Office parks, retail and restaurant frontage, medical buildings, hotels and HOA common areas in Roswell and along the GA-400 corridor
Thrare Contracting cleans exterior surfaces for commercial property owners, facilities managers and retail operators in Roswell: office parks along Holcomb Bridge Road, restaurant and retail frontage on Canton Street, medical office buildings, hotels and mixed-use assets near the GA-400 interchange, and homeowner association common areas. Roswell is a service area rather than a location. Rare Earth Ltd, doing business as Thrare Contracting, is based in Atlanta at the address printed at the foot of this page, and Rare Earth Ltd has operated since January 19, 2020.
Rare Earth Ltd holds DBE, ACDBE and MBE certification, qualifies as a small disadvantaged business, is registered in SAM under UEI Z4WKS4UE8NJ6 and CAGE 9JAV8, and uses E-Verify. Rare Earth Ltd does not hold HUBZone, 8(a) or SOC 2 status and does not represent otherwise. A buyer can verify each of those registrations without calling us.
A Roswell facilities manager buying exterior cleaning is working against three constraints at once, and most bids answer only the first.
A commercial exterior cleaning scope covers every surface a customer walks past, priced by surface type rather than as one flat building wash.
Exterior cleaning on an occupied property is sequenced zone by zone, so the only area out of service at any moment is the zone the crew is standing in.
A Roswell commercial cleaning quote is priced on five inputs, and the quote names all five so a manager can check the arithmetic against the next bid: square footage by surface type, access and reach, soil load, containment method, and visit frequency.
Thrare Contracting publishes no price per square foot here, because a published rate cannot see the access, the soil load or the containment method.
Wash water stays on the property. A storm drain in a Roswell parking lot is not connected to a treatment plant, and the rules governing what may enter it are federal, state and municipal at once.
The City of Roswell states the municipal rule plainly: "Illicit discharge is any discharge to a storm sewer that is not composed entirely of storm water" (City of Roswell, Environmental Public Works, Watershed Protection, read 2026-09-02). The same City page states that "The City of Roswell is part of the 15-County Metro North Georgia Planning District (MNGWPD)" and that "along with the Clean Water Act regulation for the NPDES Phase I Permit, the City is required to undertake certain activities each year to protect our streams."
The federal definition behind that page is 40 CFR 122.26(b)(2), which defines an illicit discharge as "any discharge to a municipal separate storm sewer that is not composed entirely of storm water except discharges pursuant to a NPDES permit (other than the NPDES permit for discharges from the municipal separate storm sewer) and discharges resulting from fire fighting activities" (read 2026-08-31). In Georgia the NPDES stormwater program is administered by the Environmental Protection Division's Watershed Protection Branch (Georgia EPD, Stormwater, read 2026-08-31).
Roswell has a specific reason to enforce that rule rather than recite it. The City reports that the Big Creek, Hog Waller Creek and Foe Killer Creek watersheds inside the city "are listed as not supporting their designated use", that the Rocky Creek and Willeo Creek watersheds "are partially supporting their designated use", and that those listings follow "elevated levels of bacteria specifically fecal coliform which may be caused by the influence of urban runoff and other bacteria sources" (City of Roswell, read 2026-09-02). A commercial parking lot on Holcomb Bridge Road drains into that system.
The City states the wash water principle in its own public guidance on washing: "be sure to wash your car in an area where water will not go directly into a storm drain and don't pour dirty wash water down the storm drain" (City of Roswell, read 2026-09-02). The City's guidance is written to residents about cars, and the physical principle behind that guidance does not change when the surface is a dumpster pad and the volume is larger.
Industry guidance says the same without being asked. The Brick Industry Association instructs cleaners to "Control and/or treat runoff in accordance with the requirements of the jurisdiction", and states that "Some jurisdictions may require containment and treatment of the runoff water before it can leave the site. Dilution of runoff and its release into the stormwater management system should not be expected or allowed unless expressly permitted by the applicable jurisdiction" (Brick Industry Association, Technical Notes 20, Cleaning Brickwork, August 2018, read 2026-09-02).
Containment on a Roswell commercial site is one of four methods, chosen at the walk: block the storm inlet and infiltrate across a vegetated area, berm the zone and vacuum recover to a holding tank, mat and filter before release, or haul the recovered water off site. Thrare Contracting names the method in the quote, because the method carries a cost and a bid that hides it is not cheaper.
The pressure that damages a surface is lower than the pressure most contractors arrive with, and the published limits are set by the material rather than by the equipment.
For brickwork the Brick Industry Association publishes four bands and a ceiling (Technical Notes 20, Cleaning Brickwork, August 2018, read 2026-09-02):
The association's summary instruction is blunter: "Do not use water pressures higher than 400 psi (2800 kPa) as measured at the nozzle tip unless permitted by brick manufacturer", using "a stainless steel 25 to 50 deg. fan tip" held at least 12 inches from the surface. The same document says what excessive pressure does, and that is the part an owner should read before accepting a low bid: it "may damage brick surfaces, erode mortar joints, and remove finishes or other surface coatings, resulting in a different appearance."
The Brick Industry Association also asks for a trial before the wall: "Perform trial cleaning on a 20 sq ft (2 m2) sample area and allow wall to dry before evaluating results." A test patch costs an hour, and a stripped mortar joint across an elevation costs a repointing contract.
Clay and concrete pavers are a different material with a different published range. The Concrete Masonry and Hardscapes Association states that for interlocking concrete pavement "A high pressure sprayer applies cleaner and water between 1,000 and 4,000 psi (6.9 and 27.6 MPa), and at a rate between 2 and 6 gallons/minute", and warns that "A low angle of attack from a wide nozzle spray will also reduce the risk of dislodging joint sand" (CMHA, PAV-TEC-005-22, read 2026-08-31). The CMHA figures are published for pavers, and the paver range is not a limit for brick, for poured concrete, or for cladding on a building elevation.
On a Roswell property that means an elevation is soft washed with chemistry at low pressure, a paver walkway takes higher pressure through a wide fan, and a dumpster pad takes the highest pressure on the site. One crew running one setting across all three is how a cleaning visit produces a repair invoice.
Exterior cleaning on an operating property happens outside business hours for the zones that touch the customer, and inside business hours for the zones that do not.
For food service the timing is written into the state rule the operator is inspected against. Georgia Administrative Code Rule 511-6-1-.07, subsection (5)(b)2, states: "Except for cleaning that is necessary due to a spill or other accident, cleaning shall be done during periods when the least amount of food is exposed, such as after closing" (Rules of the Georgia Department of Public Health, published by the Georgia Secretary of State, read 2026-09-02). Subsection (5)(b)1 states that "The physical facilities shall be cleaned as often as necessary to keep them clean and by methods that prevent contamination of food products."
The same rule explains why a dumpster pad is a compliance surface rather than a cosmetic one. Subsection (2)(q) states: "Outdoor refuse areas shall be constructed in accordance with Law and shall be curbed and graded to drain to collect and dispose of liquid waste that results from the refuse and from cleaning the area and waste receptacles." Subsection (2)(p) adds that "Exterior walking and driving surfaces shall be graded to drain." A Canton Street operator whose pad drains to the parking lot rather than to a collection point has a construction problem no cleaning schedule fixes, and the cleaning contractor should say so rather than wash around it.
Night work in Roswell is bounded by the city noise ordinance, which sits at City Code 5.1.13 and 8.8.3(s). The City states that the ordinance "prohibits sounds that exceed established decibel thresholds, particularly during nighttime hours", and that its exemptions cover "emergency work, public safety operations, permitted events, religious services, school-related performances, and daytime construction or landscaping" (City of Roswell, Community Development, Nuisances, read 2026-09-02). Daytime maintenance sits inside an exemption; a 2 a.m. hot water machine behind a building with apartments above it does not. Thrare Contracting reads the property's lease restrictions alongside the ordinance before quoting overnight work.
The washing interval is set by exposure and soil load rather than by the calendar, and one property carries three intervals at once.
Rain is the background load. The National Oceanic and Atmospheric Administration puts the twelve 1991 to 2020 monthly precipitation normals for Atlanta Hartsfield-Jackson International Airport station at a summed 50.43 inches, against the separately published annual normal of 49.71 inches for the same station (NOAA National Centers for Environmental Information, station USW00013874, read 2026-08-31). Rainfall at that normal keeps a north facing elevation damp long enough for organic growth, and rain moves parking lot sediment onto walkways faster than a dry climate would.
Thrare Contracting sets the interval per surface and writes it into a recurring program, and the photo record from each visit is what moves a surface between intervals.
Vendor approval on a Roswell commercial property is a document exercise, and vendor setup is the step that delays a first visit by two weeks more than any other.
Thrare Contracting is based in Atlanta and serves Roswell as a service area. Rare Earth Ltd, trading as Thrare Contracting, works across north Fulton County including Roswell, Alpharetta and Sandy Springs, and the company address is 8735 Dunwoody Pl, Ste R, Atlanta, GA 30350.
Wash water is contained on the property and kept out of the storm drain. The City of Roswell defines an illicit discharge as "any discharge to a storm sewer that is not composed entirely of storm water", and the City operates under a Clean Water Act NPDES Phase I permit. Containment is done by inlet protection with release across a vegetated area, by berming and vacuum recovery to a holding tank, by filtration before release, or by hauling recovered water off site, and the method is named in the quote.
The Brick Industry Association states "Do not use water pressures higher than 400 psi (2800 kPa) as measured at the nozzle tip unless permitted by brick manufacturer", and defines high pressure as greater than 800 psi, adding that "High-pressure water cleaning is not appropriate for brick and may damage the brickwork." The association also asks for a trial clean on a 20 square foot sample area before the full elevation is cleaned.
A Roswell restaurant stays open by having customer-facing zones cleaned outside service hours and back-of-house zones cleaned during the day. Georgia Administrative Code Rule 511-6-1-.07, subsection (5)(b)2, requires that cleaning "shall be done during periods when the least amount of food is exposed, such as after closing", which is why patio decking and dumpster pads are worked after close rather than between services.
A Roswell commercial property carries several intervals at once rather than one. Dumpster pads and drive-through lanes run monthly to quarterly, entry walkways and outdoor dining run quarterly on high-traffic frontage, building elevations run annually and twice a year on north facing or tree-shaded walls, and parking lots run annually after the spring pollen drop.
Thrare Contracting returns a W-9 in the legal entity name Rare Earth Ltd, a certificate of insurance with the certificate holder wording the management system requires, method statements and safety data sheets, and the registrations a buyer tracks. Rare Earth Ltd holds DBE, ACDBE and MBE certification, qualifies as a small disadvantaged business, uses E-Verify, and is registered in SAM under UEI Z4WKS4UE8NJ6 and CAGE 9JAV8. Rare Earth Ltd does not hold HUBZone, 8(a) or SOC 2 status.
Send the business hours, the approximate square footage by surface type, and any known drainage constraint on the site. Serving Roswell, north Fulton County and metro Atlanta from Atlanta.