s i n c e 1 9 1 0

Innovat ion & Consistency

No. 06.10 – February 2010 Roofing

Sika

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Roofing Solutions for Stadiums Eight Case Studies in USA

Roofing: Sarnafil®

Project DescriptionThe Carver-Hawkeye Arena at the University of Iowa’s Iowa City cam-pus seats 15,500 for basketball, and also is host to numerous concerts, sports camps, commencements and other events. It has been the site of many winning performances, including that of its roof. The 48 mil mechanically attached Sarnafil roof had done its job admirably for 25 years, until an unusually severe storm damaged parts of the roof in the spring of 2006. Yet, like a dedicated athlete who refuses to give up the game, the aging membrane continues to perform today in its new, recycled rendition as roofing walkway membranes. Meanwhile, its Sika Sarnafil replacement roof continues the legacy of being a high perform-ing player. The roof size is 158’000 square feet, and the roofing was completed in October 2006.

Project RequirementsThe arena’s original Sarnafil® roof was installed in 1981 and was still in a reasonable good shape till a very severe storm with hail and tornados in 2006. The roof refurbishment was then needed. The new membrane should be effectively welded to the old Sarnafil® mem-brane during the anticipated phasing of the roof installation.

Sika SolutionThe white Sarnafil® EnergySmart 60 mil S 327 mechani-cally attached system was selected to fulfill the requirements. One reason was that the new membrane could be effectively welded to the old Sarnafil membrane during the anticipated phasing of the roof installation. Another reason was that the roofing contractor, CEI Roofing Texas of Dallas, thought Sika Sarnafil’s bid was very well presented. In addition, prior to the start of construction, Sika Sarnafil technical sales representative Ken Baragary came up with a proposal for the old mem-brane to be recycled. Both the owner and the roofing contractor were enthusiastic about this idea.The installation crew began by removing the old membrane and re-placing the insulation around the outer edges of the roof. Most of the remaining insulation, however, was in very good shape and could be

Carver-Hawkeye Arena Iowa City, IA

reused. Dens-Deck® was mechanically fastened over the insulation and the Sarnafil® EnergySmart membrane was then installed.Both the new and old Sika Sarnafil roofs scored high points among those involved with the project. “My experience to-date with Sarnafil has definitely met or exceeded all expectations we had for them,” said Jeff Hayes, engineer at the University of Iowa.

Project ParticipantsOwner: University of IowaArchitect: Benchmark, Inc. Cedar Rapids, IARoofing Contractor: CEI Roofing Texas, LLC Dallas, TX

Project DescriptionThe Manley Field House at Syracuse University is the home of many men’s and women’s sporting events, intramural games and other spe-cial events. Topping all this action is a roof supplied by Sarnafil and in-stalled by Apple Roofing of Syracuse, New York. The roof size is 97’700 square feet, and the roofing was completed in September 2001.

Project RequirementsThe university had already gone through four roofs in the arena’s 40-year life. That’s because the dome flexes slightly during high wind, heavy snow loads and temperature changes, and the former roofing systems just couldn’t handle the thermal movement. Therefore a flex-ible roofing system that would move with the building was needed. Besides flexibility, aesthetics was an important consideration. A 77,700 square foot dome with a 19-foot wide brim crowns the Manley Field House. On top of the dome is a lantern, which is a circular roof about six feet off the arena dome with louvers around it for air fans. Almost 80,000 square feet of the roof can be seen from the ground at every possible angle.

Sika Solution“Sarnafil was the only system that met the criteria,” says architect Bruce King. “We weren’t able to find any equal performers.” Sarnafil® G 410 adhered membrane in custom light grey was chosen for its aesthet-ics as well as its ability to help reduce the thermal stresses on the dome. The workers began by tearing off the existing rubber roof-ing system, half inch fiberboard and two inch fiberglass insulation down to the deck. The new roof is composed of Sarnafil® G 410 membrane adhered to Dens-Deck® gypsum board over two layers of Sarnatherm® 1.5 inch polyisocyanurate insulation. Apple Roofing Contractor cut the membrane sheets in custom lengths for easier ap-plication on the arena as well as pre-cutting the 36 pie slice-shaped pieces needed for the dome.Possible severe snowdrifts presented a problem to the architect during

Manley Field House Syracuse University Syracuse, NY

the winter months. To address this issue with the new roof, Vermont Snow Guards developed and installed a snow retention system and painted it to match the light gray of the roofing membrane. To make winter maintenance even easier, an outside contractor installed a metal handrail up the slope of the dome.The final inspection result was perfect. The roof looks great. Everyone’s pleased with it.

