Smithsonian National Air and Space Museum's Steven F. Udvar-Hazy Center at Washington's Dulles International Airport will open in December. Resembling a large aviation hanger, the center's barrel-vault design rises 10 stories tall and runs the length of 2 1/2 football fields. It contains an archival resource center, a large-format theater, and restaurants and museum shops. The Hypalon roofing material is a scrim-reinforced, heat-weldable, single-ply membrane that can be produced in a light grey color, as in this case, designed to not be too harsh on pilot's eyes. After it is installed and exposed to natural elements, Hypalon cures into a cross-linked rubber, giving it strength and durability. It also resists chemicals, including jet fuel, says the maker.
Reader Service No. 204
Re-roof no more
Polymer-modified compound is an alternative to re-roofing buildings affected by ponded water or exposure to environmental conditions. ArmorFlex can be applied to built-up or modified bitumen membrane systems to prolong their life by resisting ponded water, chemical attack, and other forces of nature. According to the manufacturer, ArmorFlex systems can run as much as 60% less than the cost of a re-roof operation, the maker says.
Reader Service No. 211
Stainless-steel roofing tile system is made from 75% recycled type 304 stainless and is 100% recyclable. The permanently colored metal roofing draws its colors from within the stainless steel itself, enhancing the protective chrome oxide layer on the surface of the tile, creating hues that change under different lighting and viewing conditions.
Reader Service No. 218
Custom-curved acoustical metal panels act as a roof deck and an acoustical ceiling at the same time, using a crimp-curving method for domes, arches, and multiple-radius curves and "S" shapes. Both "B" and "N" panels can be curved in 22 to 18 gauge. Applications include gymnasiums and sports arenas, retail stores, malls, and airports.
Reader Service No. 217
The right formula
The roof on the 14,000-sq.-ft. University of Nevada chemistry lab had been installed in the 1970s, had 2 ft. thick of pigeon droppings, and had deteriorated so badly that in some spots the reinforcing was exposed. The roof was replaced with UltraGard SR60 PVC roofing system and was installed over Tapered ISO 1 roof insulation. Challenges for the project included the fact that 80% of the roof was covered with mechanical equipment, which had to be kept operational while classes were in session during construction.
Reader Service No. 209
The contemporary look of the City of Ava Water Park in Ava, Mo., was achieved with the Snap-It Architectural Roof System. The standing-seam metal roof of the 2,900-sq.-ft. main building was developed as an interlocking panel system utilizing a 22-gauge metal or 5/8-in. wood deck as substrate support. The system consists of fluted or non-fluted 16-in. wide panels as the standard offering, with optional 12-in.- or 20-in.-wide panels and provides design flexibility for complex roof configurations.
Butler Manufacturing Co.
Reader Service No. 208
The $140 million Illinois Maximum Security Correctional Center in Thomson, Ill., includes more than 600,000 sq. ft. of building space to house 1,600 maximum-security inmates. The facility required 395,000 sq. ft. of Snap-Clad 24-gauge galvalume panels with a custom color, Prison Grey finish. In addition, 20,000 linear feet of 20-gauge Pac-Loc coping and 5,000 sq. ft. of Snap-On panels were installed. Project architect Daniel, Mann, Johnson & Mendenhall designed the building to include eight cell houses with four wings each. Because of the size of the job, the panels had to be supplied weekly for each building area, which required a great deal of coordination. The panels were produced in custom lengths of up to 64 ft. and shipped to the site. The Snap-Clad Panels are available in 33 colors on steel and 27 standard colors on aluminum.
Reader Service No. 203
'Hotlanta,' cool roofs
Atlanta's Georgia Institute of Technology tried different roofing systems on a variety of campus buildings, only to find a few years later that the South's heat weakened seams requiring another re-roofing. In the last five years, Georgia Tech has installed 30 white Cool Zone roofing systems over existing roofs. According to Jim Hummel, construction project manager for the school, the Cool Zone system was chosen because of its long-term warranty, lack of fumes, high solar reflectivity, and easy installation over most old roofing substrates, eliminating the need for costly tear-offs and disposal. Cool Zone is pre-fabricated so that all materials arrive pre-measured to fit the exact dimensions of the roof application.
Reader Service No. 212
Chicago City Hall's 100-year-old flat roof was used to test the benefits of using a vegetated roof system in an urban environment. With lightweight soil mixtures and a variety of plants, the roof showed a surface temperature reduction of 70 degrees and an air temperature reduction of 15 degrees. Between the building's flat roof and the vegetation is a G476 thermoplastic waterproofing membrane, specially designed to remain watertight in extreme sub-grade environments. The membrane has passed stringent European test standards for root resistance.
Reader Service No. 202
Fancy-cut fish scales
The 7,200-sq.-ft., four-story historic Coronado Boat House in Coronado, Calif., was originally constructed in 1887. In an effort to refurbish the house, while still maintaining the historic character of the building, the building's new roof had to resemble the original construction. A lightweight, cementitious red roofing product, simulating cedar wood shingles, was used on the 12 large dormer roofs, while fancy-cut shingles in a fish scale pattern were used on the upper cupola. An effort was also made to conceal and reduce the number of vents in the roof to enhance the aesthetic appeal of the structure.
Reader Service No. 220
Stick to the top
Professional roof insulation adhesive features an increased shelf life and reduced bottom temperature range to just above freezing. Insta-Stick, according to its maker, now stays "foamier" for a longer period of time, allowing it to bridge the gaps that often are found between the roof deck and the insulation board. The adhesive dispenses more rapidly, increasing application speed and labor savings. Insta-Stick is dispensed from a portable, disposable, pre-pressurized container requiring no external power source. It is used in place of asphalt or mechanical fasteners for attaching insulation boards to roof decks or to one another in multilayer systems. The adhesive can be used on wood, concrete, or steel decks, 22 gauge and higher.
Dow Chemical Co.
Reader Service No. 214
The indoor pool at Daytona Beach Community College, in Daytona Beach, Fla., was only five years old and yet the roof was already deteriorating badly from chlorine vapors hitting the metal roof. Approximately 12,500 sq. ft. of CFR-42 polyurethane foam insulation composite in polar white was installed on the building's interior, with the same amount of G-90 galvanized steel on the exterior. Installation was complete in only 40 days, without having to drain the pool.
Reader Service No. 207