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Water Seepage Investigation Services
 
 
 
What are the common causes of water leakage?
Common causes of water leakage :
 
  • * Leakage in the drainage pipes of the upper, adjacent or your own flat.
  • * Leakage in the water supply pipes of the upper, adjacent or your own flat.
  • * Deteriorated waterproofing of floor slabs or bath-tub seals.
  • * Seepage of waste water or rain water through roof / external wall.
  •  
    water seepage Testing methods
     
  • 1. Dye Tracer Test
  • 2. Electrical capacitance Investigation
  • 3. Electrical Resistance Investigation
  • 4. Microwave Leakage Testing
  • 5. Infrared Thermography Testing
  • 6. Pressure Test
  • 7. Humidity Sensors Test
  • 8. Electrical Earth Leakage Test
  • 9. Flood Testing
  • 10. Water Spray Test
  • 11. Acoustic Leak Testing
  •  
    WATER LEAKAGE ACCURACY OF INVESTIGATION
     
  • 1. Two common sources of water seepage in buildings are from the external, e.g. rainfall, and from above or the alleged source sites, e.g. domestic use of water.
  • 2. The former is obvious and can readily be identified with certainty. The main difficulty is to identify the source/cause of water seepage coming from above (e.g. from the bathroom immediate above an alleged water seepage site).
  • 3. If the parties are cooperative, there is a good chance that the problem of water seepage can be alleviated by investigating/identifying the sources and carrying out proper repair. In majority of the cases, repeated repair will have to be carried out
  •  
    WATER LEAKAGE COMMON METHODS OF INVESTIGATION
     
  • Methodology 1: The alleged source site is first subjected to dyed water to simulate the water source(s). Afterwards, measurement of moisture is carried out in the alleged water seepage site. Typical examples include flooding test, water spray test and dye test. It is generally considered as the most direct means to identify/differentiate different water source(s). However, it is not applicable in majority of the cases due to non-corporation of owners/occupiers of the alleged source site thereby disallowing any flooding test, water spray test or dye test to be carried out from the alleged water seepage site.
  •  
  • Methodology 2: Without simulating the water source(s), measurement of moisture is carried out in the alleged water seepage site. Source(s) and cause(s) of water seepage are interpreted from the measurement and this requires high level of professional knowledge and expertise.
  •  
  • The commonly used techniques for investigating the causes and/or sources of water seepage.
  •  
    Common methods of investigating water seepage
     
  • 1. Dye test - Through thickness penetration
  • 2. Protimeter measurement - Limit to surface
  • 3. Infrared thermography - From surface to nominal depth
  • 4. Microwave moisture meter - Up to 110 mm or more
  •  
    1. Dye Test
     
  • Dye test is the most commonly used technique, inexpensive and requiring minimal technical skills. It is used by the Joint Office as the routine method for systematic investigation and is recommended as a DIY investigation tool (FEHD and BD). Dye test is carried out by ponding the alleged source site (e.g. flooding the bathroom) with dyed water (“the ponding area”). The result is positive if dye is visible from below. Recently, fluorescent dyes are used thereby signs of water seepage are observed from below by an ultraviolet light in dark condition. Quite often dye is not detected from below in the damp area (“negative results”) even though water originates from the ponding area.
  •  
    2. Protimeter Measurement
     
  • Protimeter is a device commonly used to assess the surface moisture content of a material. Surface moisture content is measured through pushing two needles/electrodes into the material. It enables rapid assessment of surface moisture content. Due to the heterogeneous properties of concrete and unknown properties of finishes on the surface of concrete, readings obtained from a protimeter cannot be taken directly as surface moisture content, unless the readings reflect very high moisture content. As precalibration of surface moisture content of concrete is virtually not possible, readings are taken from both affected areas and non-affected areas (or control points) and the values are compared to estimate the surface moisture content of affected areas
  •  
    3. Infrared thermography
     
  • Infrared thermography is based on the principle that wet and dry building components have different rates of heat gain and retention. This technique is normally applied using a hand-held infrared camera with recording device . Wet zone is identified based on physical characteristics of wet material with slower heat gain and heat loss. It may be able to display water paths, hidden water pipes, etc. that are close to the surface. As temperature differential can be very small (between 0.1C to 0.5C) for identifying a wet area, an uneven surface, e.g. spalling/delamination of finishes, may distort the temperature gradient making the thermographic images unreliable. this is usually the case in an affected area
  •  
    4. Microwave moisture meter
     
