ARMY UFGS-07 08 27 00 10-2013 BUILDING AIR BARRIER SYSTEM TESTING FOR COMMISSIONING.pdf

1、*USACE / NAVFAC / AFCESA / NASA UFGS-07 08 27.00 10 (February 2013)-SupersedingPreparing Activity: USACE UFGS-07 27 00.45 10 (May 2012)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated January 2013*SECTION TABLE OF CONTENTSDIVISION 07 - THERMAL AND MOISTURE PROTECTIO

2、NSECTION 07 08 27.00 10BUILDING AIR BARRIER SYSTEM TESTING FOR COMMISSIONING02/13PART 1 GENERAL1.1 SUMMARY1.2 REFERENCES1.3 DEFINITIONS1.3.1 Air Barrier Accessory1.3.2 Air Barrier Assembly1.3.3 Air Barrier Component1.3.4 Air Barrier Material1.3.5 Air Barrier System1.3.6 Air Leakage Rate1.3.7 Air Per

3、meance1.3.8 Environmental Separator1.3.9 Test Zone1.4 PRECONSTRUCTION CONFERENCE1.5 SUBMITTALS1.6 AIR BARRIER SYSTEM SURFACE AREA AND FUNCTIONAL REQUIREMENTS1.7 QUALITY CONTROL1.7.1 Qualifications1.7.1.1 Air Barrier Inspector1.7.1.2 Thermography Test Firm1.7.1.3 Thermography Test Technician1.7.1.4 A

4、ir Barrier Leakage Test Firm1.7.1.5 Air Barrier Leakage Test Technician1.7.2 Design ReviewPART 2 PRODUCTSPART 3 EXECUTION3.1 QUALITY CONTROL3.1.1 Documentation and Reporting3.1.2 Construction Mock-Up3.1.3 Quality Control Testing3.2 THERMOGRAPHY TESTSECTION 07 08 27.00 10 Page 1Provided by IHSNot for

5、 ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.1 Field Conditions3.2.2 Thermography Test Procedures3.2.3 Thermographic Test Report3.3 AIR BARRIER LEAKAGE TEST3.3.1 Building Air Barrier Leakage Test Procedures3.3.2 Fan Pressurization Test3.3.3 Air Barrier Leakage Test

6、 Report3.4 AIR BARRIER FUNCTIONAL REQUIREMENTS FAILURE3.5 REPAIR AND PROTECTION- End of Section Table of Contents -SECTION 07 08 27.00 10 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-07 08 27.00 10 (Febru

7、ary 2013)-SupersedingPreparing Activity: USACE UFGS-07 27 00.45 10 (May 2012)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated January 2013*SECTION 07 08 27.00 10BUILDING AIR BARRIER SYSTEM TESTING FOR COMMISSIONING02/13*NOTE: This guide specification covers contract

8、or responsibilities, quality control, and functional requirements of the constructed air barrier system; it also covers the thermography and building air barrier leakage testing to verify that the building air barrier system and envelope are constructed properly. This guide specification is to be us

9、ed in the preparation of project specifications in accordance with ER 1110-345-700.Adhere to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections. Edit this guide specification for project sp

10、ecific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requirements not required in respective project, whether or not brackets are present.Comments, suggestions and recommended changes for t

11、his guide specification are welcome and should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: This specification is applicable to new building construction and major renovations involving upgrade to the building envelope; it is not applicable to unconditioned buildings. This s

12、pecification is intended to define Contractor responsibilities for the construction of the air barrier system across the six sides of a building that when installed properly will control the infiltration or exfiltration of air through the air SECTION 07 08 27.00 10 Page 3Provided by IHSNot for Resal

13、eNo reproduction or networking permitted without license from IHS-,-,-barrier system. A tight building is essential to a properly functioning HVAC system, to reduce energy consumption and to prevent of problems arising from excessive infiltration or exfiltration into or out of the environmentally co

