07_08_27.00_10_-_MTF_Specs_-_Amendment_0002.pdf

Addition to Maintenance Training Facility, JB MDL, NJ JBMDLADDITIONMTF

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BUILDING AIR BARRIER SYSTEM TESTING FOR COMMISSIONING

02/13

PART 1 GENERAL

1.1 SUMMARY

The air barrier shall be contiguous and connected across the six surfaces of the enclosed air barrier envelope indicated. Perform building thermography and air barrier leakage tests to demonstrate that the air barrier materials are properly installed and joined; that windows, doors, dampers, and ducts are sufficiently air tight; and that the overall air barrier envelope is sealed. The quality of the construction of the air barrier systems, including the joining and sealing of the air barrier materials and accessories must be sufficient to limit leakage under pressure to the maximum leakage functional requirements outlined in this specification.

Passing an air barrier leakage test and thermography test to demonstrate that the building envelope is properly sealed and insulated will result in system acceptance. Report the results of the thermograph and leakage tests. The testing and reporting shall be performed in accordance with the procedures outlined in this specification.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referenced within the text by the basic designation only.

AMERICAN SOCIETY FOR NONDESTRUCTIVE TESTING (ASNT)

ASNT CP-105 (2011) ASNT Standard Topical Outlines for Qualification of Nondestructive Testing Personnel - Item No. 2821

ASNT SNT-TC-1A (2011; Text Correction 2013) Recommended Practice for Personnel Qualification and Certification in Nondestructive Testing

ASTM INTERNATIONAL (ASTM)

ASTM C1060 (2011a) Standard Practice for Thermographic Inspection of Insulation Installations in Envelope Cavities of Frame Buildings

ASTM D4541 (2009; E 2010) Pull-Off Strength of Coatings Using Portable Adhesion Testers

ASTM E1186 (2003; R 2009) Standard Practices for Air Leakage Site Detection in Building Envelopes and Air Barrier Systems

ASTM E1827 (2011) Standard Test Methods for

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Determining Airtightness of Buildings Using an Orifice Blower Door

ASTM E779 (2010) Standard Test Method for Determining Air Leakage Rate by Fan Pressurization

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 6781 (1983) Thermal Insulation - Qualitative Detection of Thermal Irregularities in Building Envelopes - Infrared Method

1.3 DEFINITIONS

The following terms as they apply to this section:

1.3.1 Air Barrier Accessory

Products designated to maintain air tightness between air barrier materials, air barrier assemblies and air barrier components, to fasten them to the structure of the building, or both (e.g., sealants, tapes, backer rods, transition membranes, fasteners, strapping, primers).

1.3.2 Air Barrier Assembly

The combination of air barrier materials and air barrier accessories that are designated and designed within the environmental separator to act as a continuous barrier to the movement of air through the environmental separator.

1.3.3 Air Barrier Component

Pre-manufactured elements such as windows, doors and service elements that are installed in the environmental separator.

1.3.4 Air Barrier Material

A building material that is designed and constructed to provide the primary resistance to airflow through an air barrier assembly.

1.3.5 Air Barrier System

The combination of air barrier assemblies and air barrier components, connected by air barrier accessories that are designed to provide a continuous barrier to the movement of air through an environmental separator. This includes the roof, wall, and floor assemblies, and the wall and roof components, and may include interior walls or partitions.

There may be more than one air barrier system in a single building.

1.3.6 Air Leakage Rate

The rate of airflow (CFM) driven through a unit surface area (sq.ft.) of an assembly or system by a unit static pressure difference (in.w.g or Pa) across the assembly. (examples: CFM/sq.ft. @ 0.30 in.w.g, or CFM/sq.ft. @ 75 Pa)

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1.3.7 Air Permeance

The rate of airflow (CFM) through a unit area (sq.ft.) of a material driven by unit static pressure difference (in.w.g. or Pa) across the material.

1.3.8 Environmental Separator

The parts of a building that separate the controlled interior environment from the uncontrolled exterior environment, or that separate spaces within a building that have dissimilar environments.

