BMC QATAR W.L.L.

Non-destructive testing of wall surface by means of digital moisture meter. Moisture meter provides a quantitative analysis and measurement on the amount of moisture concentration, distribution, behavior and values of moisture in the concrete and other structural elements.

The identification of water intrusion through the envelope of a structure, the damage assessment and the monitoring of a drying process is not obtained with the naked eye alone. Although some damage assessment may be visible in the initial inspection, often the water intrusion will be hidden.
Excess moisture and humidity left within a building environment or its structural elements is the cause of damage to structural materials such as rot, mold growth, reduced insulation values, failure of flooring, roofing, wall support and many others.

CONFORMANCE

Conforms to ASTM D4263 Concrete Moisture Test and ASTM D7438-13 Standard Practice for Field Calibration and Application of Hand-Held Moisture Meters

The portable, hand-operated PosiTest AIR Leak Tester tests the air barrier integrity of single, two-ply and liquid membrane systems, including air barriers, roofing systems, waterproofing and ground liners by locating leaks. In accordance with ASTM E 1186, the PosiTest AIR will indicate whether leaks exist in the test area. It is a simple pass/fail test. Every PosiTest AIR comes complete with (4) bottles of Test Solution. The Test Solution is applied to the test area prior to initialization of the test. The Test Solution has been specially formulated not to have any adverse effects on waterproofing, roofing, air barrier membranes or the PosiTest AIR unit. Do not use on spun polyolefin building wrap.

FEATURES

• Automatic mode depressurizes the test chamber at a user-selectable rate and limit Manual mode allows the user to control the rate of depressurization
• Internal memory stores up to 200 test results with rate, time duration, limit and user-entered Pass/Fail conclusion
• Portable, lightweight tester can be used in any position
• Environmentally sealed enclosure—dustproof and waterproof
• Built-in rechargeable batteries perform up to 200 tests per charge. Continue testing with AC power while batteries recharge. Supplied with universal AC adapter
• High accuracy pressure sensor

FOR USE WITH

• Single and two-ply membranes
• Liquid applied membranes
• Sprayed Polyurethane Foam (SPF)
• Boardstock
• Metal Liners
• Exterior Insulation and Finish Systems (EIFS)
• EPDM roofing systems
• Waterproofing and more

CONFORMANCE

Conforms to National Standards and ASTM E1186

PRINCIPLE OF OPERATION

The earth lead from the Pin Hole Detector (PHD) unit is connected to a convenient earth point on the structure. A high voltage (calculated against the membrane thickness) is applied (using an electrode) to the dry surface of the membrane.
Where there are no faults present the membrane acts as an insulator, stopping the flow of current out of the PHD unit. When the electrode passes over a fault or hole, the high voltage jumps the gap between the electrode and the water or conductive layer under the membrane, causing a current to flow. The audible and visual alarm on the PHD will alert the operator who can mark up the points in need of repair.

METHOD OF TESTING

A suitable point on the structure should be identified as an earth connection for the earth lead of the Pinhole Detector.
Following the instructions in the operating manual of the PHD unit, the output voltage should be set according to the calculation made using the formula shown above. The Earth lead and test probe handle should be connected to the PHD whilst the unit is turned OFF.
With the PHD still turned OFF, extension rods should be connected to the test probe handle. Using the shoe attachment, a suitable electrode should be attached to the opposite end of the extension rods. Any electrode used must be in good condition as a damaged one will not make full contact and faults could be missed.
The electrode should be passed slowly over the membrane surface at a maximum rate of 100mm per second, paying particular attention to edges, holes and irregularities in the coating. The test voltage may need to be reduced to test the edges as the coating may be thin. When a fault is identified by the detector, the electrode should be moved sideways in order to identify the precise location of the problem.

CONFORMANCE

Conforms to ASTM D5162-01

All weatherproofed areas in a structure require periodic inspection and maintenance in order to perform as designed and to provide a long and effective service life particularly for accessible areas such as roofs. Periodic inspection and maintenance is also typically required by roofing system manufacturers to keep roofing warranties in full force and effect. Although all building owners should establish a periodic roof inspection program, inspection and maintenance of any roof should be undertaken only by qualified persons who are familiar with safe roofing practices, including all applicable occupational, health and safety regulations relating to the roofing and construction industries.
Because modern waterproofing systems contain a wide variety of components and installation techniques, all site inspections should be conducted by a qualified professional. Typically two inspections should be conducted each year, one in the spring and one in the late fall.
All condition evaluations are to be performed with the general principles that should be applied to all types of surveys:

1. Identify the existing system type;
2. Establish existing conditions;
3. Assess the problem(s), and;
4. Determine the solution.