14、nditioned spaces.The following is recommended reading for the designer:- Building Air Tightness and Air Barrier ContinuityRequirements, Alexander Zhivov, Ph.D and Wagdi AnisAIR BARRIER CONCEPTS AND DESIGNER NOTES:The Designer shall design a continuous air barrier to control air leakage into, or out

15、of, the conditioned space.On drawings dedicated to the air barrier system, identify the surface boundary of the building air barrier system in plan and in section views. Think of the air barrier system as a sealed balloon.Keep in mind that window and door components are part of the building air barr

16、ier system. One must be able to trace a continuous plane of air-tightness throughout each air barrier system envelope.Walls of ventilated crawl spaces logically cannot be the boundary of the air barrier. Nor can the roof above a ventilated attic be part of an air barrier. The openings in such spaces

17、 represent holes in the balloon.Plan views shall show the horizontal extent (by dashed lines) of the air barrier and any individual air barrier zones. Plans shall exclude areas such as mechanical rooms with permanent fixed openings where outside air (ventilation) is allowed to enter the room.Buildin

18、g and/or wall sections shall show the vertical extent (by dashed lines) of the air barrier from floor to roof or ceiling. Ventilated attics must be excluded.Note that air barrier materials and assemblies located within the building thermal envelope experience less expansion and contraction when loca

19、ted within to the inside of the thermal envelope. Ideally the air barrier is in contact with the insulation and located on inside of the insulation. Defining the air barrier limits and boundaries is the responsibility of the building designer.Air barrier materials that also serve as interior finishe

20、s are discouraged because such materials are subject to damage.SECTION 07 08 27.00 10 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The designer is advised to consider the vapor permeance of the air barrier membranes as they relate to their l

21、ocation within the thermal envelope. Air barrier materials with low water vapor permeance are also vapor barriers or retarders. Careful consideration regarding the location of such material is crucial to avoid condensation within the thermal envelope with ensuing mold problems and material failure p

22、roblems.Keep in mind that air barrier membranes may have to withstand forces due to positive and negative pressures caused by wind. As a point of reference, many roofs are designed for a wind uplift pressure of 90 lb/sq.ft. Building wraps are considered inappropriate for air barriers because of the

23、excessive flexing and stressing and point loading of the securing pins.On the drawings, identify each air barrier material, membrane, coating, window component, door component, and other components that compose the air barrier system.Detail the connection of roof and wall air barrier materials. (The

24、 roof-wall interface has been the source of major leaks in the past due to the many irregularly shaped decking and support members intersecting and insufficient attention to detail to the air barrier at this location.)Detail the connection of wall and floor air barrier materials.Detail the connectio

25、n of the wall air barrier materials to window and door components.Detail the penetrations of the air barrier boundary by pipe, ducts, and conduit showing the method of sealing the penetration.Detail the air barrier to be continuous under or around all electrical boxes and panels, plumbing fixture bo

26、xes, and other items affecting air barrier continuity. Do not penetrate the air barrier with lighting fixtures.In other specification sections, specify the air barrier materials used in the system. As defined by The Air Barrier Association of America (ABAA) all air barrier material must have an air

27、permeance less than 0.004 CFM/sq-ft 0.30 in.w.c when tested in accordance with ASTM E2178.In other specification sections, identify the allowable leakage rates of windows, exterior doors, curtain wall assemblies, skylights, and all other such air barrier components in the associated SECTION 07 08 27

28、.00 10 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-specification sections covering these components.Note that Energy Star program has no air leakage requirement for windows and doors. ASHRAE 90.1 contains maximum leakage values determined i

29、n accordance with NFRC 400. These are minimal requirements and do not represent state of the art. The IECC standard contains leakage limits for doors and windows that may be useful as a guideline.There is no known tight sealing overhead door. There is no known manufacturer who publishes tested leaka

30、ge rates for overhead door assemblies. Specify the best weatherstripping available in the specification section covering overhead doors. This specification requires that overhead doors be masked with plastic and sealed during the building air tightness test. This allows the remainder of the air barr