Project ParticipantsOwner: Syracuse UniversityRoofing Contractor: Apple Roofing Corporation, Syracuse, NYArchitectural Firm: Holmes King Kallquist & Associates LLP

Project DescriptionThe new home of the Milwaukee Brewers baseball team, Miller Park, was a far cry from our usual roofing projects. The stadium’s 10.5-acre roof is a curved, retractable marvel that consists of seven elongated, pie-shaped wedges that arch high over the field. These pieces slide into nested stacks above and behind the first and third base lines when open, and fan out to meet in the center when closed. This huge piece of machinery, which contains 12’800 tons of structural steel, takes only 10 minutes to open or close.The roof size is 420’000 square feet, and the roofing was completed in spring 2001.

Project RequirementsThe owner has chosen Benjamin Moore colour for the roof and a white logo on it. The membrane shall have reliable quality and capability to roof the dif-ficult shape and the function of the unusual roof, and shall ensure the membrane to match tightly the required tolerance.

Sika SolutionMidland Engineering Company in South Bend, Indiana, became involved in the roofing project, they chose Sarnafil’s mechanically attached Sarnafil® 327 membrane, because they had roofed other stadiums successfully with Sarnafil.In this project the architect decided that a very high value Epic acous-tical deck was essential. To accomplish this, Midland Engineering anchored 5/8 Dens-Deck®, gypsum sheathing board with fiberglass mat facing, to the steel deck with screws and plates. Custom col-ored Sarnafil® S 327 membrane with white G 410 membrane used for the logo were mechanically attached on top of that by using Sarnafast®. All this was done while the seven pie slice-shaped piec-es of the roof were stacked on top of one another, held up by hydraulic jacks on shoring towers. So instead of installing the membrane from one end of the roof to the other, as in a conventional roofing project, the roofers had to jump back and forth, depending on which side of

Miller Park Milwaukee, WI

the panel was being constructed, installing temporary seals around the jack stands until they were removed. Part of the installation was done in winter with snow and ice on the roof.A 60 mil membrane was used on most of the roof and an 80 mil membrane was used in the large, built-in gutters at each end of the roof panels. Sarnafil® has an advantage over other products when working with these greater thicknesses. If a project requires an 80 mil sheet, Sarnafil® can run an 80 mil sheet right on the money; other companies may have to run a 90 or 95 mil sheet to ensure that their nominal tolerances don’t fall below 80 mil.

Project ParticipantsOwner: Southeast Wisconsin Professional Baseball Park District and the Milwaukee Brewers Baseball ClubArchitectural Firm: HKS, Inc. Dallas, TexasRoofing Contractor: Midland Engineering Company, South Bend, Indiana

Project DescriptionThe arena was built with three contiguous levels of luxury boxes (160 Suites), 13 Event Suites, and 2,500 premier seats. Nestled in the heart of downtown Los Angeles Business District, the Staples Center would not only revitalize the downtown area but also attract “Corporate America” to lease out the suites and upscale premier seating. The new Staples Center has the distinction of being the only arena in the U.S. that is home to three major sports franchises – the National Basketball Association’s Lakers and Clippers and the National Hockey League’s Kings. The Staples Center is also host to the 2000 Democratic National Convention.The roof size being waterproofed is 250’000 square feet.

Project RequirementsThe main challenges were: the roofing manufacturer should have his-tory and experience in providing roofing solutions to sporting venues; the roofing contractor shall have proven experience with the installation of single-ply roofing applications and could meet the challenges of an aggressive work schedule and completion date. This was no easy task considering the contractor would have to keep the building watertight through Southern California’s unusually heavy rainy season brought on by “El Nino”. The design of the center shows a dynamic character. The 10-degree slope of the exterior walls and the 5-degree slope of the roof were two of the methods used. The roof needs to appear to float above the structure, as well as walls that both curve and lean. The circular roof, which faces the downtown area, is one of the center’s most striking features. It drops 40 feet in elevation from south to north. The roof both serves as a signature skyline element and helps to reduce the scale of the building as it terminates above an outdoor plaza.