1.3.9 Test Zone

The portion of or volume within a building enclosed by an air barrier system which is to be tested for air leakage. The test zones are indicated.

1.4 PRECONSTRUCTION CONFERENCE

Organize pre-construction conferences between the air barrier inspector and the sub-contractors involved in the construction of or penetration of the air barrier system to discuss where each sub-contractor begins and ends, the sequence of installation, and each sub-contractor's responsibility to ensure airtight joints, junctures, penetrations and transitions between materials, products, and assemblies of products specified in the different sections to be installed by the different sub-contractors.

1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval.. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-04 Samples

SD-07 Certificates

Thermography Test Firm

Two copies 60 days prior to thermography testing.

Thermography Test Technician

Two copies 60 days prior to thermography testing.

Air Barrier Leakage Test Firm; G, RO

Two copies 60 days prior to leakage testing.

Air Barrier Leakage Test Technician; G, RO

Two copies 60 days prior to leakage testing.

SD-06 Test Reports

Thermography Test Procedures; G, RO

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Two copies 30 day prior to thermographic testing / examination.

Building Air Barrier Leakage Test Procedures; G, RO

Two copies OF detailed test procedures indicating the test apparatus, the test methods and procedures, and the analysis methods to be employed for the Building Air Barrier Leakage Test 30 prior to leakage testing.

Design Review Report; G, RO

Two copies not later than 14 days after approval of the Air Barrier Inspector Qualifications.

Thermographic Test Report; RO

Two copies of interim reports 10 days after completion.

Four copies of the final report 14 days after completion.

Air Barrier Leakage Test Report; RO

Two copies of interim reports 10 days after completion.

Four copies of the final report 14 days after completion.

1.6 AIR BARRIER SYSTEM SURFACE AREA AND FUNCTIONAL REQUIREMENTS

The building air barrier systems shall meet the following leakage functional requirements. The allowable leakage rate and the maximum leakage are at a pressure of 0.30 in.w.g.

a. Test Zone 1 Air Barrier System

(1) Surface Area: [_____] square feet

(2) Allowable leakage rate: 0.25 CFM/sq.ft

(3) Maximum leakage: [_____] total CFM

1.7 QUALITY CONTROL

1.7.1 Qualifications

1.7.1.1 Thermography Test Firm

Minimum 2 years experience in thermographic testing and analysis, with a minimum of 3 successful projects of similar type and scope in the previous 3 years, using the specified testing standard, and employing qualified test technicians under the supervision of a Level III Certified Infrared Thermographer.

1.7.1.2 Thermography Test Technician

Possess Level II Training and Certification from a firm whose training and certification program complies with the recommended practice established by ASNT SNT-TC-1A and ASNT CP-105. Possess a certificate indicating successful completion of a course and examination specifically related to building envelope thermography. Document demonstration of 2 years experience in infrared thermography testing including interpreting and reporting findings in accordance with the requirements of ASTM C1060.

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1.7.1.3 Air Barrier Leakage Test Firm

Minimum 2 years experience in air tightness testing and analysis, with a minimum of 3 successful projects of similar type and scope in the previous 3 years, using the specified testing standard, and employing qualified test technicians.

1.7.1.4 Air Barrier Leakage Test Technician

Two years experience in air tightness testing using the specified testing standard and equipment.

1.7.2 Design Review

The Air Barrier Inspector shall review the Contract Plans and Specifications and advise the Contracting Officer of any deficiencies that would prevent the construction of an effective air barrier system. The Air Barrier Inspector shall provide a Design Review Report individually listing each deficiency and the corresponding proposed corrective action necessary for proper air barrier system.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 QUALITY CONTROL

3.1.1 Documentation and Reporting

Document the entire installation process on daily job site reports. These reports include information on the Installer, substrates, substrate preparation, products used, ambient and substrate temperature, the location of the air barrier installation, the results of the quality control procedures, and testing results.

