Modified Bitumen Roofing Systems Simplified Approach to Commercial Low Slope Roofing

Transcription

1 Ron Blank & Associates, Inc Modified Bitumen Roofing Systems Simplified Approach to Commercial Low Slope Roofing Fernando Mesa Polyglass U.S.A., Inc. (203) Please note: you will need to take the quiz online at RonBlank.com to receive credit. PGI07D An AIA Continuing Education Program Credit for this course is 1 AIA HSW CE Hour

2 Approved Promotional Statement: Ron Blank & Associates, Inc. is a registered provider with The American Institute of Architects Continuing Education System. Credit earned upon completion of this program will be reported to CES Records for AIA members. Certificates of Completion are available for all course participants upon completion of the course conclusion quiz with +80%. Please view the following slide for more information on Certificates of Completion through RBA This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA or Ron Blank & Associates, Inc. of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

3 Course Format: This is a structured, web-based, self study course with a final exam. Course Credit: 1 AIA Health Safety & Welfare (HSW) CE Hour Completion Certificate: A confirmation is sent to you by and you can print one upon successful completion of a course or from your RonBlank.com transcript. If you have any difficulties printing or receiving your Certificate please send requests to certificate@ronblank.com Design professionals, please remember to print or save your certificate of completion after successfully completing a course conclusion quiz. confirmations will be sent to the address you have provided in your RonBlank.com account.

4 Course Description Modified bitumen roofing systems have come a long way since their inception. In this one hour course, you will learn about advanced technologies, various design considerations, and how modified bitumen roofing systems can help you achieve the desired aesthetic. You will also discover how current technologies provide for much safer installation practices on low slope roofs than in years past.

5 Learning Objectives Upon completion of the course, the design professional will be able to: Discuss the evolution of roofing including modified bitumen roofing technology Learn about the various asphalt and reinforcement options contained in modified bitumen membranes and how they contribute to the long life of a roof Describe proper installation techniques of modified bitumen roofing systems that contribute to safety and long life Discuss the potential challenges, design considerations and solutions of modified bitumen roofing systems

6 Components A roof is not simply the roof membrane, it is part of an assembly. The complete assembly, from the deck, up to the roof membrane, are all components of the roof system. The roof membrane is your first line of defense! That is what protects all of the components of the roof assembly and the building contents.

7 Construction Decks: Steel Concrete Lightweight Concrete Gypsum Cellular Free Flowing Vermiculite Wood Structural Wood Fiber Cement

8 Insulation Isocyanurate Expanded Polystyrene Extruded Polystyrene Fiberglass Rock Wool Perlite Wood Fiber Vegetable Fiber (Fiberboard)

9 Insulation Cellular Concrete Free Flowing Vermiculite Gypsum

10 Roof Membranes Asphalt BUR Type 1 Type II Type III Type IV SEBS SBS

11 Coal Tar Pitch BUR Type 1 Type III Coal Tar Bitumen Reinforcements Organic Fiberglass Surfacing: Gravel

12 Reinforcements Fiberglass Organic Polyester

13 Liquid Applied Membranes Acrylic Urethane Silicone SEBS SBS Asphalt Asphalt Cut-back

14 Polyurethane Foam Surfaces Acrylic Silicone Urethane

15 Single-ply EPDM TPO PVC PVC/Ketone Ethylene Ester CPE CSPE NBP Neoprene

16 Modified Bitumen APP Atactic Polypropylene SBS - Styrene Butadiene Styrene Reinforcements Fiberglass Polyester Various weights of each Surfaces Smooth Gravel Granule Reflective Films

17 Confusing? 56 different components named and likely to not be all inclusive. Literally over 3,000 different combinations, and this does not take into consideration how we put the systems together.

18 Basic design considerations: One of the most important initial considerations is drainage. How are we going to get the water off of the roof? Are we going to slope the deck and build drainage into the structure? Are we going to use tapered insulation and slope the roof to the drainage system? Which of these considerations is a permanent versus temporary solution?

19 Basic design considerations: Insulation? How much insulation do we need? What are the code requirements for the type of building and location? What is the purpose of the insulation? With steel decks, one of the primary purposes of insulation is to create a smooth surface that is dimensionally stable for the roof installation. R-Value is another purpose of insulation. Often higher R-value leads to less stable insulation. How many layers? Why use multiple layers?

20 Basic design considerations: How do we secure the insulation to the substrate? Adhesives: Asphalt - Foam - Glues Mechanically fasten: Number of fasteners needed, type of fastener necessary, is thermal bridging a consideration? What is the end use of the building? Humidity issues, coolers or freezers?

21 Basic design considerations: Roof usage? Why is this a consideration? Is the roof a platform that is an extension of the interior use of the building? The roof plane becomes the location where HVAC equipment, cooling towers, manufacturing equipment, exhausts from chimneys, bathrooms, kitchens. Antenna, cellular towers, and even Christmas Trees are placed. Swimming pools, tennis courts, patios, etc. What's a designer to do? Let's not forget solar panels. How many penetrations will be present? What service is required? How abuse resistant does the roof need to be?

22 Some roofs don t look like roofs

23 Accessibility and Equipment Considerations

24 Roof top equipment

25 Some details work others don t

26 Some designs work others don t

27 Do we need hail resistance?

28 Design considerations Why are there so many choices? There are so many different circumstances that must be dealt with, that no one roof system can fulfill all needs for every application. Minding the details 90% of all leaks occur at the perimeters and penetrations associated low slope roof systems. When we get those details right, the roof installation is likely to be a success. Too often we only see the roof when it is installed. Often what we find years later can be a shock to the designer.

29 Why do we like Modified Bitumen Systems? A: Multiple Application Techniques Multiple Application Techniques SBS Mop APP Cold Adhesives Torch Self-Adhered Torch Cold Adhesives Self-Adhered Cannot mop because the flux point of the APP polymer is above the flash point of asphalt

30 Why do we like Modified Bitumen Systems? Thicker membranes, the designer chooses the number of plies and the thickness of the assembly. Multiple ply assemblies offer redundancy and leak free installations Abrasion/Abuse resistance Puncture resistance Hail resistance Strong assemblies Reflectivity

31 Why do we like Modified Bitumen Systems? Modified Bitumen roofs do not fail catastrophically! Many of the products on the market will deteriorate at such a rate that the entire assembly will be lost often before the warranty expires. Due to the configuration and thickness of a modified bitumen system, problems are easily detected, repaired and restored before the entire roof is lost.

32 Conventional/Hybrid Modified Bitumen Installations Conventional Modified Bitumen installations require mopping hot asphalt, or cold process adhesives. Most SBS Modified Installations have been installed utilizing hot asphalt for the adhesive.

33 Torch Applied/Heat Welded Modified Bitumen Initially, all APP Modified Bitumen was heat welded and all SBS Modified Bitumen was adhered with hot asphalt. Today both APP and SBS may be installed using a torch.

34 Membrane Trends Self-Adhered Modified Bitumen Membranes were perfected in the late 1990s and continue to grow in popularity due to: Ease of installation No smell during installation No excessive noise during installation No open flames or kettles Simple tools Overall safer installation

35 Modified Bitumen Configurations Most low slope modified bitumen application are multiple ply installations Base sheets One or more layers functioning as redundant plies Cap Sheets Final wearing surface The basic definition of a low-slope roofing: Minimum slope of ¼ -foot to 2:12

36 Product Configurations Modified Bitumen Compounds SBS APP Reinforcement Fiberglass Polyester Surfacing Smooth (base sheets) Granule Film Self-adhered membranes come in exact thicknesses and have reinforcement and surfacing options

37 Self Adhered Membranes All Self-Adhesive Membranes have been altered by formulation from traditional membranes to provide tack and eventual adherence with similar performance to traditional application methods. The adhesion comes by adding tackifiers or membrane formulation. Both adhesion methods require heat from the sun and rolling to complete installation. Not a Peel-and-Stick.

38 Performance Modified Bitumen when properly formulated, meet building codes and testing requirements: Wind Uplift Fire FM assemblies Miami-Dade -315psf UL Class A Has high enough wind uplift and fire resistance to adapt to almost any project scenario

39 Performance Modified Bitumen Membranes are available with white coated granules or white films to provide high reflectance and high emissivity to comply with: Energy Star CRRC California Title 24 Reflectivity and Emissivity combine to have a cooler roof surface and hence a cooler building interior which allows HVAC systems to operate more efficiently

40 ASTM Standards D Dual Reinforced SBS D Glass Fiber Reinforced SBS D Polyester Reinforced SBS D Polyester Reinforced APP D Dual Reinforced APP D Metal Surfaced APP & SBS Types dictate mat strength Grades Smooth or Granulated Example: ASTM 6163, Type I, Grade G

41 Innovations Granule-Free Head Laps and Side Laps reduce the need for lap preparation Process through which granulated sheets are manufactured with granule-free selvedge and head lap. Lap areas may be protected by removable film to minimize granule embedment. You can re-use any portion of the cut membrane, but will need to prepare end/slide laps by removing granules. These labor saving features are for full rolls only. NO YES!

