Significance and Use
Although infrared imaging systems have the potential to determine many factors concerning the thermal performance of a wall, roof, floor, or ceiling, the emphasis in this practice is on determining whether insulation is missing or whether an insulation installation is malfunctioning. Anomalous thermal images from other apparent causes may also be recorded as supplemental information, even though their interpretation may require procedures and techniques not presented in this practice.
1.1 This practice is a guide to the proper use of infrared imaging systems for conducting qualitative thermal inspections of building walls, ceilings, roofs, and floors, framed in wood or metal, that may contain insulation in the spaces between framing members. This procedure allows the detection of cavities where insulation may be inadequate or missing and allows identification of areas with apparently adequate insulation.
1.2 This practice offers reliable means for detecting suspected missing insulation. It also offers the possibility of detecting partial-thickness insulation, improperly installed insulation, or insulation damaged in service. Proof of missing insulation or a malfunctioning envelope requires independent validation. Validation techniques, such as visual inspection or in-situ R-value measurement, are beyond the scope of this practice.
1.3 This practice is limited to frame construction even though thermography can be used on all building types. ,
1.4 Instrumentation and calibration required under a variety of environmental conditions are described. Instrumentation requirements and measurement procedures are considered for inspections from both inside and outside the structure. Each vantage point offers visual access to areas hidden from the other side.
1.5 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. In particular, caution should be taken in the handling of any cryogenic liquids or pressurized gases required for use in this practice. Specific precautionary statements are given in Note 1 and Note 3.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO6781 :1983 Thermal Insulation--Qualitative detection of Thermal Irregularities in Building Envelopes -- Infrared Method
C168 Terminology Relating to Thermal Insulation
E1213 Test Method for Minimum Resolvable Temperature Difference for Thermal Imaging Systems
building envelope; infrared; in-situ; thermal insulation; wall systems; workmanship; Building envelopes; Air leakage testing--building materials/constructions; Emittance; Field testing--thermal insulation; Image analysis; Infrared (IR) analysis; In-situ inspection/analysis; Leak testing--building constructions/materials; MDTD (minimum detectable temperature differences); Nondestructive evaluation (NDE)--nonmetallic materials; Reflectance and reflectivity; Spatial frequency; Surface analysis--building construction materials/insulation; Temperature tests--thermal insulation; Thermal insulating materials; Thermographic inspection; Walls; Wood frame constructions
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