3.1.2 Quality Control Testing

Conduct the following qualitative and quantitative tests and inspections in the presence of the Contracting Officer during installation of the air barrier system.

a. Qualitative Testing and Inspection As Applicable:

(1) Provide a Daily Report of Observations with a copy to the Contracting Officer.

(2) Ensure continuity of the air barrier system throughout the building enclosure and that all gaps are covered, the covering is structurally sound, and all penetrations are sealed allowing for no infiltration or exfiltration through the air barrier system.

(3) Ensure structural support of the air barrier system to withstand design air pressures.

(4) Ensure masonry surfaces receiving air barrier materials are smooth, clean, and free of cavities, protrusions and mortar droppings, with mortar joints struck flush or as required by the

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(5) Ensure site conditions for application temperature, and dryness of substrates are within guidelines.

(6) Ensure substrate surfaces are properly primed.

(7) Ensure laps in materials are at least a 2-inch minimum, shingled in the correct direction or mastic applied on exposed edges with no fishmouths.

(8) Ensure that mastic is applied on cut edges.

(9) Ensure that a roller has been used to enhance adhesion.

(10) Measure application thickness of liquid applied materials to manufacturer's specifications for the specific substrate.

(11) Ensure that the correct materials are installed for compatibility.

(12) Ensure proper transitions for change in direction and structural support at gaps.

(13) Ensure proper connection between assemblies (membrane and sealants) for cleaning, preparation and priming of surfaces, structural support, integrity and continuity of seal.

b. Quantitative Tests:

(1) Provide written test reports of all tests performed with a copy to the Contracting Officer.

(2) Determine the bond strength of coatings to substrate in accordance with ASTM D4541.

3.2 THERMOGRAPHY TEST

Upon completion of construction, and completion of quality control measures for the air barrier system and the thermal envelope, infrared thermography tests shall be conducted.

3.2.1 Field Conditions

Perform testing under conditions stipulated in test standards, in instrument manufacturer's instructions, and in this Section. Perform testing on dry building surfaces after sunset and prior to sunrise under the following environmental conditions:

a. Wind speed: Not greater than 15 mph.

b. Outside Air Temperature: Either a minimum of 18 degrees F above building interior temperature or a minimum of 18 degrees F below building interior temperature, for a minimum of 4 hours prior to test, and not varying more than 30 percent during the test.

c. Indoor Air Temperature: At constant temperature varying not more than 4 degrees F.

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d. Direct Solar Exposure of Surfaces: No direct solar radiation on inspected surfaces during and for minimum 4 hours prior to inspection for frame construction, 8 hours for masonry veneer construction, at acceptable outside air temperature.

3.2.2 Thermography Test Procedures

The building envelope shall be tested using Infrared Thermography technology. The thermography testing shall be completed in accordance with the requirements of ASTM C1060 and ISO 6781. Perform a complete thermographic inspection consisting of full exterior and interior inspection of the complete thermal envelope and air barrier system. Note areas of the envelope that the inspection cannot cover due to limited or no access. The Contracting Officer shall be given the opportunity to witness the testing. Conduct testing just before the Building Air Barrier Leakage Test. Also, conduct testing during the Building Air Barrier Leakage Test so that air leaks are detected. If the building air barrier leakage test is failed, Thermographic testing shall be repeated just before and during subsequent air barrier leakage tests until the leakage test is successful.

Address the cause and required corrective action for all anomalous thermal images resulting from the examination.Submit detailed test procedures indicating the test apparatus, the test methods and procedures, and the analysis methods to be employed for the Thermography Test.

3.2.3 Thermographic Test Report

Include thermographs in color and a color temperature scale to define the temperature indicated by the various colors. Identify the high temperature reading, the outdoor air temperature, the building indoor air temperature, and the wind speed and direction. Note any areas of compromise in the building envelope, and note all actions required and taken to correct those areas. Final thermography test report shall demonstrate that the problem areas have been corrected. Submit the complete test and analysis.

3.3 AIR BARRIER LEAKAGE TEST

Upon completion of construction, and quality control measures for the air barrier system, building air barrier leakage tests shall be conducted.