42 Installation Tips Relax your sheets! Especially on cool mornings. Maybe even flip over the membrane to allow the adhesive side to warm up.

43 Installation Tips Picture of Release film while placing membrane Pre-position roll for proper placement on the roof. On hot days, pre-positioning is very important. You may not get a second chance to re-align the sheet.

44 Installation Tips Picture of fast lap Remove film for granule-free head lap

45 Installation Tips Place a dog ear cut at all T-joints. T-joints require the most care during installation.

46 Installation Tips Final seam bond after rolling and heat. When complete, the membrane is very difficulty to separate.

47 Case Studies The following installations highlight the unique roofing solutions that can be achieved with modified bitumen membranes: Continued Building Operations Noise Fumes Roof-top traffic Access Aesthetics Complimenting adjacent steep-slopes

48 Hospital Low-Slope Roof A hospital re-roof may go quicker with a Single-Ply, but a Modified Bitumen Membrane gives you a superior performance with multiple plies, and little or no fumes during installation. Hospital Jackson, MS 2009

49 Commercial Low Slope Roof High Rise LaGorce Palace Condominiums Miami Beach, FL

50 Commercial Low Slope Roof - Office Chet Holifield Federal Building Laguna Nigel, CA

51 Commercial Low-Slope Hospital Batesville, MS 2012

52 Commercial Low-Slope MB Installation Low fume and low noise re-roof for 24/7 operations like a hospital. It is flexible enough to adapt to all of the roof penetrations too. St. Joseph Hospital Tampa, FL

53 Commercial Low-Slope Roof - Hotel Prestige Mountainside Resort Golden, BC

54 Commercial Low-Slope Roof Multi-Family Housing Low fume and nosie for a condo. Custom granule color for architectural needs. Seaside Landing Condominiums Sunset Beach, NC

55 Modified Bitumen Roofs Built-up roofs are manufactured using built-up layers of either tar-saturated paper and liquid tar with gravel, asphalt, rolled asphalt, or modified bitumen. As the roof is installed more and more layers are added to increase durability and longevity of the roof, hence the name built-up, modified bitumen, or hybrid systems Asphalt is the primary waterproofing within this category. Modified Bitumen is asphalt that is modified with special rubber compounds and/or plasticizers. Modified Bitumen roofs are considered to be premium systems. Since they require more labor to install, they typically cost slightly more than single-ply to install.

56 Modified Bitumen Roofs These roofs are either fully adhered, installed as a combination of fully adhered and mechanically fastened or mechanically fastened. Membranes are combinations of rolled roofing. Methods of application include: Hot Adhesives Cold Adhesives Self-Adhered Heat Welded/Torch Applied

57 Summary Modified Bitumen Systems have a unique and growing place in the roofing world. Modified Bitumen Systems have asphalt modifiers and reinforcement options found in traditional roofing membranes which lead to long-term performance. Proper design and installation techniques for all roofing systems have a huge effect on project success. Certain building types lend themselves to re-roofing with Modified Bitumen Systems.

58 Why use Modified Bitumen Modified Bitumen Roofing evolved from the most successful roofing and waterproofing products in history. Modified Bitumen Roofs have successfully proven themselves with over 50 years of historical evidence pertaining to their utilization in the United States, Europe and around the globe.

59 Why does Modified Bitumen Work? Multiple plies Redundancy Reduced workmanship errors Thicker Puncture Resistance Abrasion Resistance Strength High Performance

60 Why does Modified Bitumen Work? Asphalt waterproofing improved by adding rubber or plasticizers to enhance (modify). Two primary types of modifiers are used. APP Atactic Polypropylene SBS Styrene Butadiene Styrene Reinforcements, fiberglass or polyester coated with modified asphalt to improve performance. Multiple options including highly reflective.

61 Why does Modified Bitumen Work? Modified Bitumen systems have all of the advantages of built-up roofs while eliminating the limitations. Improved flexibility Improved strength Improved elongation Improved work to break Lower glass transition point Multiple application techniques Improved weather resistance

62 Conclusion Now, the design professional will be able to: Discuss the evolution of roofing including modified bitumen roofing technology Learn about the various asphalt and reinforcement options contained in modified bitumen membranes and how they contribute to the long life of a roof Describe proper installation techniques of modified bitumen roofing systems that contribute to safety and long life Discuss the potential challenges, design considerations and solutions of modified bitumen roofing systems

63 Ron Blank & Associates, Inc Modified Bitumen Roofing Systems Simplified Approach to Commercial Low Slope Roofing Fernando Mesa Polyglass U.S.A., Inc. (203) PGI07D An AIA Continuing Education Program Credit for this course is 1 AIA HSW CE Hour