These principles apply to a wide range of survey types, including:

• System evaluations to determine repair and replacement needs.
• Leak / moisture intrusion investigations.
• General condition assessments.
• Code review.
• Moisture surveys (invasive and non-invasive).
• Testing witness

Scope is to generate documents that combine a combination of strong and knowledgeable technical writing, with detailed and concise graphics to clearly illustrate the point of a report. The intent: thoroughly and accurately documented conditions so that the problem(s) can be identified and properly addressed based on criteria identified during the assessment.

Quality assurance and quality control is an important aspect in today's construction market; it is equally valuable to make informed and intelligent decisions during the design process in order to achieve long-term success.
Our technical staff is trained to conduct thorough and detailed inspections, with services oriented to address important inspection milestones, including:

• Confirmation and documentation of system components and materials.
• Documenting acceptable conditions for system installation.
• Documenting and recording installation techniques and progress.
• Documenting potential installation and detailing problems, and making recommendations for improvement, if required.
• Confirming that installation is in accordance with applicable installation instructions.
• Confirming final acceptance (and certification, when required) of the installation.
• It is very important to document construction activities during all phases of a particular project. detailed Field Reports are to be prepared.

All QA/QC inspections are supplemented with photography and color reproduction reports distributed to key project personnel. Typically, all daily Field Reports are distributed by the start of the following business day to facilitate correction of items of non-conformance and significantly reduce the risk of construction defects, which can lead to water infiltration, related problems, and costly litigation and repair events
The frequency of QA/QC inspections can vary depending on an individual project. The company should provide both full-time and part-time inspection services. Full-time inspection services include site visits and observations of construction progress on a daily basis when construction is underway. Detailed Field Reports are to be generated and issued on a daily basis to appropriate parties.
Part-time inspection services are generally established by the complexities and demands of a particular project. It is common to provide, as a minimum, once-per-week site visits for most construction projects.

Roof maintenance and repair can consume large proportions of a building owner's overall maintenance budget. Roofs that are not managed and maintained properly often fail prematurely, with failures occurring at the most critical of times. Roof leaks lead to long-term building damage, immediate damage to building equipment and contents, and can disrupt normal business operations. Problems like these can be very costly.
Our technical staff is trained to conduct thorough and detailed inspections, with services oriented to address important inspection milestones, including:

• Review of owner-provided documentation, if available.
• Confirmation of roof dimension and penetration locations.
• Review of maintenance and repair history.
• Core testing where required, to determine the type and condition of existing roof membrane, insulation, vapor barrier and other membrane components.
• Identify building structure and deck types.
• Identify drainage type, slope, and other related conditions.
• Identify flashing and counter flashing types and conditions.
• Identify penetrations and type.
• Identify roof age and estimated remaining life of roof system and components.
• Establish key design criteria for each roof area.
• Once the roof system is evaluated in the field, the information is properly documented and recorded in both hard and soft copies.

Our technical staff is trained to conduct thorough and detailed inspections, with services oriented to address important inspection milestones, including:

New buildings are constantly being designed and construct- ed. The scope is to design roofing and waterproofing sys- tems and assemblies that are watertight at the roof, as well as the entire building envelope. Whether the project is anew construction or modifications to an existing building, the company is to provide specialty services in the form of de- sign review. As many have come to know, "industry standards" do not always apply to all building designs and flashing details. In many cases, it takes creative solutions to come up with a resolution that is long-term and low-maintenance.
Very important to keep updated on new roofing and water- proofing products and installation standards for this busi- ness and to prepare a detailed reference technical library.
Our design review services to include:

• General scope review and recommendations
• Specification review
• Specification writing
• Waterproofing Drawing and As-Built Drawing review
• Drawing preparation (CAD)
• Product review and evaluation
• Substitution request review
• Value-engineering process
• Waterproofing submittal review
• RFI review

Our technical staff is trained to conduct thorough and detailed inspections, with services oriented to address important inspection milestones, including: