Water Damage Restoration Procedures PDF

The most critical course of action in restoration during is to as soon as possible An begin ✓ respond quickly & mitigation All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC ✓ s500 To help protect techni...

The most critical course of action in restoration during is to as soon as possible An begin ✓ respond quickly & mitigation All restorers should follow the standard of care for the water restoration profession developed by the restoration industry entitled the IICRC ✓ s500 To help protect technicians from the many hazards associated with contaminated water losses restorers need to have ready access to several items. These items protect for all to the body. ✓ potential exposures Respiratory protection regulations state that the employer must provide ✓ medical evaluations 2. fit testing 3. training The contract clearly states the agreement between the building owner and the restoration contractor. The form specifies who is responsible for payment and should be signed work begins ✓ before The technicians first responsibility when arriving at a water damage site is to identify communicate and eliminate if reasonably possible ✓ safety hazards Federal regulations apply to handling or disturbing of based paint and asbestos ✓ lead After safety concerns have been addressed and the initial water source has been stopped, the restorer must complete an evaluation of the water’s migration through the structure. During this process, the restorer inspects all areas. ✓ potentially affected The ultimate goal is to find the edge of water migration which moves in a three dimensional path throughout the structure. This is accomplished across carpeted surfaces using a _ and across most hard surfaces using a moisture meter. (non-penetrating) ✓ moisture sensor, non-invasive water from a clean source with no substantial risk of causing sickness or discomfort is said to be ✓ category 1 water that has significant degree of chemical biological and or physical contamination and potential to cause sickness or discomfort is ✓ category 2 cleaning procedures must be employed before the drying of a category 2 water loss can continue. at a minimum affected. must be removed and disposed of and carpet must be throughly cleaned using a hot water extraction method. ✓ carpet underlay When water intrusion results from a grossly unsanitary source or carries (disease causing) agents, it is said to be Category 3. ✓ pathogenic worker and occupant and safety are the 1st priority on every sewage loss. areas affected by category 3 water intrusion are marked and posted as potentially hazardous. ✓ health Various cleaning and decontamination procedures must be used on Category 3 water losses, including the removal of all intrusion. materials affected by the water ✔ highly porous when resistance is encountered and performing proper services in a category 3 water loss becomes a challenge restorers. Immediately to prevent liability and address the conflict. ✔ stop work Third party experts are commonly referred to as Indoor Environmental Professionals, or ✓ IEP Losses where regulated or hazardous materials have contaminated the structure do not change the of water. ✓ category pre-existing conditions should be identified documented and communicated to all parties during the initial inspection. ✔ materially interested when carpet delimitation (the loss of integrity in the adhesives used to laminate the and backings) has occurred, further damage is very likely. for this reason when extensive carpet delimitation is discovered technicians must call it to the attention go all materially interested parties, document the condition and suggest replacement. ✓ primary and secondary there are number of causes for carpet delimitation many of them relates to restoration activities ✓ improper Many building materials will absorb excess water vapor and suffer damage, especially when air is allowed to remain above _% relative humidity. ✓ 60% Hygroscopic materials gain and lose moisture continually in an effort to with the water content in the surrounding air mass. The more hygroscopic the material, the faster it will collect water vapor, and the easier it will suffer damage. ✓ equalize and secondary When water intrusion results in water running through wall cavities, inspection access holes are used to ensure that blown-in insulation has not compacted and lost its Wet compressed insulation should be ✓ R-Value, removed the most effective way to speed the drying process is to remove as much of the water in a liquid state as possible during the phase (for example multiple extractions.) poor extractions will significant slow the drying process. ✓ extractions Abide by local and regulations when disposing extracted water. Waste water is best disposed of into a sanitary sewer. ✓ laws the primary goal of the initial extraction of the affected area is to contain further of the water within the structure. ✓ migration Whenever carpet must be disengaged from the tackless strip, a carpet awl must be used. and ✓ knee kicker the majority of cushion has a skin or mesh on the top side. the purpose of this skin is to ease during installation: it is not a vapor barrier ✓ carpet stretching If carpet is to be re-installed, technicians should avoid cutting carpet seams unless it is absolutely ✓ necessary how many gallons of water are presenting a basement that measures 30' x 25' where water is standing at a depth of 6'9" ✓ 30'x25'x6.75' (9"/12") = 5062.5 cuft x 7.48= 37,867.50 every cubic foot of standing water present in a structure contains liters) and each gallon (3.8 liters) of water wights 8.34pounds (3.8 kg) gallons (28.3 ✓ 7.48 there are 3 levels of biocidal activity, according to the environmental protection agency EPA(provide starting with weakest) ✓ sanitizer: cleaning treatment designed to reduce # of pathogenic microorganisms to a safe level. 