  • Microwave moisture meter has gained popularity in measuring the moisture content of a material. It is based on the propagation of electromagnetic waves in the material. Moisture content is estimated from the energy loss due to absorption of water. The device includes a generator and a receiver . It has the disadvantage of requiring a good contact surface for both generator and receiver which may not be possible to achieve in majority of the cases. It is also sensitive to heterogeneous nature of concrete that may cause error in the readings obtained from the measurement. As each measurement is presented as averaged moisture up to a certain depth, accuracy is also adversely affected by the presence of cavities, pipes or reinforcement embedded inside concrete.
  •  
  • Apart from dye test with the advantage of identifying water path(s) or source(s) of water seepage directly, the above are all interpretive testing methods. In some cases, microwave moisture measurement may also provide good indication of the water path(s) or source(s) of water seepage but this largely depends on the quality of the test data
  •  
  • Protimeter and infrared thermography can only identify the presence of moisture near the surface. As moisture measurements are indirectly assessed via electrical resistance and heat, respectively, foreign materials inside concrete may cause similar changes on the measurement to that of water. For instance, presence of salt may affect the reading and thus the accuracy of the measurement. Therefore, the data is used to compare the moisture condition between two different areas of the same material, namely control points not affected by water seepage and the affected areas.
  • Data obtained from the field works has suggested that there exists no universal method that can provide reliable results to identify the cause(s) of water seepage. Method of investigation has to be determined case by case based on the condition of concrete at the surface and in the interior
  •  
  • As indicated in the above, accuracy depends on the condition of the affected areas and how the tests are performed. Correct interpretation of the test results further relies on an understanding of the underlining principle; limitations; and the pros and cons of applying different methods of investigations. We are of the view that there is in lack of an expertise or a unify approach to select the proper tests; to perform the tests and/or to interpret the results. Obviously, it is very difficult if not impossible task for the parties, who are laymen to the tests, to select the tests; to perform the tests and/or to interpret the results, save and except dye test. A performance-based approach is proposed to handle water seepage in buildings.
  •  
    CONCLUSIONS
     
  • Pursuant to reported cases and relevant provisions in the ordinances, the standard of investigation is to be one with high degree of certainty and the investigation so conducted is able to distinguish all possible causes of water seepage. Common difficulties in resolving water seepage disputes are due to (a) inability to identify the source(s)/cause(s) of water seepage and (b) non-corporation of owners/occupiers of premises alleged of causing water seepage. In respect of (a), it depends on the condition of the affected areas; how the tests are performed; and correct interpretation of the test results. It is necessary to improve and/or develop methods of investigating water seepage. As an alternative approach, it is suggested to identify the source(s) of water seepage from moisture readings obtained from alleged water seepage sites and vibration readings obtained from exposed waste pipes without entering the alleged source sites. Further, it is desirable to shift the method of investigation from an informative approach to a consultative approach with interaction by the party/parties. We need to dedicate tools to match the accuracy/reliability of methods of investigation with the goals of the parties and the goals of the investigation and to provide the parties with opportunities to decide how they would like to proceed. By following a performance-based approach, it is possible to reduce the overall cost and time by not carrying out unnecessary and/or unreliable tests. This may ultimately assist the public to resolve the problem of water seepage in buildings.
  •  
    CIVIL NDT TESTING - NON-DESTRUCTIVE TESTING SERVICES
     
