Water Damage and Mold Restoration

Tools in this group

• Psychrometric Calculator - Dew point, GPP, vapor pressure from temperature and RH.
• Drying Goal - Target indoor GPP based on outdoor conditions.
• Dehumidifier Sizing - Required pints per day by AHAM and field methods.
• Air Mover Placement - Number and CFM coverage by water class.
• Water Loss Class and Category - Plain-English categories 1, 2, 3 and classes 1 to 4.
• Material Drying Times - Typical drying times by material and contamination.
• Mold Growth Conditions - Risk by temperature, RH, and time.
• PPE Selection - Typical PPE by water category and contamination type.
• Mold Remediation Scope by Area - EPA / NYC DOHMH remediation level, containment, PPE tier, and clearance from affected square footage.
• IICRC S520 Condition Reference - The three S520 Conditions (normal ecology, settled spores, actual growth) in plain English.
• Antimicrobial Mix and Coverage - Concentrate and water split, per-tank dose, and tank fills from area, label coverage, and dilution (oz/gal or 1:N).
• Air Sample Run Time and Volume - Spore-trap run time, total sampled volume, and total pump time from calibrated flow and target volume.
• Dry Standard vs Affected Reading - Delta above the unaffected dry standard, a dry/wet verdict, and points still to remove from moisture-meter readings.
• Flood-Cut Demolition Take-Off - Drywall area removed, 4x8 sheet count, baseboard linear feet, and batt-insulation area from wall run and cut height.
• Standing Water Volume - Gallons, ft^3, and weight from affected area and depth.
• Negative Air Machine Sizing - Required CFM and unit count from room volume and target ACH.
• HEPA Scrubber Filter Life - Estimated filter days from CFM, runtime, and particulate category.
• Thermal Imager Delta-T Reference - Typical surface-temperature differentials for moisture, insulation, and electrical hotspots.
• Containment Air Balance - Required net negative CFM via Q = 2610 * A * sqrt(delta_P) and recommended NAM count.
• Drying Chamber Air Turnover - Actual ACH from air-mover and dehu CFM and gap to target ACH.
• Drying Log (IICRC S500 Boundary Test) - Multi-row drying log: ambient / chamber paired daily readings, per-day boundary-humidity pass (chamber GPP must trend below ambient GPP), chamber GPP trend slope (GPP/day), and dry-down completion estimate. Up to 14 readings. Per IICRC S500-2021.
• Equipment Power Draw vs Circuit Capacity - Total continuous amperage from LGR dehumidifier / air-mover / HEPA-scrubber / heat-dryer counts (representative nameplate defaults), the NEC 210.20(A) 80%-continuous limit per breaker, and the number of 15 / 20 / 30 A circuits required, flagging any single unit too large for its own circuit. Per NEC 2023.
• Drying-Chamber Fresh-Air / CO2 Buildup - Required fresh-air exchange (cfm) and air changes per hour to hold a target CO2, from a mass balance against the outdoor concentration. Per ASHRAE 62.1; complements chamber-turnover. IICRC S500 governs the drying plan.
• Moisture Removed by Grain Depression - Water-removal rate (lb/hr, pints/hr) and total water over the run from a dehumidifier's measured inlet/outlet grain depression and process airflow - an in-situ performance check.
• Evaporation Load / Dehu Demand - Estimated initial water load (gal and lb), first-24-hour removal target, and suggested AHAM dehumidifier pints from affected area, water class, and editable per-class load factors.
• Asbestos / Lead Abatement Containment Take-Off - Containment poly sheeting, the negative-air machine count for the required air changes, and the regulated-waste bag count from the room dimensions.
• Equilibrium Moisture Content of Wood - The moisture content wood drifts toward at a given air temperature and relative humidity, from the USDA Forest Products Lab (Hailwood-Horrobin) sorption equation - the reference a restoration drying setup moves a material toward. The exact value varies by species; the IICRC S500 dry standard and the dry, unaffected reference reading govern when a material is 'dry.'
• Wicking-Height Flood Cut and Demolition Takeoff - Turns a measured wall run and the flood-cut line into the demolition takeoff a tech writes on the wall before the saw comes out: linear feet of score cut, square feet of board removed, replacement 4x8 sheet count, cavity insulation area, and baseboard run. The moisture meter sets the cut line a few inches above the highest reading, per IICRC S500 practice (by name); these are the resulting quantities.
• Trapped Ceiling-Cavity Water Load and Collapse Screen - The distributed load (a foot of water is 62.4 psf), total weight, and volume of water trapped overhead in a sagging ceiling cavity, with a drain-before-entry screen. The threshold is an editable screen value, not a code capacity - the fastening, span, and a structural engineer govern; this decides whether to punch-drain from a safe distance before anyone works beneath the bulge.
• Field-Effective Dehumidifier Capacity at Chamber Grain Depression - Derates a nameplate AHAM pint rating to its field output as the chamber dries and the inlet grains fall, and turns the derate into the honest unit count - which goes UP, not down, as the chamber dries (the classic drying plateau). The operator reads the derate factor off the unit's own performance curve at the measured chamber GPP; the curve and psychrometric reality govern.
• S500 Class-of-Loss Screen by Wetted-Surface Fraction - Turns the wetted-surface field read (how much of the floor and wall is wet, how high it wicked, whether low-evaporation assemblies are wet) into a candidate IICRC S500 Class of water intrusion and the matching per-class evaporation factor that feeds the load tiles. A deterministic screen that proposes a Class and states the rationale; the inspector's classification and a moisture map govern.
• Desiccant Process-Airflow Sizing for Deep and Low-Temperature Drying - Sizes a desiccant dehumidifier by the process airflow needed to carry a target water-removal rate across the wheel at the deep grain depression it can hold - the deep / low-temperature and specialty Class 4 drying path the refrigerant sizing never covers, from the same psychrometric mass balance grains-removed uses in reverse. The manufacturer's performance map governs the achievable depression; reactivation air must be ducted outside.
• Drying-System Balance (Installed Dehu vs Evaporation Load) - Checks whether the installed dehumidification keeps up with the estimated evaporation load: the balance in pints/day, the capacity-to-load ratio against a target margin, and a balanced / no-margin / deficit verdict with the capacity to add. Closes the loop between evaporation-load and dehumidifier. Field capacity falls below the AHAM nameplate as the air dries; the restorer's daily monitoring and IICRC S500 govern.
• Bound Water in Wet Materials - Estimates the weight (lb) and volume (gal) of water held in affected materials that drying must evaporate, from the material volume, oven-dry density, and the moisture-content drop to the dry goal. Scopes equipment-days and validates the plan against the evaporation and dehumidifier sizing. Moisture content is dry-weight basis; meter readings and IICRC S500 govern.
• Disinfectant / Antimicrobial Contact (Dwell) Time Reference - Returns the label-typical wet contact (dwell) time for common EPA-registered antimicrobial classes (quat, accelerated hydrogen peroxide, bleach solution, phenolic, botanical/thymol) and the keep-wet and pre-clean rules that decide whether a disinfection claim is actually achieved. Antimicrobials are EPA-registered pesticides whose label is the legal authority (FIFRA); the ranges are guidance and S500/S520 govern.
• Carpet / Cushion Restore-vs-Replace Decision (IICRC S500) - Maps water category, the affected component (carpet vs cushion), and delamination to the IICRC S500 restore-vs-replace decision with its rationale. Delaminated carpet is replaced; saturated cushion in any category is typically removed; Category 3 porous flooring is generally removed and disposed. A professional determination case by case; the restorer's judgment, customer agreement, and S500 govern.
• Water Category Deterioration Over Time (IICRC S500) - Applies the S500 principle that water category is determined at the time of remediation, not by the source alone: origin category, elapsed wet time, a warm-environment flag, and contaminant contact return the likely current category. A clean loss left standing or warm reclassifies upward; contaminant contact escalates toward Category 3. When in doubt the higher category is assumed; the restorer and S500 govern.
• Hydroxyl Generator Sizing by Volume (IICRC S700) - Sizes occupied-space hydroxyl deodorization by structure volume against a per-unit coverage rating: the generator count and the continuous run-time expectation. The occupied-safe counterpart to ozone shock and thermal fogging - hydroxyl radicals oxidize odor at safe occupied levels but work more slowly. Coverage and run times are manufacturer-specific; remove the source and clean first; the manufacturer and IICRC S700 govern.
• Injection / Wall-Cavity Drying System Sizing - Sizes an injection / wall-cavity drying system: the stud-bay count from the wall length and stud spacing, the injection port count, and the number of air-delivery systems - the minimally invasive alternative to a flood cut for drying enclosed assemblies in place. Port count and ports per system are manufacturer-specific; respect cavity contamination and pressure direction; the restorer and IICRC S500 govern.
• Drying Completion Projection (Days to Goal) - Projects how many days a material needs to reach its dry goal from the moisture-content drop observed between readings: the remaining points to goal and a constant-rate days-to-goal estimate, or a not-progressing flag when the daily drop stalls. Turns the drying log into a schedule. Drying is non-linear and slows near the goal; the drying-log readings and IICRC S500 govern the real pull date.
• Drying-Equipment Sensible Heat Load and Ventilation - Turns the air movers, dehumidifiers, and scrubbers running in a drying chamber into the sensible heat they dump (3.412 BTU/hr per watt) and the ventilation needed to hold a target temperature rise (the 1.08 sensible relation): the heat load, the makeup cfm to cap the rise, and the rise an entered exhaust airflow actually delivers. An overheated chamber leaves the efficient-evaporation band. Envelope losses and the building HVAC govern; this is a screen. IICRC S500 names the band.