2. disinfectant: designed to destroy or inactivate microorganisms but not necessarily their spores 3. Sterilizer: a product designed to destroy or eliminate all forms of microorganisms (fungi, bacteria, viruses) and their spores. whenever a chemical antimicrobial or biocide is used restorers must follow the label explicitly ✓ directions most antimicrobials require that the area of application be vacated by during application and or a period of time after application. and pets ✓ occupants The label is the law" get customer briefing before starting any antimicrobial / biocide treatment. ✓ Ensuring establishing is the best way to set restorative dying goals. A dry standard is established by obtaining a moisture reading using an material ✓ dry standard, unaffected the numerical value from a moisture meter can be documented and used to monitor progress, for this reason, the amount of moisture absorbed by semiporus structural materials is measured most accurately with a moisture not a moister sensor. ✓ meter because of their non-invasive nature and quick surveying capabilities, non-invasive meters are the most effective tools for locating abnormal moisture behind and beneath finishing materials such as and resilient floor coverings. ✓ ceramic tile, vinyl IICRC Water Restoration Technician Verified Questions and Answers latest Updates 2024 What document dictates the Standards for the Water Damage Restoration Industry? ✓ ANSI/IICRC S-500 Water Damage Standards What needs to be signed before restoration begins? Work authorization Why do we extract water from carpet multiple times? ✓ To reduce drying times After the water is extracted, what dictates the rate of drying? ✓ Evaporation What should we do if we find pre-existing damage? ✓ Take pictures, document, advise parties What tools are necessary to disengage the carpet? ✓ Knee kicker & awl What is delamination? ✓ Separation of the primary and secondary backing What can cause delamination? ✓ Improper handling and stretching What should we do if we discover significant Delamination on our project? ✓ Document and report Is it OK to cut carpet seems? ✓ Only as a last resort What is the purpose of the skin on carpet cushion? ✓ Ease of installation Before a technician can wear a respirator, what needs to be done? ✓ Medical evaluation and fit testing What is our first responsibility when arriving at any water loss? ✓ Safety Name two substances found in construction that are federally regulated ✓ Lead and asbestos For safety with what should all are drying equipment be equipped? ✓ Ground plug What should we do with equipment that has damaged electrical cords? ✓ Remove from service and replace the cords What is the most critical course of action when we get a water damage loss? ✓ Respond quickly What is the purpose of the initial extraction? ✓ To quickly contain moisture migration Can drywall be restored after it becomes wet? ✓ Yes What should we do with ceilings that are sagging and wet? ✓ Remove them Is vinyl wallpaper a vapor barrier? ✓ Yes How can we increase the rate of evaporation from wet drywall with vinyl wallpaper on it? ✓ Inter-air drying How should we address blown cellulosic insulation in wall cavities when it becomes wet? ✓ Remove it Why is plywood more restorable than particleboard? ✓ Less processing If you have water trapped between plywood and sheet vinyl, what should you do? ✓ Remove it Can we normally dry wet particleboard under sheet vinyl? ✓ No Drying materials require us to control which two things...? ✓ Evaporation and dehumidification Wet wood subflooring Under stone or tile drying strategy requires... ✓ Small amounts of airflow and warm air Can you use small amounts of airflow and warm air to dry concrete? ✓ Yes What happens to the VP in a material when we heat it? ✓ It increases When you increase vapor pressure by heating, what happens to material's potential for evaporation...? ✓ It increases What happens if the material is cooler than the dewpoint temperature? ✓ Condensation occurs, evaporation stops VP (vapor pressure) of material = high; VP of air = low. What will happen? ✓ Evaporation Will occur Describe water phase changes ✓ With the application of heat, ice turns to a liquid and (with more heat) liquid turns to a gas. The reversal happens with the removal of heat What does Hygroscopic mean? ✓ Vapor absorbing Describe some examples of secondary damage ✓ Microbial (mold) and bending or