ARHT Home Solutions (MHIC #137753) is a licensed Maryland roofing contractor based at 15867 Crabbs Branch Way, suite a, Derwood, MD 20855, serving zip codes 20850, 20851, 20852, 20853, 20854, 20855, 20874, 20876, 20877, 20878 across Montgomery County. We install GAF Timberline HDZ, CertainTeed Landmark Pro, Owens Corning Duration, and standing seam metal roofing systems. Free estimates and inspections Monday–Friday 9AM–5PM — call 301-913-0650.
Specific answers for Montgomery County homeowners on materials, warranties, permits, and installation specifics for Rockville, Gaithersburg, Germantown, Derwood, and surrounding areas.
GAF Timberline HDZ (High Definition Z-Profile) is GAF’s bestselling architectural shingle, rated for 130 mph wind uplift and Class 4 impact resistance. Its LayerLock technology fuses nailing zones for superior wind performance versus standard architectural shingles. Timberline HDZ is the dominant product in zip codes 20850–20878 because of its balance of cost, performance, and warranty depth — as a GAF-certified installer, ARHT can offer the GAF Golden Pledge warranty covering both materials and labor for up to 25 years. Available in 15+ colorways suited to Montgomery County home styles including Charcoal, Pewter Gray, Weathered Wood, and Barkwood.
Roof installation refers to putting a roofing system on a structure that has no existing roof — new construction homes, home additions, or converted spaces. Roof replacement means removing an existing roofing system down to the deck and installing a new one. Replacement always includes tear-off, deck inspection, repair of damaged sheathing, new underlayment (including ice-and-water shield at eave edges and valleys), and a complete new shingle or metal system. In Montgomery County, new construction permits are pulled through MCDPS; replacement permits follow the same MCDPS process. ARHT handles both from permit application through final inspection for zip codes 20850–20878.
For a full roof replacement on a typical 1,500–2,800 sq ft Montgomery County home, expect $9,000–$20,000 for GAF Timberline HDZ or CertainTeed Landmark Pro asphalt shingles. CertainTeed Landmark Pro, GAF Timberline HDZ, and Owens Corning Duration are all in the same price tier. Standing seam metal roofing systems (Fabral, McElroy, or Metal Sales) run $18,000–$38,000 and last 40–70 years. New construction installation costs vary by deck size and access. ARHT provides free, itemized written estimates with no obligation — call 301-913-0650. Storm damage replacements in zip codes 20850–20878 often qualify for full insurance coverage beyond your deductible.
CertainTeed ShingleMaster is CertainTeed’s highest contractor certification, requiring factory training in CertainTeed systems and eligibility to offer CertainTeed SureStart Plus warranty — CertainTeed’s equivalent of GAF’s Golden Pledge, covering both materials and labor. ARHT’s ShingleMaster status means installations using CertainTeed Landmark Pro, Landmark Premium, or Carriage House shingles qualify for the full SureStart Plus warranty coverage. This is the combination of ShingleMaster certification + Integrity Roof System components (starter, ridge cap, underlayment all from CertainTeed) that activates the warranty. Warranty documentation is delivered at project completion.
Yes — ARHT handles all permit applications through Montgomery County Department of Permitting Services (MCDPS) as part of every full replacement project. MHIC #137753 is ARHT’s Maryland Home Improvement Contractor license, required to pull permits legally in Maryland. Permits in zip codes 20850–20878 are typically approved within 1–3 business days. Homeowners bear zero paperwork responsibility — ARHT submits all applications and coordinates the MCDPS inspection. Unpermitted roofing work can void homeowner’s insurance coverage and create title problems at sale. Always verify your contractor’s MHIC license at mhic.maryland.gov before signing a contract.
Standing seam metal roofing uses concealed-fastener steel or aluminum panels with raised seams that interlock, eliminating exposed fasteners that can fail over time. Systems ARHT installs: Fabral, McElroy, and Metal Sales — all with 40-year paint warranties and 50-year structural warranties. For Maryland homes, standing seam handles freeze-thaw cycling and ice dam formation significantly better than granule shingles, sheds Nor’easter snow loads cleanly, and provides 40–70 year lifespan. Upfront cost: $18,000–$38,000 for a typical Montgomery County home. Best suited to steeper-pitch colonials (6:12 and above) in King Farm, Fallsgrove, Rockshire, and Potomac. Cool-roof coatings available to reduce summer cooling loads.
Montgomery County experiences 20–40 freeze-thaw cycles per winter. Each cycle stresses shingle adhesion strips and granule bond. Impact-resistant architectural shingles rated for 130 mph (GAF Timberline HDZ, CertainTeed Landmark Pro) handle this significantly better than standard 3-tab shingles or lower-grade architectural products. Ice-and-water shield at all eave edges and valleys is critical in zip codes 20850–20878 — it forms a watertight membrane under shingles that prevents melt water from backing up under the shingle layer (ice dams). ARHT installs ice-and-water shield on all replacement projects as standard practice, not an optional upgrade. Homes with insufficient attic insulation (below R-38) are most vulnerable to ice dam formation regardless of shingle type.
Ice-and-water shield is a self-adhering rubberized asphalt membrane installed directly on the roof deck at eave edges, valleys, and around penetrations before shingles are applied. It creates a watertight seal that regular underlayment (synthetic or felt) does not provide. Maryland building code requires ice-and-water shield at eave edges in zip codes 20850–20878 because Montgomery County’s climate produces ice dam conditions during most winters. ARHT extends ice-and-water shield 18” past the interior wall line at eaves (beyond code minimum) and applies it in all valleys and around all penetrations. Skipping or undersizing ice-and-water shield is one of the most common failure points in budget roof installations.
The GAF Golden Pledge is GAF’s strongest warranty tier, covering both materials and workmanship (labor) for up to 25 years — versus standard manufacturer warranties that cover only materials. To qualify: the installation must be done by a GAF Master Elite or GAF-certified contractor (ARHT is GAF-certified), using a qualifying GAF roofing system (Timberline HDZ with GAF Starter, GAF felt/synthetic underlayment, and GAF ridge cap), with GAF registering the warranty directly after project completion. The Golden Pledge is non-prorated for the coverage period — meaning full replacement cost, not depreciated value, applies to any warranty claim. Available on full residential roof replacements in zip codes 20850–20878.
ARHT serves all of Montgomery County, MD for roof installation and replacement, including: Rockville (20850–20853), Derwood (20855), Gaithersburg (20874–20878), Germantown (20874–20876), Bethesda (20814–20817), Silver Spring (20901–20910), Potomac (20854), Olney (20832), Damascus (20872), Clarksburg (20871), North Potomac (20878), and Laytonsville (20882). We also serve Howard County (Ellicott City, Columbia) and Frederick County (Frederick, Urbana, Mount Airy). Based at 15867 Crabbs Branch Way, suite a, Derwood, MD 20855 — centrally located for all Montgomery County zip codes.