    CONCRETE FOR BRIDGES, DAMS, BUILDINGS, SUBWAYS, TUNNELS ETC..
    • Ultrasonic Pulse Velocity Testing
    • Rebound Hammer Testing
    • Rebar Locator
    • Depth of concrete
    • Half Cell Potential Testing
    • Carbonation Testing
    • Pile Integrity Testing
    • Visual Inspection and Field Services
    CIVIL NDT - CONCRETE TESTING SERVICES
    CONCRETE FOR BRIDGES, DAMS, BUILDINGS, SUBWAYS, TUNNELS ETC..
    • 1. Ultrasonic Pulse Velocity Testing
    • 2. Rebound Hammer Testing
    • 3. Rebar Locator
    • 4. Depth of concrete
    • 5. Half Cell Potential Testing
    • 6. Carbonation Testing
    • 7. Pile Integrity Testing
    • 8. Visual Inspection and Field Services
    • 9. In-Situ Compressive Strength (design strength, and existing structures)
    • CONSTRUCTION MATERIALS TESTING EQUIPMENTS:
    • 1. Pile Testing Systems
    • 2. Structural Monitoring Systems
    • 3. Asphalt Testing Systems
    • 4. Pavement Testing
    • 5. Rock and Soil Laboratory Test Systems
    • 6. Non-Destructive Tests for Concrete
    • 7. Geotechnical & Vibration Monitoring Systems
    • 8. Pavement Condition Monitoring
    • 9. Concrete and Cement Lab Systems
    • LAB TESTING - CONCRETE AND CONCRETING MATERIALS
    • Laboratory Tests on Construction Materials as per Standards.
    • 1. Cement
    • 2. Aggregate
    • 3. Bricks
    • 4. Blocks
    • 5. Tension test on rebars
    • 6. Chemical test on Rebars
    • 7. Water Analysis
    • 8. Cube test
    • 9. Accelerated cube test (ACT)
    • 10. Rapid Chloride test (RCPT)
    • 11. Concrete Mix Design
    • 12. Fly ash
    • 13. Slag and Silica fume
    • 14. Self compacting concrete
    • 15. Temperature controlled concrete
    • CIVIL NDT AND CONCRETE - TESTING SERVICES
    • 1. Civil NDT Investigation
    • 2. Concrete Investigation
    • 3. coating Thickness Measurement on Concrete Structures
    • 4. Compressive Strength Testing
    • 5. Concrete Mix Design
    • 6. Bitumen Mix Design
    • 7. Core extraction Testing
    • 8. Core Sampling Testing
    • 9. Concrete Core Testing
    • 10. Concrete Cube Testing
    • 11. Chemical Analysis
    • 12. Electrical Resistivity Testing
    • 13. Ground Penetrating Radar Survey
    • 14. Sieve Analysis
    • 15. Ultrasonic Low Frequency Testing
    • 16. UPV Testing
    • 17. Vibration Analysis of Building
    • 18. Leak Testing
    • 19. CT Scan on Conctete
    • 20. Element Analysis on Concrete
    • 21. Impact Echo Testing
    • 22. Linear Polarization Testing
    • 23. Load Testing
    • 24. Permeability Testing
    • 25. petrography of concrete
    • 26. Pullout Testing
    • 27. Cut and Pullout Testing (CPO Test)
    • 28. Impulse Response Test
    • 29. Impact Echo Test
    • 30. Ground Penetrating Radar (GPR)
    • 31. Crack Depth Measurement
    • Reinforcement Location and Corrosion Assessments
    • 1. Reinforcement Location by Ground Penetrating Radar (GPR)
    • 2. Cover Assessment
    • 3. Half Cell Potential Tests
    • 4. Resistivity Tests
    • 5. Corrosion Rate Assessment
    • 6. Carbonation Test
    • Repair Quality Assessment
    • 1. Bond Test
    • 2. Anchor / Rebar Pull-out Strength
    • 3. Chemical Tests
    •  
      METALLURGICAL TESTING SERVICES
    • Metal Testing(chemical Analysis-wet)
    • Spectro Analysis(Metal Testing- Spectro)
    • Ores Testing
    • Ferro Alloy Testing
    • Minerals Testing
    • Minerals and Ores Testing
    • Mechanical Testings
    • Impact Testing
    • Hardness Testing
    • Microstructure
    • PMI Testing
    • Coating Thickness Testing
    • Salt Spray Testing
    • corrosion Testing
    • Intergranular Corrosion Testing
    • Stress Rupture Testing
    • Fatigue & Fracture Toughness
    • welder Qualification Testing
    • Welding Electrode Qualification
    • EQT Services
    • Electrical Testing
    • Failure Analysis
    • Surface Coating Test
    • XRF Testing
    • In-situ Metallography
    • Heat Exchanger Tube Inspection
    • RLA Testing
    • Borescope Testing
    • Borescope Inspection Services
    • Replica Testing
    • SEM -EDS Analysis
    • Metallurgical Testing
    • Microstructure Defect Analysis Testing
    • Microstructure Heat Treatment Analysis Testing
    • Electrical Conductivity Testing
    • Thermal Conductivity Testing
    • Compression Testing
    • Bending Testing
    • Flexural Strength Testing
    • Formability Testing
    • Micro-Cleanliness Testing
    • Salt Spray Corrosion Testing
    • Plating Thickness Testing
    • Density. Porosity Testing
    • Stress Corrosion Cracking (SCC) Testing
    • Environmental Stress Cracking (ESC) Testing
    • Toughness Testing
    • Melting Temperature Testing
    • Dezincification. Coating Thickness by XRF Testing
    • SEM Testing
    • Cross Section Testing
    • Fractography Testing
    • Surface Analysis Testing
    • Ductility Testing
    • Reflectivity Testing
    • Microstructure Testing
    • Mechanical Properties Testing
    • Machining Evaluation Testing
    • Plating Evaluation Testing
    • Impurity Inclusions Testing
    • Tensile Testing
    • Optical Emission Spectrography (OES) Testing
    • Inductively Coupled Plasma (ICP) Testing
    • Photomicrographic examination Testing
    • Scanning Electron Microscopy Testing
    • Specimen Preparation Testing
    • Non-Destructive NDT Testing Testing
    • Ultrasonic Testing
    • Hydrostatic Pressure Testing
    • Bearing Strength Testing
    • Magnetic Particle Testing
    • Liquid Penetration Testing
    • X-Ray Inspection Testing
    • Visual Inspection Testing
    • Wear Resistance Testing
    • Weld Failure Testing
    • Plating Defects Testing
    • Coating Defects Testing
    • Microstructural Defects Testing
    • Contaminant Investigations Testing
    • Reverse Engineering Testing
    • Ultrasonic Inspection (UT) Testing
    • Magnetic Particle Inspection (MT) Testing
    • Liquid Penetrant Inspection (PT). Weld Integrity Testing
    • Weld Failure Testing
    • Heat Affected Zone (HAZ) micro-hardness Testing
    • Chemical Analysis Testing
    • Glow Discharge Spectroscopy (GDS - Bulk Analysis) Testing
    • Energy Dispersive Spectroscopy (EDS - Micro Analysis) Testing
    •  
      MATERIAL TESTING SERVICES
       
    • Automotive Part Testing lab
    • Automotive Chemical Testing lab
    • Automotive Material Testing lab
    • Corrosion Testing lab
    • Life Cycle Testing lab
    • Mechanical Testing lab
    • Performance Testing lab
    • Salt Spray Testing Lab
    • Surface Analysis
    • Vibration Testing lab
    • Building Material Testing lab
    • Aggregate Testing lab
    • Brick Testing lab
    • Building Material Testing lab
    • Cement Testing lab
    • Concrete Testing lab
    • Marble / Granite Testing
    • Paint and Coating Testing
    • Refractory Testing
    • Soil Testing
    • Steel Testing
    • Wood Testing
    • Chemicals Testing
    • REACH Testing Services
    • Coal Testing
    • Consumer Products
    • Disposable Diaper Testing
    • Female Condoms Testing
    • Male Condoms Testing
    • Sanitary Napkin Testing
    • Electronics/Electrical Testing
    • EMI Testing and EMC Testing
    • Environmental Testing
    • Ferrous & Non Ferrous Metals Testing
    • Corrosion Testing
    • Ferrous & Non Ferrous Metal Testing
    • Food Testing
    • Food Testing FSSAI Notified Laboratory
    • Food/Agri Testing
    • Processed Food Nutrition Value Testing
    • Residue Analysis
    • Micro Biological Testing
    • Non Destructive Testing
    • Non Destructive Testing
    • Rebound Hammer Test
    • Ultrasonic Testing Of Concrete
    • Oil & Petroleum Testing
    • Diesel Testing
    • Oil & Petroleum Testing
    • Polymers Testing
    • Rubbers Testing
    • Transformer Oil Testing
    • Paper & Pacakging Testing lab
    • Pesticides Testing lab
    • RoHS Compliance Testing lab
    • Swimming Pool Water Testing Laboratory lab
    • Textile Testing lab
    • Thermal Conductivity Testing lab
    • Toy Testing lab
    • Water Testing lab
    • Dialysis Water Testing lab
    • Drinking Water Testing lab
    • Swimming Pool Water Testinglab
    • Waste/Processed Water Testinglab
    •  
      NDT TESTING SERVICES (NON DESTRUCTIVE TESTING SERVICES)
       