31、ier system envelope to be tested without adjustment for the unknown leakage of the overhead doors.For any fixed open louvers such as at elevator shafts, provide a motorized damper in the closed position and connected to the fire alarm system to open on call from the fire alarm system; also the dampe

32、r must fail in the open position.Provide tight sealing dampers and controls to close all ventilation or make-up air intakes and exhausts during inactive or unoccupied periods. In the HVAC and building controls specification sections, specify all intake, relief, and exhaust dampers to be AMCA 511 lea

33、kage Class 1A.Often, there is but one air barrier system in a building. Sometimes this single system encloses the entire volume of the building.However, there is sometimes a need for multiple air barrier systems in a given building. The lack of interior doorways connecting all areas of a building ma

34、y preclude a single testable air barrier system. An example is a building with multiple living quarters but without interior corridors to connect the rooms into a single system. Individual rooms may become separate air barrier systems in this case.Another example of when multiple air barrier systems

35、 are required is in a vehicle maintenance facility; the administrative area must have an air barrier system complete and separate from the air barrier system serving the maintenance bay area so that the admin area air barrier system is not nullified during warm weather when bay doors are open. Again

36、, separate testing is required for each system, and the common wall between the test zones must be a part of the air barrier envelope for both air barrier systems to be tested. Therefore, the common SECTION 07 08 27.00 10 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted wit

37、hout license from IHS-,-,-wall must be tightly constructed and must include an air barrier. Note that, in this case, the the common wall is included in the calculation of the surface area of both systems to be tested.With multiple air barrier systems, the designer must decide which system will be le

38、ak tested. Individual air barrier systems selected for leakage testing become Test Zones.Each test zone is enclosed by a single air barrier system; it is a balloon unto itself.On the drawings, the designer must identify the Test Zones, usually by number.Calculate the air barrier envelope surface are

39、a (sq.ft.) for each Test Zone. This is the surface area of the volume enclosed by each air barrier system to be tested and includes floors, walls, fenestration, doors, and roof. On the drawings or in this spec section, indicated the air barrier system surface area for each Test Zone.Indicate the all

40、owable leakage rate of each Test Zone (CFM/sq.ft. 0.30 in.w.g.) Current guidance is 0.25 CFM/sq.ft. at a test differential pressure of 0.30 in.w.g. (75 Pascals) based on the surface area of air barrier system envelope.Calculate the maximum test leakage in CFM at 75 Pascals. Indicate this value for e

41、ach Test Zone in the functional requirements.Copy and complete the checklist below and include it in the Architectural Design Analysis.*AIR BARRIER DESIGNER CHECKLISTDrawings:_ Air barrier system drawings are included in the plans. (More than one drawing may be required. It may be necessary to provi

42、de a plan for each floor.)_ A reduced size plan and elevation views of the building indicating the desired perimeter boundary of each air barrier system is included._ The air barrier systems to be tested are shown and given a unique number for reference._ Details showing how the wall air barrier is

43、joined to the roof air barrier are provided.SECTION 07 08 27.00 10 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ Details showing how the wall air barrier is joined to the floor / foundation are provided._ Details showing how the wall air ba

44、rrier is joined to the window components are provided._ Details showing how the wall air barrier is joined to the door components are provided._ Details are provided showing the method of sealing penetrations of the air barrier at the wall, roof, or floor by conduit, piping, cables, etc._ Details sh

45、owing how the air barrier is routed around wall and roof discontinuities are provided (soffits, overhangs, offsets, vestibules, gables, ridges, eaves, etc)._ In the wall and roof sections, materials and accessories that constitute the air barrier system are clearly identified. Examples:board materia

46、ls, liquid applied coatings, spray applied foams, tape, calks, sealants._ In the wall and roof sections, components and assemblies that constitute the air barrier system are clearly identified. Examples: windows, doors, skylights.Note: The following are examples for air barrier materials:- Modified bitumen membranes- Drywall- Cast-in-place concrete- Glass- Metal- Polyethylene film- Spray polyurethane foam- Spray polyethylene foam- Extruded polystyrene- Low permeance building wr