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Greenbuild 2013
- 1. ®
- 2. ® ® Get to Know Us Again ® ® NEW NAMES. SAME GREAT PRODUCTS.
- 3. ® Our Commitment to Our Environment
- 5. LEED ® NC Points CONFORM® formwork can contribute to the these LEED® Credits
- 6. ® ®
- 7. ® What is CONFORM? Patented Concrete Forming Technology Components interconnect together to create a finished concrete wall CONFORM is cost competitive with quality CMU construction
- 8. Concrete Service Channel Insulation Polymer Shell Reinforcing Bar CF8i (200mm-8” Wall-Insulated)
- 9. ® Wall Types CF4 100 mm 4” wall CF6 CF8 150 mm 6” wall 200 mm 8” wall CF8i 200 mm 8” insulated wall
- 10. ® CONFORM is the ONLY solution that is: Corrosion Resistant Durable Easy to Clean Requires Minimal Maintenance Constructs Quickly
- 11. Constructs Quickly Every Building is custom made in our factory All components are pre-cut and labeled for easy on site assembly Less skilled labor required on site Cleaner overall work site
- 12. Types of Concrete Wall Panels Solid Concrete Wall Panels = Question: Did you know that 7” of load- bearing structural concrete has approximately the same R-Value as a single panel of glass…R-1.4 ! Insulation IS Important !
- 13. Types of Concrete Wall Panels Insulating Options? Insulation Position is critical: Interior: Insulation separates you from the mass effect Exterior: Outside of the bulk mass of the wall system. CF8i 200 mm 8” insulated wall
- 14. Effective R-Value Thermal Efficiency in a Wall Panel The ability of concrete to store energy and dampen the effect of temperature change on heating and cooling systems is know as the “Thermal Mass Effect.” Due to the mass effect of insulated precast walls, the performance R-value of the high performance wall system can be two to three times greater than that of the material R-value, resulting in energy cost savings up to or exceeding 50%. High Mass Building Conventional Insulated Building
- 15. ASHRAE 90.1-1989 Building Envelope Performance Study ASHRAE 90.1-1989 Performance Analysis APPROVED Calculations will show how what R-Value a Integrally Insulated High Mass Wall Panel will perform at. e --11 RValue of R1 terialR--Valu of R!! 1 Ma Material as R-25 performsas R-25!! rms perfo
- 16. Composite Sandwich Wall Panels Thermally Inefficient Connection Devices Thermographic image showing thermal bridging.
- 17. Conform Energy Efficient Wall Panels ® Thermally Efficient Thermo graphic image shows thermal efficiency: Edge to Edge Insulation
- 18. Insulated Concrete Sandwich Walls Moisture Management The problems associated with moisture and its affects on building components are well known, and costly to repair. Most Insurers have stopped coverage for these incidents leaving owners no other avenue for compensation but the court system. Bottom Line: No Moisture Means No Mold or Mildew
- 19. Insulated Concrete Sandwich Walls Moisture Management In general, molds demand a favorable combination of the following conditions to germinate, sporulate, and grow: Fungal spores settling on the surface Oxygen availability Optimal temperatures between 40-70 degrees F Nutrient availability (wood, paper, cellulose based materials) Moisture (liquid or relative humidity above 70%) The first four conditions are met in almost every building. The key remaining factor is moisture, which may be controlled by adhering to sound construction practices discussed in this presentation. Bottom Line: No Moisture Means No Mold or Mildew
- 20. Insulated Concrete Sandwich Walls Moisture Vapor Drive Warm Outside Cold Inside In a Hot/Mixed Climate: Diffusion from the exterior side of the wall is also common. In spring, summer, and fall, wind driven rain can be absorbed in the exterior concrete and stored. Outside-In Vapor Drive Insulation is critical in preventing this moisture vapor drive: Concrete can’t Exterior Paints can’t After the rain, as the sun heats up the concrete wythe, the moisture turns to vapor and is driven through the wall Moisture will always diffuse, especially if the perm rating is greater than 1.0
- 21. Moisture Vapor Drive Insulation will enhance the efficiency of the entire wall system. Cold Inside Air PVC Encompassed Insulation and Concrete form Outside-In Vapor Drive Exfiltration
- 22. Insulated Concrete Sandwich Walls Moisture Vapor Drive What Is Vapor Diffusion? The Process by which water vapor migrates through a wall system and it’s components such as gypsum, concrete, insulation and paint. Each components of the wall system has a perm rating The International Building Code says that a material with a perm rating of 1.0 or less is a vapor retarder. Examples of the average perm rating for different wall components… Gypsum 12 - 50 perms Plastic Sheet Barriers (2-10 mil) .16 – .03 perms Rigid Insulation 5.8 – .03 perms Concrete 3.2 perms PVC 0 perms
- 23. Energy Efficiency 36% of ALL energy consumed in the U.S. is consumed by buildings Natural gas prices are expected to increase from 30% to 70% compared to one year ago “Energy efficient building shell is one that integrates and optimizes insulation levels, glazing, shading, thermal mass, air leakage control, and light-colored exterior surfaces” (Sustainable Building Industry Council - High Performance School Buildings 2005 Second Edition)
- 24. Effective R-Value Thermal Loss Through Wall Panel ASHRAE 90.1 recognizes thermal short circuits and applies a correction factor to account for the higher heat loss through highly conductive steel studs. Effective R-value = R-value x Correction Factor
- 25. Effective R-Value What R-Value are you Purchasing? Let’s look at the assembly of the Steel Stud / Brick Wall: 6” 20 GA S.S. @ 24” o.c., R-19 Batt + ½” Gyp. Component Int air film Gypsum Vapor retarder R19 batt Gypsum Air space Brick Ext.air film Wall Effective R-Value: R-value 0.68 0.45 0.01 8.60 0.45 0.60 0.80 0.17 11.76 INTERIOR AIR FILM GYPSUM BOARD STEEL STUD R-19 BATT INSULATION EXTERIOR GYPSUM AIR SPACE MASONRY EXTERIOR AIR FILM The ASHRAE “PARALLEL PATH METHOD” was used to calculate the effective thermal performance for the metal frame wall construction. The correction factors from ASHRAE Standard 90.1, 1989 User’s Manual were used to assign reduced thermal resistance values for the insulated stud cavity.
- 36. ® Condominium ®
- 37. ® Sports Complex Built - 1999
- 38. ® Ocean Point Villas-Grand Cayman Islands Survives Hurricane Michelle (2001) with Sustained Wind Speeds of 143 mph
- 40. ® Mid-Rise Residential-Turks & Caicos
- 41. ® St. Peters School-St. Peters Saint Maarten-Built 1998
- 42. ® Airport Control Tower Saint Maarten-Built 2003
- 43. ® RESIDENTIAL
- 45. ® Ocean View Terrace Custom Residence Built 2007
- 48. ® For additional information visit our website www.nuformdirect.com or contact us toll free 1.877.747.WALL(9255) NUFORM, CONFORM, RELINE, RENU and the N logo are Registered trademarks of Nuform Building Technologies Inc.
Notas do Editor
- Did you know that that solid piece of concrete, while it has a great heat capacity, or ability to store heat or cooling loads, has very little insulating ability. In actuality, a 7” thick piece of concrete has the same R-value as a single pane of glass, or R-1.4. However, if you insulate the mass of concrete effectively, preventing the heating or cooling loads from escaping the mass, the wall can have a tremendous R-Value.
- This behavior is demonstrated in the 2003 IECC. The International Code has established terms for the location of insulation. They call out: Interior: Which is insulation on the inside of the bulk of mass. This is shown in the photo to the left where insulation is installed on the interior side of the tilt-up wall panel Exterior: Which is where the insulation is installed to the exterior of the mass of concrete. This is demonstrated in the center image, and would be an EIFS type application. This defeats the benefit of having the durability and architectural features of precast concrete. Integral: Integral is a panel where the insulation is sandwiched between two substantial amounts of mass.
- A Performance Study. What is that? Well, earlier when we talked about the benefit the code gives us for using a high mass wall with integral insluation, it was because we take advantage of the Thermal Mass of Concrete. This is the behavior of the interior layer of concrete acting as a heat sink and slowly releasing energy as opposed to the peaks and valleys present in a more traditional building envelope (Steel stud, wood frame, etc).
- The second step is a Envelope Performance Study, also dictated by ASHRAE 90.1. This particular study gives you the R-Value as a result of effectively utilizing the Thermal Mass of Concrete. It is dependent upon the location, occupancy type, wall panel area, and configuration. For this particular project, again a school in Atlanta, GA, the 4/2/4 Thermomass panel has an Effective R-Value of R-25.07. This is the R-Value the mechanical engineer should take into account when sizing his components. Historically, this has resulted in a Tonnage reduction of up to 37%.
- There is no question that Mold and Mildew is a significant concern. Whether it be insurance rates going up or health concerns, the issue is costly and serious.
- The reason this is a problem is because buildings are being constructed more tightly than ever before and are full of ingredients to spawn mold growth. Overall, there are 5 things requrired for mold to grow. Spores settling on the surface Oxygen Right Temperature (Ambient) Food Source (cellulose) Water Water is the one that is controllable because the first four are present in almost any building. THE MAIN THING TO GET ACROSS HERE IS WE HAVE TAKEN OUT THE CELLULOSE IN THE WALL ASSEMBLY AND, OTHER THAN A PIPE BREAKING, ARE DESIGNING THE WALL TO PREVENT WATER VAPOR FROM DIFFUSING AND GETTING THE WALL WET.
- In general sandwich panels, or any wall assembly for that matter is subjected to a significant difference in interior/exterior temperature and humidity. In this example, and one that we can all appreciate, on a hot day it will get warm outside and the air will be wet. When it is colder and dryer inside, there will be a significant outside-in vapor drive. The individual materials are responsible for controlling the vapor drive. Overall, insulation is critical to stopping that drive. Concrete cant stop it and paints cant either.
- MAIN POINT: EDGE TO EDGE INSLUATION IS CRITICAL AND THERMOMASS IS THE ONLY SYSTEM TO GIVE YOU NON-CONDUCTIVE CONNECTORS AND A CONTINUOS LAYER OF VAPOR RETARDING INSUALTION.
- According to the International Building Code, a material must have a perm rating of 1.0 or less. We touched on this when discussing the foams earlier. XPS has a perm rating of 0.55, ISO has a perm rating of 0.03. EPS has a perm rating of 3. In comparison, gypsum, concrete, and plastic sheets span the spectrum of perm ratings.
- I like to show this slide, as Im sure many of the architects in the audience are familiar with it. The steel studs represent thermal short circuits in the wall assembly. As a result of the thermal short circuits, the fiber-glass insulation’s R-Value is not achieved. The same theory is in play for Concrete Wall Assemblies. If the insulation layer is interrupted, the material R-Value will not be achieved, but additionally, there will be condensation issues as the vapor retarder or barrier is broken.