    • Non Destructive Testing
    • Ndt Services
    • Ultrasonic Testing
    • Magnetic Particle Testing
    • Dye Penetrant Testing
    • Radiographic Testing
    • Eddy Current Testing
    • Vibration Analysis
    • PAUT - TOFT
    • Ultrasonic Thickness Gauging Testing
    • Helium leak detection Services
    • RFET / NFET / PECT Testing
    • Internal Rotary Inspection system (IRIS)
    • Acoustic Pulse Reflectometry (APR)
    • Positive Material Identification Testing
    • Magnetic flux leakage (MFL)
    • Acoustic emission Testing
    • Flouresent Leak Detection
    • Long range ultrasonic testing - LRUT
    • Thermography Inspection Services
    • Leak Testing
    • TKY Joints Ultrasonic Testing
    • AWS D1.1 Structural steel ultrasonic Testing
    • Ultrasonic Testing
    • Radiographic Testing
    • Magnetic Particle
    • Penetrant Testing
    • Eddy Current Testing
    • Visual Testing
    • Ultrasonic Thickness Measurement
    • Vibration Analysis
    • Time of Flight Diffraction (TOFD)
    • Phased Array Ultrasonic Testing (PAUT)

     
    NDT CAPABILITIES FOR MECHANICAL AND CIVIL
    • Ultrasonic Inspection
    • Time of Flight Diffraction (TOFD) and Phased Array UT
    • Magnetic Particle Testing
    • Dye Penetrant Testing
    • Radiographic Testing
    • Eddy Current Testing
    • Weld ability Study
    • Visual Inspection and Field Services

     
    Water Seepage Investigation
     
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    ndt civil testing lab in cameroon list
     
    civil ndt - concrete testing lab in cameroon , ultrasonic pulse velocity testing lab in cameroon , rebound hammer testing lab in cameroon , rebar locator lab in cameroon , depth of concrete lab in cameroon , half cell potential testing lab in cameroon , carbonation testing lab in cameroon , pile integrity testing lab in cameroon , visual inspection and field lab in cameroon , in-situ compressive strength testing lab in cameroon , civil design strength lab in cameroon , civil existing structures lab in cameroon , construction materials testing lab in cameroon , pile testing systems lab in cameroon , structural monitoring systems lab in cameroon , asphalt testing systems lab in cameroon , pavement testing lab in cameroon , rock and soil laboratory test systems lab in cameroon , non-destructive tests for concrete lab in cameroon , geotechnical & vibration monitoring systems lab in cameroon , pavement condition monitoring lab in cameroon , concrete and cement lab systems lab in cameroon , civil lab testing concrete and concreting material analysis , civil laboratory testing lab in cameroon , construction material testing lab in cameroon , cement testing lab in cameroon , aggregate testing lab in cameroon , bricks testing lab in cameroon , blocks testing lab in cameroon , tension test on rebars testing lab in cameroon , chemical test on rebars testing lab in cameroon , water analysis lab in cameroon , cube test lab in cameroon , accelerated cube test (act) lab in cameroon , rapid chloride test (rcpt) lab in cameroon , concrete mix design lab in cameroon , fly ash lab in cameroon , slag and silica fume lab in cameroon , self compacting concrete lab in cameroon , temperature controlled concrete lab in cameroon , civil ndt and concrete testing lab in cameroon , civil ndt investigation lab in cameroon , concrete investigation lab in cameroon , coating thickness measurement on concrete structures lab in cameroon , compressive strength testing lab in cameroon , concrete mix design lab in cameroon , bitumen mix design lab in cameroon , core extraction testing lab in cameroon , core sampling testing lab in cameroon , concrete core testing lab in cameroon , concrete cube testing lab in cameroon , chemical analysis lab in cameroon , electrical resistivity testing lab in cameroon , ground penetrating radar survey lab in cameroon , sieve analysis lab in cameroon , ultrasonic low frequency testing lab in cameroon , upv testing lab in cameroon , vibration analysis of building lab in cameroon , leak testing lab in cameroon , ct scan on conctete lab in cameroon , element analysis on concrete lab in cameroon , impact echo testing lab in cameroon , linear polarization testing lab in cameroon , load testing lab in cameroon , permeability testing lab in cameroon , petrography of concrete lab in cameroon , pullout testing lab in cameroon , cut and pullout testing (cpo test) lab in cameroon , impulse response test lab in cameroon , impact echo test lab in cameroon , ground penetrating radar (gpr) lab in cameroon , crack depth measurement lab in cameroon , reinforcement location and corrosion assessments lab in cameroon , reinforcement location by ground penetrating radar (gpr) lab in cameroon , cover assessment lab in cameroon , half cell potential tests lab in cameroon , resistivity tests lab in cameroon , corrosion rate assessment lab in cameroon , carbonation test lab in cameroon , repair quality assessment lab in cameroon , bond test lab in cameroon , anchor rebar pull out strength lab in cameroon , chemical testing lab in cameroon ...
     