Sika SolutionAt that time, Sarnafil protected over 50 major arenas and stadiums (ap-proximately 10 million square feet) in North America alone, helped to convince the owner’s representative that Sarnafil and Anning – Johnson

Staples Center Arena Los Angeles, CA

(the contractors) were the right choice. Strong direct field techni-cal support by Sarnafil gave the additional assurance and was con-vincing. Specification for the new roofing system called for Sarnafil’s Mechanically Attached Sarnafast System using 60 mil membrane over Sarnatherm insulation on the upper bowl, 60 mil membrane over Dens-Deck on the lower roof, and 48 mil membrane over Sarnatherm insulation on the super truss. Sarnafil® G 410 custom matched “Staples Red” was used on the backdrop for the Staples Center logo. The Sarnafil Sarnafast Roof System was fast and easy to install. All seams are hot air welded. With the upper bowl having wide open ar-eas of roofing, the architect had designed tapered ribs to direct water equally to perimeter drains. Keeping in mind the aesthetics of the roof, Sarnafil and Anning – Johnson recommended the ribs be manufactured and fabricated out of Sarnafil’s clad metal. The use of clad metal would provide a cleaner finish to the detail and would also transition nicely into the field membrane.The lower roof areas would house all electrical and mechanical equip-ment for the arena. In its original design the membrane was to be installed directly over the polyisocyanurate insulation. It was very ap-parent that these roof areas would be exposed to much higher traffic which could potentially compress the insulation.The solution was to include a layer of 1/4” Dens-Deck®, increasing the compressive strength of the substrate below the Sarnafil membrane.

Project ParticipantsOwner: LA Arena CompanyArchitectural Firm: NBBJ Sports and Entertainment, Los Angeles, CARoofing Contractor: Anning – Johnson Company Industry, CAGeneral Contractor: PCL Construction Services, Inc. Los Angeles, CA

Project DescriptionIn the planning stages for the new Ice Palace, the owners of The Tampa Bay Lightning hockey team knew they would have to pull more than a hat trick to keep the NHL team’s new home tight and trim in the face of the area’s frequent tropical storms.With concert seating for 21,500, the Ice Palace was developed as a major sports and entertainment center. Its 1996 opening game drew over 20,000 fans. In addition to hosting over 40 regular season games there, the new arena had also been designed to attract large audiences all year long, for every kind of entertainment from the Tour of World Figure Skating Champions to rodeos and the Harlem Globetrotters.The roof size is 200’000 square feet, and the roofing was installed from April to December 1996.

Project RequirementsSituated right next to Tampa Bay, the Palace’s design featured a main barrel-shaped roof, sloped on two sides, as well as a lower flat roof. The main challenge for the roof is to hold its own over the years in the face of extreme temperatures, UV, winds, and rain. The arena’s own-ers had a precise wind study report completed to determine the best solution for the wind pressures on the roof and other aspects of the building. The roof needed a complete roofing system and a ensured long term performance.

Sika SolutionSarnafil’s Mechanically Attached Engineered Roofing System featuring Sarnafil® polyester reinforced roofing membrane was selected. The system utilizes the Sarnabar linear attachment method of mechanical fastening. A corrosion-resistant, roll formed 1”-wide, pre-punched, 14-gauge galvanized steel Sarnabar® is anchored to the structural roof deck using corrosion resistant fasteners. Providing wind protection far beyond that which is possible with traditional spot-affixed roofing sys-tems, Sarnabar® configuration is engineered to support high loads while delivering both the linear and torsional strength to resist twisting or deformation during high uplift forces.

Tampa Bay Ice Palace

A metal roof deck was installed on top of the arena’s building joists, us-ing standard 22 gauge steel for flat areas. For the barrel-shaped area, a 22 gauge steel acoustic decking with a unique rib configuration was used that presented its own challenge. The unusual deck configuration didn’t allow the roofing insulation to span properly across the deck’s flutes. Sarnafil’s technical staff suggested using 1/2” Dens-Deck® un-derlayment as a base layer. The Dens-Deck® addition helped provide the needed insulation support. For the insulation, the team installed Sarnatherm® polyisocyanurate insulation, a superior performance alternative to fiberboard or perlite insulation. For those areas where the arena deck was flat, tapered insulation was installed to assist in drain-age.Following the insulation installation, Sarnafil® S 327 a 48 mil polyester reinforced roofing membrane was applied, followed by Sarnabar® and coverstrips on the barrel area. The team used Sarnafast® Mechanically-Attached Engineered System on all flat areas with lower wind uplift conditions. Pinnacle Roofing applied the Sarnafil® 327 membrane to both the barrel and flat roof areas. White membrane was selected for most of the roofing area, with grey and white as a pattern for the barrel area. All seams were hot-air weld-ed for a watertight installation. In Sarnafil’s spread coating manufactur-ing process, Sarnafil® membranes become one homogeneous, rein-forced sheet. Combined with its reinforced, monolithic nature and high tensile strength, the Sarnafil® roofing membrane and the Sarnafil® Engineered System created for the Tampa Bay Lightning a roofing solu-tion that would be scoring for a long time to come.

Project ParticipantsOwner: Tampa Bay Lightning, NHL Hockey FranchiseArchitectural Firm: Ellebe Beckett, Kansas City, MORoofing Contractor: Pinnacle Roofing Contractors, Inc., Jacksonville, FLGeneral Contractor: Huber, Hunt & Nichols, Tampa, FL

Project DescriptionIn anticipation of the 2002 Winter Games, Salt Lake City is erecting buildings to host the various events. Olympic Ice Oval is for speed skat-ing events, with a base of concrete that expands and contracts with perfect uniformity. On every building, of course, is a roof – and that’s how Sarnafil became involved with the Olympics. The project size is 204’640 square feet.

Project RequirementsBecause the roof, which is constructed like a suspension bridge, can deflect up to 18 inches when the wind blows or when it’s covered with snow, metal and built up roofing systems were out of the question. Instead, a high quality single ply roofing system would be needed. There are also aesthetic and environmental requirements such as cus-tom colour, roof graphic, energy saving and so on.

Sika SolutionThe solution was to go with Sarnafil® S 327, a mechanically at-tached, polyester reinforced thermoplastic membrane, over two layers of Sarnatherm isocyanurate insulation totaling three inches. The EnergySmart Roof meets the Environmental Protection Agency’s ENERGY STAR® standard for roofing products and helped the Utah Olympic Oval become one of only 19 buildings worldwide with a LEED certification. Regarding roof graphic requirement, only Sarnafil could produce the membrane in custom colors to create the Salt Lake City and Olympic logos on the Ice Oval roof. During the installation, one challenge was to have waterproofed seal around the steel cable attached to the roof because the roof employs a suspension-bridge system. The Sarnafil roofing specialist and the ar-chitect designed a steel plate that attached to the I-beam on which the metal deck was placed, and that had attachments for the cables above the roof. A metal hood was then welded onto the plate about 18 inches above the roof deck, and Clark’s Quality Roofing installed a wood curb around the metal plate below the hood. The roofers were then able to wrap the Sarnafil membrane around the curb in a watertight fashion.

Utah Olympic Oval Kearns, UT

The installation went fast and well to meet the tight deadline.The end of the project brought more challenges. Usually, membrane terminations are anchored to plywood or masonry. But in the Olympic Oval project, the towers were made of plate steel, with no way to at-tach the terminations. The roofing contractors had to come up with a plan that wouldn’t void the 15-year warranty. Clark’s Quality Roofing ended up using Sarnafil’s Sarnaclad Metal product, a membrane-clad sheet metal, to form the flashings. “It’s an integral part of the roofing,” says Clark. “Years from now, you won’t have a delamination problem.”

Project ParticipantsOwner: Salt Lake Organizing CommitteeArchitect: Gillies Stransky Brems Smith, Salt Lake City, UTRoofing Contractor: Clark’s Quality Roofing, Salt Lake City, UT

Project DescriptionThe Delta Center, renamed as EnergySolutions Arena since November 20, 2006, was built in 1991. In 1999, the roof needed to be renovated. The roof size is 175’000 square feet, and the roofing was completed in November, 1999.

Project RequirementsA more wind resistant roof system was needed. Installation without interfering with scheduled events was imperative. Clark’s, the roofing contractor, needed to keep the existing tornado damaged roof in a wa-tertight condition while the replacement roof was being completed.

Sika SolutionFully Adhered Sika® Sarnafil® G 410, 48 mil was chosen as roof-ing solution for the renovation. Sarnafil roofing specialist supported Clark’s Quality Roofing in designing and installing a proven wind resistant roof that would comply with the stringent design specifications required by Factory Mutual Insurance Company.During the design phase Clark’s Quality Roofing performed major re-pairs to enable the continued use of the building. During the installation of the new roof, Clark’s was on call 24 hours a day, 7 days a week, to continue repairing the heavily damaged existing roof as needed

Delta Center Salt Lake City, Utah

throughout the entire project. As they were prohibited from working during events, Clark’s Quality Roofing worked many weekends and evenings to accommodate the schedule of the Delta Center and still meet the tight completion deadline. The project was completed in time and met the full satisfaction of the client.

Project ParticipantsOwner: Larry H Miller GroupGeneral Contractor: Sahara ConstructionRoofing Contractors: Clark’s Quality Roofing

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