folding The secondary damage happened in Hygroscopic or non- Hygroscopic materials? ✓ Hygroscopic materials What is a balance drying system? ✓ When the rate of evaporation does not exceed the rate of dehumidification If you use the outdoor air in your dry process, is that an open or closed drying system? ✓ Open How do you know if you can use the outdoor air in your drying strategy? ✓ If it is warmer and dryer What does an air filtration device (AFD) do? ✓ Remove particulate from the air When can an AFD used? ✓ In category three water losses When should an indoor environmental professional "IEP" be used? ✓ When individuals are at risk or compromised The amount of water vapor mixed with a given volume of dry air is called ✓ Grains per pound (GPP) The pressure exerted by the water (vapor) molecules in the air on surrounding surfaces is called ✓ Vapor pressure When the air is at 100% Rh, it is also at its ✓ Saturation point When vapor passes through solid material this is the materials... ✓ Permeance What does it mean when we say, "nature always seeks an equilibrium?" ✓ Areas of high vapor pressure seeks areas of low vapor pressure Considering the following measurements, which is the highest humidity ratio (or dewpoint temperature or vapor pressure) 90F/30% OR 40F/40% OR 50 F/80% OR 70 F/70% ✓ 70 F/70% Considering the following measurements, which is the lowest humidity ratio (or dewpoint temperature or vapor pressure) 90F/30% OR 40F/40% OR 50 F/80% OR 70 F/70% ✓ 40 F/40% If the inside is "warm and wet" then what conditions would be necessary outside if we were to use the outdoor air to dry the structure? ✓ Warmer and dryer Category one water; 45°F in the house. How would you address the drain? ✓ Warm the structure up When water evaporates, does the surface become cooler or hotter? Why? ✓ Cooler because the molecules absorb energy What relative humidity (and above) can support microbial growth? ✓ 70% What should be indicated on that contract? ✓ terms of payment What three pieces of information on the right-hand side of the psychometric chart? Are they related to each other? ✓ GPP humidity ratio/dewpoint/vapor pressure. They are related to each other only in the way they moveInside of the house is 75°F and 60% relative humidity. How cold is the windows have to be in order to collect condensation? ✓ 60 If the humidity ratio is 45GPP at 80°F... What is the relative humidity? ✓ 29% At 70°F and 60% relative humidity... What temperature is required to bring relative humidity to 30%? ✓ 92 How do you determine cubic feet in a room? ✓ Length by width by height How many gallons are in a cubic foot of water? ✓ 7.48 How many gallons are in a basement that is 40' x 30' with a 4'3" water depth? ✓ 38,148 How many air movers are installed in each affected room to start? √1 Add one air mover for every "how many" square feet of floor (including 2 feet up walls)? ✓ 50 to 70 Add another air mover for every "how many" square feet for wet walls above 2 feet high? ✓ 100 to 150 Add another air mover for every "what" that is larger than 18 inches? ✓ Offset What tool do you use to remove moisture from the air? ✓ Dehumidifier How does a refrigerant dehumidifier collect water vapor? ✓ Through the process of condensation What temperature range do refrigerant dehumidifiers work best in? ✓ 70 to 90°F When is mechanical dehumidification necessary? ✓ AlwaysWhat are the residential performance environmental test conditions for refrigerant dehumidifiers? The test conditions is at 80° at 60% relative humidity for 24 hours 500 What measures to daily drying data include? ✓ Atmospheric temperature changes/humidity ratio changes (including mechanical devices)/material moisture changes/material temperature changes What can an LGR do that I conventional refrigerant cannot? ✓ Go down to 34GPP True or false: a refrigerant dehumidifier produces the lowest vapor pressure? False Which dehumidifier would work best on a crawlspace that is open to cold, outdoor air? ✓ Desiccant The IICRC formula requires three things to determine the initial D humidification needs... What are they? cubic feet, class, dehumidifier type How much initial pints of Dehumidification does the IICRC recommend for a class 2, LG dehumidifier at 25000 cubic feet? How much initial pints of Dehumidification does the IICRC recommend for a class 3, conventional dehumidifier at 10000 cubic feet? ✓ 333 How much initial CFM of Dehumidification does the IICRC recommend for a class 4, desiccant dehumidifier at 15000 cubic feet? ✓ 750 Where do we dispose of the water we collect on the water damage loss? ✓ Back into sanitary sewer What must be due before we apply biocide into a structure? Advise parties to gain permission What is a solution called when it reduces, but does not illuminate germs; produces a healthful condition? ✓ Sanitizer What is a solution called when it is used to produce a surface absent of life? ✓ SterilizerWhat must we follow every time we apply a government registered biocide? ✓ Label and directions Should we use air movers on moldy surfaces? ✓ No What should we do if we encounter mold on the job? ✓ Investigate further What should we do if there's a