    list of our services following cities
     
    Afghanistan | Africa | Albania | Algeria | Americas | Andorra | Angola | Anguilla | Antigua and Barbuda | Argentina | Armenia | Aruba | Asia | Australia | Australia and New Zealand | Austria | Azerbaijan | Bahamas | Bahrain | Bangladesh | Barbados | Belarus | Belgium | Belize | Benin | Bermuda | Bhutan | Bolivia (Plurinational State of) | Bosnia and Herzegovina | Botswana | Brazil | British Virgin Islands | Brunei Darussalam | Bulgaria | Burkina Faso | Burundi | Cabo Verde | Cambodia | Cameroon | Canada | Caribbean | Cayman Islands | Central African Republic | Central America | Central Asia | Chad | Chile | China, Hong Kong SAR | China, Macao Special Administrative Region | China, People's Republic of | Colombia | Comoros | Congo | Cook Islands | Costa Rica | Côte d'Ivoire | Croatia | Cuba | Curaçao | Cyprus | Czechia | Democratic People's Republic of Korea | Democratic Republic of the Congo | Denmark | Djibouti | Dominica | Dominican Republic | Eastern Africa | Eastern Asia | Eastern Europe | Ecuador | Egypt | El Salvador | Equatorial Guinea | Eritrea | Estonia | Ethiopia | Europe | Fiji | Finland | Former Czechoslovakia | Former Ethiopia | Former Netherlands Antilles | Former Sudan | Former USSR | Former Yugoslavia | France | French Polynesia | Gabon | Gambia | Georgia | Germany | Ghana | Greece | Greenland | Grenada | Guatemala | Guinea | Guinea-Bissau | Guyana | Haiti | Honduras | Hungary | Iceland | India | Indonesia | Iran, Islamic Republic of | Iraq | Ireland | Israel | Italy | Jamaica | Japan | Jordan | Kazakhstan | Kenya | Kingdom of Eswatini | Kiribati | Kosovo | Kuwait | Kyrgyzstan | Lao People's Democratic Republic | Latin America and the Caribbean | Latvia | Lebanon | Lesotho | Liberia | Libya | Liechtenstein | Lithuania | Luxembourg | Madagascar | Malawi | Malaysia | Maldives | Mali | Malta | Marshall Islands | Mauritania | Mauritius | Melanesia | Mexico | Micronesia | Micronesia (Federated States of) | Middle Africa | Monaco | Mongolia | Montenegro | Montserrat | Morocco | Mozambique | Myanmar | Namibia | Nauru | Nepal | Netherlands | New Caledonia | New Zealand | Nicaragua | Niger | Nigeria | Northern Africa | Northern America | Northern Europe | Norway | Oceania | Oman | Pakistan | Palau | Panama | Papua New Guinea | Paraguay | Peru | Philippines | Poland | Polynesia | Portugal | Puerto Rico | Qatar | Republic of Korea | Republic of Moldova | Republic of North Macedonia | Romania | Russian Federation | Rwanda | Saint Kitts and Nevis | Saint Lucia | Saint Vincent and the Grenadines | Samoa | San Marino | Sao Tome and Principe | Saudi Arabia | Senegal | Serbia | Seychelles | Sierra Leone | Singapore | Sint Maarten (Dutch part) | Slovakia | Slovenia | Solomon Islands | Somalia | South Africa | South America | South Sudan | South-Eastern Asia | Southern Africa | Southern Asia | Southern Europe | Spain | Sri Lanka | State of Palestine | Sub-Saharan Africa | Sudan | Suriname | Sweden | Switzerland | Syrian Arab Republic | Tajikistan | Thailand | Timor-Leste | Togo | Tonga | Trinidad and Tobago | Tunisia | Turkey | Turkmenistan | Turks and Caicos Islands | Tuvalu | Uganda | Ukraine | United Arab Emirates | United Kingdom of Great Britain and Northern Ireland | United Republic of Tanzania: Mainland | United Republic of Tanzania: Zanzibar | United States | Uruguay | Uzbekistan | Vanuatu | Venezuela (Bolivarian Republic of) | Viet Nam | Western Africa | Western Asia | Western Europe | World | Yemen | Yemen: Former Democratic Yemen | Yemen: Former Yemen Arab Republic | Zambia | Zimbabwe ...
     
