Grayson takes its whole year of rain in a short winter, so a roof is either ready in October or it is not. The nearest station with 1991-2020 normals, Tracy Carbona, gives 12.72 inches a year, with February at 2.57 inches ahead of January's 2.34 and December's 2.32, a dry July and a July maximum of 93.2 degrees. The same normals show why nothing washes a roof here between May and October: the debris simply waits for the first storm.
This is a hundred-acre community, so the roofs are counted one at a time rather than run as a programme. LAFCO puts the Grayson Community Services District at about 100 acres and describes the land inside it as residential, commercial and industrial, while the County's 2015 study found the One-Stop Market, a small convenience market with gas pumps and a laundromat, was then the only store in town, with the nearest full-service groceries about two miles away in Westley. Each low-slope roof here is surveyed on its own and priced on its own.
On a small building the leak almost always starts where equipment sits, not out in the field of the roof. The County's five-year capital plan budgets $235,000 under CIP 2023.046 to evaluate the community center building's systems and replace an air conditioning system at the end of its useful life. Every unit that comes off leaves a curb, a pitch pan and a counterflashing behind it, and under Chapter 15 of the California Building Code flashings and drain outlets that are rusted or deteriorated are not reinstated.
What leaves a Grayson roof joins a system that has to be pumped. The gutters here drain into storm drain pipes and a detention basin that pumps out to the San Joaquin River bottom, where the water then flows overland to the river. When the river is high that route is slow, and Grayson Road east of town, the community's link to emergency services across the river, became impassable in the 2011 and 2017 high-water events. A roof outlet that discharges at grade in those conditions leaves water standing against the wall.
Past a threshold, replacing a small Grayson roof brings the energy code with it. The re-roof rules reach nonresidential low-slope work where more than 50 percent of the roof area or more than 2,000 square feet is altered, whichever is less, and the product then has to reach a 3-year aged solar reflectance of 0.63, thermal emittance of 0.75 and SRI 75. On a building of 3,165 square feet, 2,000 is most of the roof, so the values are settled before the estimate is written.
The 2020 Census counted 1,041 people and 284 housing units in the Grayson census place, on 0.184 square miles of land. At that size the commercial roof stock is small enough to know building by building, which is how the survey treats it.
Grayson sits 14 road miles from the Modesto base, north-east of the Highway 33 and Grayson Road intersection and about 1.3 miles east of the highway. Survey notes, the marked plan and the photographs stay in one file.
A request names the building and what has shown inside it, and the visit that follows puts someone on the roof to see the outlets, the equipment and the parapet line before any number is written. Site visit scheduled at a time that suits you. Start date set in the written estimate.
The plan is marked where each outlet, lap, curb and penetration sits, and moisture readings or a core show whether the insulation under a suspect area is still dry. On a small roof that survey takes one visit, and it is what both the coating price and the tear-off price rest on.
Chapter 15 sets the route, and Stanislaus County's Building Permits Division at 1010 10th Street in Modesto permits the work, since land use in the District stays with the County. The assigned contractor pulls it.
The estimate arrives as separate lines, wet-material removal apart from the new surface, and states whether the figure is fixed or moves on findings.
The date is set around the community center's bookings, the market's hours and the river season, and tear-off is kept in the dry run from July to September. Edge protection goes up first, and any rooflight is covered before a crew is within six feet of it.
Outlets are cleared, flashings rebuilt to the maker's instructions, and the tear-off hauled off the lot to a permitted facility.
The owner is left with the marked survey, before and after photographs, the warranty terms, the inspection record and, where the energy code applied, the product's rating label.
Grayson is bounded by Hito Drive, the river, Grayson Road and River Road, and its roofs sit inside that square.
The 5-acre United Community Center and Park at Laird and Mary Streets holds a 3,165 square foot building with an air conditioning system at the end of its life. A unit change-out there is a flashing job as much as a mechanical one.