disagreement and what is restorable on a sewage damage loss? ✓ Stop work What PPE should a restorer where - at a minimum on a category 3 loss? ✓ Protective face mask, waterproof gloves, rubber boots What does classification refer to? ✓ Rate of evaporation What is a class 1 water loss? ✓ Less than 5% of the materials are affected What is a Class 2 water loss? ✓ Between 5 to 40% of materials are affected What is a Class 3 water loss? ✓ Over 40% of the materials are affected What is the class 4 water loss? ✓ Deeply held or bound (hard to dry) What is Category referring to? ✓ Level of contamination What is a Category 1 water loss? ✓ Does not pose substantial risk from exposure What is a Category 2 water loss? ✓ Potential to cause discomfort or sickness What is a category 3 water loss? ✓ Grossly contaminated and contains pathogenic agents What is a "special situation" water loss? ✓ When that contains lead or asbestos What is the carpet cushion always get replaced? ✓ Category 2 & Category 3 What should you wear on a category 3 loss? ✓ hard hat, eye protection, respiratory protection, gloves, appropriate gloves, knee pads, rubber boots Where should we expect when conducting our initial inspection? ✓ Everywhere What meter should we use on the initial inspection? ✓ Noninvasive What tools can we used to determine where the water has migrated in carpet and pad? ✓ Moisture sensor Do you use meters or sensors to determine if the material sufficiently dry? ✓ Meters What meter do we use to detect moisture under sheet vinyl flooring? ✓ Non invasive What else can a non-invasive moisture meter be used on? ✓ Vinyl & ceramic How do you know if a material is sufficiently dry? ✓ If you have reached your dry standard What meter do we use to measure temperature and humidity? ✓ Thermal hydrometer How often should we inspect restorative drying projects? ✓ Daily What is a hardwood floor that is water on the bottom and the top look like? ✓ Cupping When should you establish hardwood floor drying goals? ✓ At the start of the job How do you know if the hardwood floor is dry enough? ✓ When the cupping is gone & the hardwood is within 2-4% points of the substrate When can you refinish the hardwood floor? ✓ After acclimation What moisture content in wood can support "wood rot"? ✓ 20% moisture content and above A healthy relative humidity should not exceed ✓ 60% Acceptable range for an indoor relative humidity ✓ 30-50 2 hazardous material that may be present in older structures ✓ Lead and Asbestos Psychometry is the study of ✓ Air, humidity and temperature Suggested temp for dry bulb 70-85 degrees Below 70 can slows above As air temperature increases ✓ The air has more heat energy to suspend water vapor If the dry bulb temp goes up, the rh ✓ Goes down Relative humidity(RH) ✓ The amount of moisture in the air % Indoor RH should not exceed ✓ 60% If you reach 70% or high RH, this creates ✓ Saturation, dampness, mold Dewpoint temp ✓ Is the surface point Materials above the dewpoint ✓ Can be dried Materials below dewpoint ✓ Gets wet When does humidity become saturated? ✓ 100% RH How many degrees above dewpoint for drying? ✓ at least 20 degrees GPP ✓ The weight of the water vapor in the air Vaper pressure calculation ✓ Vp material - vp air vp differential Humidity Ratio is measured in ✓ GPP Humidity ratio is directly related to ✓ Dewpoint and vapor pressure Adhesive's losses what perfect of stretch when wet ✓ 89-85% Moisture sensor is only used to ✓ Determine the perimeter of water migration in carpet, underpayment and pads Thermal imaging ✓ detects temperature differences and may indicate where moisture is 2 types of moisture meter ✓ Invasive(pin) and non-invasive (scan) 2 types of invasive probes ✓ Insulated and non-insulated Penetrating measure meter measures ✓ temperature in liquids and semi-solid substances What can be don't you decrease drying time ✓ Air warmer and dryer and extraction What is humidity directly related to ✓ Dewpoint, vaper pressure What temperature will increase the rate of drying ✓ Above 70 What could happen to humidity was to exceed 70% ✓ Secondary damage and microorganisms' growth How many degrees above dewpoint for drying? ✔ at least 20 degrees GPP The weight of the water vapor in the air Vaper pressure calculation ✔ Vp material vp air vp differential Humidity Ratio is measured in ✓ GPP Humidity ratio is directly related to Dewpoint and vapor pressure Adhesive's losses what perfect of stretch when wet ✓ 89-85% Moisture sensor is only used to ✓ Determine the perimeter of water migration in carpet, underpayment and pads Thermal imaging ✔ detects temperature differences and may indicate where moisture is 2 types of moisture meter ✔Invasive(pin) and non-invasive (scan) 2 types of invasive probes ✔Insulated and non-insulated Penetrating measure meter measures ✔ temperature in liquids and semi-solid substances. What can be don't you decrease drying time. ✓ Air warmer and dryer and extraction What is humidity directly related to ✔ Dewpoint, vaper pressure What temperature will increase the rate of drying. ✓ Above 70 What could happen to humidity was to exceed 70% ✓ Secondary damage and microorganisms growth