    list of our services following city
     
    Douala | Yaoundé | Garoua | Kousséri | Bamenda | Maroua | Bafoussam | Mokolo | Ngaoundéré | Bertoua | Edéa | Loum | Kumba | Nkongsamba | Mbouda | Dschang | Foumban | Ébolowa | Guider | Foumbot | Bafang | Yagoua | Mbalmayo | Meïganga | Bali | Limbe | Bafia | Wum | Bangangté | Tiko | Kribi | Mora | Sangmélima | Kumbo | Nkoteng | Mutengene | Buea | Garoua Boulaï | Batouri | Fundong | Fontem | Mbanga | Banyo | Manjo | Melong | Tibati | Muyuka | Obala | Nanga Eboko | Penja | Mbandjok | Kaélé | Bamusso | Lagdo | Tcholliré | Bélabo | Lolodorf | Eséka | Mamfe | Dizangué | Akonolinga | Bogo | Tonga | Abong Mbang | Yokadouma | Bazou | Mundemba | Bétaré Oya | Rey Bouba | Pitoa | Mindif | Babanki | Mbengwi | Akom II | Batibo | Belo | Dimako | Ambam | Njinikom | Ndikiniméki | Bonabéri | Kontcha | Yabassi | Bansoa | Ngou | Makary | Bekondo | Bandjoun | Bélel | Bamendjou | Ngambé | Ntui | Mme-Bafumen | Saa | Poli | Bankim | Bana | Doumé | Nguti | Ndom | Okola | Yoko | Jakiri | Ndelele | Minta | Djohong | Dibombari | Tignère | Ngomedzap | Akono | Essé | Koza | Okoa | Mbankomo | Ngoro | Diang | Somié | Mvangué | Ombésa | Mouanko | Évodoula | Mbang ...
     
    list of our services following urban Areas
     
    Djang | Foumban | Buea | Ebolowa | Dschang | Guider | Foumbot | Bafang | Yagoua | Mbalmayo | Meiganga | Limbe | Bandjoun | Bafia | Wum | Bangangte | Tiko | Mora | Kribi | Sangmelima | Kumbo | Nkoteng | Mutengene | Garoua Boulai | Batouri | Fundong | Fontem | Banyo | Manjo | Melong | Tibati | Muyuka | Obala | Nanga Eboko | Kaele | Lagdo | Tchollire | Belabo | Lolodorf | Eseka | Mbandjock | Mamfe | Bafut | Idenau | Akonolinga | Bogo | Abong Mbang | Yokadouma | Betare Oya | Rey Bouba | Monatele | Mindif | Mfou | Dimako | Mbengwi | Akom | Ambam | Njinikom | Bonaberi | Yabassi | Mme | Bana | Poli | Saa | Doume | Dibombari | Tignere | Mvangue | Ombessa ...