Weir/Andrewson Associates provides digital infrared (IR) thermography consulting services for numerous commercial and institutional buildings. We have a broad depth of experience in areas such as: roofing, waterproofing, curtain wall systems, structural components and systems, site drainage, and so forth.

W/A is able to perform non-destructive condition surveys using digital infrared (IR) thermography.  Infrared thermography allows W/A to pinpoint thermal anomalies on building materials, which may translate to underlying construction deficiencies or deteriorated building components. 
 

FlexCam® Pro

• 5-inch high resolution, sunlight readable color LCD
• 180-degree articulating lens joint
• Highly sensitive detector produces exceptionally clear and crisp video images
• Eight different color palettes enhance versatility of the image on the large display
• Records subtle temperature changes for both moving and still targets in real-time
• Precise full-screen temperature measurement from 0°-600°C
• Programmable image capture saves thermal images at preset time intervals, or on high/low temperature triggers
• Easily attach customized comments to your images
• FlexView™ software provides comprehensive post-image temperature analysis and report generation capabilities
• Programmable buttons allow for quick access to frequently used commands
• Ergonomically efficient design facilitates scanning of awkwardly positioned targets and reduces user fatigue

• Moisture Inspections. Accurately detect and prove moisture issues located behind interior walls, in ceilings or under carpet-covered floors have been completely resolved.
• Building Energy. Perform infrared energy audits for residential and commercial applications. Increase the thermal efficiency of a home or building by scanning for thermal heat loss, moisture invasion, concrete integrity and heat ventilation problems.  
• Home Inspection.  
• Electrical inspections in buildings, plants, facilities, refineries.
• Thermal heat loss inspections for buildings, plants, facilities, refineries.
• Moisture contamination evaluations in buildings, condo's, plants facilities
• Concrete integrity inspections
• Concrete Water Heated floor inspections for leaks and temperature distribution
• Flat roof leak detection for buildings, plants, facilities
• Power generation generator inspections.
• Power Plant boiler flue gas leak detection
• Substation Electrical inspections, transformers and capacitor evaluation
• Over head urban and rural distribution electrical inspections
• Electrical motor inspections, mechanical bearing inspections
• Heat ventilation air conditioning equipment evaluation
• Cold Storage cooling losses.
• Furnace refractory (insulation) inspections

Diagnostic tool

The primary diagnostic procedure for determining the thermal performance of a building envelope is infrared thermography. It can be used to identify heating and cooling loss due to poor construction, missing or inadequate insulation and moisture intrusion. Correcting the defects plays a significant role in increasing building efficiency and structural integrity.

Thermography can identify surface temperature variations of the building envelope, which relates to problems in the structure, thermal bridging, moisture content and air leakage.

Two primary mechanisms for heat loss in buildings are conduction through the walls and air leakage. Both can be identified from the surface of the building with infrared thermography. Early correction of the faults identified can be made before extensive damage occurs

Conductive Losses
Problems identified as conductive losses are: missing insulation, improperly installed or compressed insulation, shrinkage or settling of various insulating materials; excessive thermal bridging in joints between walls and the top and bottom plates; moisture damage to insulation and building materials; heat loss through multi-pane windows with a broken seal; leaks in water pipes; damaged heat ducts; location of, or leakage in buried steam lines, water lines or underground sprinkler systems, etc.

 

 

 

 

 

 

 

Air Leakage
Air leakage is the passage of air through a building envelope, wall, window, joint, etc. Leakage to the interior is referred to as infiltration and leakage to the exterior is referred to as exfiltration. Excessive air movement significantly reduces the thermal integrity and performance of the envelope and is, therefore, a major contributor to energy consumption in a building.

In addition to energy loss caused by excessive air leakage, it can cause condensation to form within and on walls. This can create many problems; reduce insulation R-value, permanently damage insulation, and seriously degrade materials. It can rot wood, corrode metals, stain brick or concrete surfaces, and in extreme cases cause concrete to spall, bricks to separate, mortar to crumble and sections of a wall to fall jeopardizing the safety of occupants. It can corrode structural steel, re-bar, and metal hangars and bolts with very serious safety and maintenance issues. Moisture accumulation in building materials can lead to the formation of mold that may require extensive remediation.

Virtually anywhere in the building envelope where there is a joint, junction or opening, there is potential for air leakage. With the use of the infrared imagers, one can identify thermal irregularities on the building envelope and the thermal pattern discerning whether the pattern indicates a problem with the insulation, air leakage or the building structure.