• Fire-Exposed Wood Char Depth and Residual Capacity - Screens whether a charred wood beam or post kept enough sound section to carry load after a fire: the AWC/NDS one-dimensional char depth (about 1.5 in/hr) plus the heat-degraded zero-strength layer, the residual cross-section, and the bending-capacity (section-modulus) fraction that drives the keep-or-replace call. Heavy timber survives fire because the residual section is large. Screens the bending section only; a structural engineer governs connections, splitting, and the load path.
• Dry-Sponge Soot Cleaning Takeoff and Seal Coat - Turns soot-affected wall and ceiling area into the chemical sponges, labor hours, and odor-seal primer the dry-smoke cleaning phase consumes: sponges from a per-sponge coverage, labor from a production rate, and primer gallons from a coverage rate. The residue type governs the method, so dry sponging is for dry smoke; protein, wet, and fuel-oil residues need wet cleaning. A quantity screen for a fire estimate, not a cleaning protocol. IICRC S700 governs.
• Ozone Deodorization Sizing, Time, and Lockout - Sizes an ozone shock-deodorization for smoke odor in an unoccupied structure by treatable volume against each unit's rated volume, with the safety lockout front and center: the generators needed, the shock duration, and the unoccupied-sealed-aerate sequence. Ozone is a strong oxidizer and respiratory toxin; the space must be sealed and aired below the 0.1 ppm OSHA limit before reentry, and a hydroxyl generator is the occupied-space alternative. Sizes equipment; not authority to run ozone occupied.
• Smoke Residue Type and Cleaning Method Screen - Maps an observed smoke residue (dry, wet, protein, fuel-oil/puffback, or synthetic) to its cleaning method, the decision every fire job turns on before a sponge or solvent is chosen: the residue source, appearance, recommended method, deodorization note, and the trap to avoid (protein looks invisible but must not be dry-sponged). A test-clean of an inconspicuous area governs the final method; this screen narrows it. IICRC S700 governs.
• Thermal/ULV Fog Deodorizer Dosage - Sizes the deodorant a thermal or ULV fogging pass consumes, dosed by structure volume against a label rate in ounces per 1,000 cubic feet across one or more passes: the ounces to mix and the gallons. Fogging penetrates the porous paths the smoke took, the counterpart to ozone shock. The label rate and dwell govern; a thermal fogger produces a hot fog from an open flame, so the space is unoccupied and a fire watch applies. Sizes quantity only. IICRC S700 governs.
• Contents Pack-Out Volume, Boxes, and Storage - Turns an affected room's contents into the boxes, climate storage, and truck loads a pack-out requires: the contents volume from a density per floor area, the box count, the storage volume with a warehouse stacking allowance, and the truck loads. Serious fire and water losses begin with a pack-out so the structure can be cleaned and dried. The actual inventory and box mix govern; the densities are starting rules of thumb. An estimating screen.
• Surface Condensation Risk and Dew-Point Margin - The failure mode a psychrometric read never screens: warm, humid drying air meeting a cold single-pane window, uninsulated wall, or slab edge and condensing there - secondary water in the worst place for mold. Computes the Magnus dew point from the chamber air temperature and RH, compares it to the coldest surface (IR-read), and flags whether the surface sits at or below the dew point and by what margin. Lower the humidity or warm the surface to clear the risk. A screen; the IR-read surface temperature governs (ANSI/IICRC S500).
• Indoor/Outdoor Spore Ratio Clearance Screen - The everyday mold clearance read: post-remediation indoor airborne spore concentration should sit at or below the outdoor control (ratio at or under 1), with no indoor-dominant water-damage marker genera (Stachybotrys, Chaetomium) elevated inside. Computes the indoor/outdoor ratio and screens the marker flag. A screen, not a clearance certificate; an independent environmental professional interprets the genera and the full criteria (ANSI/IICRC S520).
• Hardwood Floor Drying-Mat System Sizing - Sizes the Class 4 specialty mat system that saves a wet wood floor without tearing it out: panels laid on the floor and pulled by a suction unit that draws moisture up through the boards. Gives the mats needed from the floor area and per-mat coverage, and the suction units to drive them. The mat-system manufacturer's coverage and unit ratings govern; subfloor construction and finish affect feasibility (ANSI/IICRC S500 Class 4 specialty drying).
• Mold Surface Remediation Labor and HEPA Vacuuming - The labor cost driver between the scope tier and the chemistry: the hours to physically clean remediated surfaces. S520 source removal is a multi-pass operation (HEPA vacuum, damp wipe, HEPA vacuum again) at a production rate the substrate and access set. Gives the labor-hours from area, passes, and production rate, and the crew calendar time. The Condition, substrate, and access govern the rate; non-cleanable porous materials are removed, not cleaned (ANSI/IICRC S520).