Well 274 at 8820 Charles was drilled in 1967 and is now listed inactive, replaced by Well 69 at the southeast corner of Charles and Mary Streets. Utility structures like these carry small roofs whose value is the equipment they keep dry.
Well 295 at 8415 Yamamoto Way, drilled in 1989 in Grayson Park, carried the system's treatment and its only standby power in 2010, and the nitrate removal plant serving the whole system stands here. Enclosures around plant are surveyed for their flashings and penetrations.
The half-acre Leroy F. Fitzsimmons Memorial Park sits at Amelia and Stakes on the eastern edge, with a basketball court, picnic shelter and playground, and the District boundary runs along Stakes and Charles Streets with the river just beyond.
A two-lane major road the General Plan classes as a four-lane expressway, forming the southern border and linking the community to Highway 33 and Westley. Materials and the tear-off both travel it, so the staging point is agreed before the day.
The community's northern boundary is Hito Drive, its western one River Road. Land north of the community was zoned Planned Development, but the designation has expired and use is limited to agriculture, so the roofs beyond the edge are farm buildings.
Lagoons and leach fields directly northeast of town, bounded by farmland and the San Joaquin River, designed for 100,000 gallons a day and at capacity. The County lists the plant at risk during high water, which shapes when work there is scheduled.
Grayson Road crosses the river and Laird Slough east of town and went impassable in the 2011 and 2017 high-water events. Laird Regional Park, 97 acres at 8250 W Grayson Road, has ball fields, picnic shelters and river access.
Stanislaus County. The Building Permits Division at 1010 10th Street, Suite 3400, Modesto requires a permit for all new construction, additions, alterations, upgrades, rebuilding or remodeling of existing structures, and LAFCO records that responsibility for land use decisions inside the Community Services District stays with the County. Because the community borders the San Joaquin River's 100-year floodplain, a building inside a Special Flood Hazard Area also gets a substantial-improvement review where repair costs pass half the structure's value. The contractor assigned to the request pulls the permit.
In the summer. Tracy Carbona, the nearest normals station, has a dry July and a July maximum of 93.2 degrees, against 2.57 inches in February, 2.34 in January and 2.32 in December. Tear-off belongs in that dry block and drain clearing in October, before the gutters, pipes and the detention basin have to carry anything. Site visit scheduled at a time that suits you. Start date set in the written estimate.
It means the roof is opened where the unit sits. The capital plan budgets $235,000 to evaluate the building's systems and replace an air conditioning system at the end of its useful life, and a change-out leaves the curb, the pitch pans at the pipe and conduit penetrations, and the counterflashing to be rebuilt. Under Chapter 15 a flashing, edging or drain outlet that is rusted, damaged or deteriorated is not reinstated, and flashings are reconstructed to the manufacturer's instructions.
It affects the date, not the work. The County describes Grayson Road east of town as a critical evacuation and emergency response route that became impassable in the 2011 and 2017 high-water events, and it has studied raising the embankment near Laird Slough, adding culverts or building a causeway. Roof work is planned around which approach is open, which is one more reason for the survey and the tear-off to sit in the dry months rather than in February. If a winter storm opens a Grayson roof before its planned date, closing that opening is temporary cover and board-up, and the permanent repair still runs to the survey.
Both are single-ply membranes the code's material table covers, TPO to ASTM D6878 and PVC to ASTM D4434, and both are installed and repaired here. The practical question is what sits on the roof: where cooking or process exhaust discharges near the membrane, the choice is checked against the manufacturer's own chemical-resistance data for that product rather than against a general rule. No performance comparison is offered here, because nothing in the sources this page is written from supports one.
Sometimes. A new protective coating is permitted over an existing coating, metal panel, built-up roof, spray polyurethane foam, metal shingles, mineral-surfaced roll roofing, modified bitumen or single-ply membrane without a tear-off. It is not permitted where the existing roof is water-soaked or deteriorated past being an adequate base, where the covering is slate, clay, cement or asbestos-cement tile, or where two or more coverings already sit on the deck. On an older Grayson building the count of existing layers is one of the first things the survey establishes.