3.3.1 Building Air Barrier Leakage Test Procedures

Perform the air leakage test in accordance with ASTM E779 with the following additions and exceptions:

a. The test consists of measuring the flow rates required to establish a minimum of 12 positive and 12 negative building pressures. The lowest test pressure shall be 0.10 in.w.g or 25 Pa; the highest test pressure shall be 0.30 in.w.g or 75 Pa; and there must be at least 0.10 in.w.g or 25 Pa difference between the lowest and highest test pressures.

b. Measure the test pressure in a representative location such that pressures in the extremities of the enclosure can be shown to not exceed 10 percent of the measured test pressure. At least 12 bias pressure readings must be taken across the envelope and averaged over at least 20 seconds each before and after the flow rate measurements.

None of the bias pressure readings must exceed 30 percent of the minimum test pressure when testing in both directions.

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d. The mean value of the air leakage flow rate calculated from measured data at 0.3 in.w.g shall not exceed the air barrier functional requirements specified and the upper confidence limit as defined by ASTM E779. Reference measurements at standard conditions of 14.696 psi and 68 degrees F.

e. Conduct the test with ventilation fans and exhaust fans turned off and the outdoor air intake dampers and exhaust dampers closed. Provide a responsible HVAC technician with the authority to place the HVAC system in the correct mode for the pressure test. The test technician shall have unhindered access to mechanical rooms, air handlers, exhaust fans, and outdoor air and exhaust dampers.

f. Ensure that all windows in the test enclosure are kept closed.

Prohibit entry and exit through doors in the test enclosure during the test. Discard data collected while the pressures and flows are affected by a door opening and closing. The openings of roll-up or roll-back type overhead doors shall be masked with plastic and sealed.

Internal doors within the air barrier test enclosure shall be open;

this includes access doors to attics enclosed by the air barrier system.

g. Perform a diagnostic evaluation in accordance with ASTM E1186, whether the building achieves the air barrier system functional requirement or not. Use the diagnostic evaluation to assist in identifying and eliminating air leakage so the system meets the functional requirement upon retesting. Also, express the testing results in terms of the Equivalent Leakage Area (EqLA) at 0.30 in.w.g or 75 Pa. The EqLA is the equivalent area of a flat plate orifice that leaks the same amount as the building envelope at 0.30 in.w.g or 75 Pa.

3.3.2 Fan Pressurization Test

Conduct the fan pressurization test to determine final compliance with the air barrier system functional requirement when all components of the air barrier system have been installed and inspected, and have passed any intermediate testing procedures. The test may be conducted before finishes that are not part of the air barrier system have been installed. For example, if suspended ceiling tile, interior gypsum board, or cladding systems are not part of the air barrier system, the test may be conducted before they are installed.

3.3.3 Air Barrier Leakage Test Report

Submit a certified written report of each inspection, test, or similar service. Written reports of each inspection and test or similar service shall include all the Report items described in ASTM E1827. Additionally, the report shall also include the following information:

a. Date of Issue

b. Project title and number

c. Name, address, and telephone number of testing agency

d. Dates and locations of samples and tests or inspections

e. Names of individuals making the inspection or test

f. Designation of the Work and test method

g. Identification of product and Specification Section

h. Complete inspection or test data

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i. Test results and an interpretation of test results for each test zone

j. Name and signature of laboratory inspector

k. Recommendations on retesting

l. Comments or professional opinion on whether inspected or tested Work complies with Contract Document requirements

3.4 AIR BARRIER FUNCTIONAL REQUIREMENTS FAILURE

If the final air barrier test indicates that the leakage of the constructed air barrier system exceeds the maximum leakage specified, coordinate with the Designer of Record, the subcontractors, and the Government to immediately determine the cause of the failure, develop a method to change or repair the air barrier system. Then, develop and schedule a re-test of the air barrier system. Repeat until the air barrier system test is passed.

3.5 REPAIR AND PROTECTION

Upon completion of inspection, testing, or sample taking and similar services, repair damaged construction and restore substrates and finishes, protect construction exposed by or for quality control service activities, and protect repaired construction.

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