Roofing Services in Dorchester, IA
Dorchester Roofing & Maintenance handles every roofing job from a single-shingle repair to a full commercial re-roof. Here's what we do in Dorchester.
Roof Replacement
Your roof replacement includes a full-system install: ice and water shield at eaves, valleys, and penetrations; synthetic underlayment across the entire deck; aluminum drip edge at rake and eave; starter strip with sealant; architectural shingles with 130+ mph wind rating; and continuous ridge vent for proper attic ventilation. We also install new pipe boots and vent flashing on every penetration.
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Roof Repair
We repair asphalt shingle, metal, flat membrane, and tile roofs. Our trucks carry common repair materials so most fixes happen same-visit. Shingle repairs, flashing replacement, pipe boot swaps, ridge cap fixes, valley re-flashing. All routine for our Dorchester crews.
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Storm Damage Repair
HAAG Certified Inspectors on staff for every storm damage assessment. We document per HAAG residential guidelines: hail hit density per test square, severity classification, functional vs. cosmetic damage distinction. Insurance adjusters trust HAAG methodology because it's the industry standard. Our supplementation process references FM 4473 hail ratings and manufacturer impact resistance specs when fighting for full replacement approval.
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New Roof Installation
For Dorchester new builds, we recommend Tamko Heritage or Malarkey Vista AR for budget-conscious projects and Atlas Pinnacle Pristine with Scotchgard for algae-resistant performance. High-end builds get GAF Timberline HDZ or Owens Corning Duration STORM. Each carries different warranty tiers. We walk you through the comparison so you're choosing with real information, not marketing brochures.
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Metal Roofing
Standing seam metal with Kynar 500 PVDF fluoropolymer finish. The gold standard for color retention and chalk resistance. We install Sheffield Metals and McElroy Metal panels in 24-gauge Galvalume steel. UL 2218 Class 4 impact resistance (qualifies for insurance discounts in most Iowa markets). UL 790 Class A fire rating. Wind uplift rated to 140+ mph per ASTM E1592 testing. Concealed Z-clips allow thermal expansion without stress on fasteners. That's what makes standing seam leak-proof.
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Shingle Roofing
CertainTeed Landmark PRO with NailTrak technology and Max Def color blends. Dimensional color depth that mimics natural cedar. Algae-resistant with StreakFighter technology. Class A fire rating, ASTM D3462 compliant, rated to 110 mph per ASTM D3161 Class F (Landmark PRO IR rated to 130 mph). 5-Star SureStart Plus warranty when installed by CertainTeed SELECT ShingleMaster. That's us. The warranty covers 100% of material and labor costs for 20 years with declining coverage for 30 more.
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Flat Roofing
EPDM (rubber roofing) has a 50+ year track record as a flat roofing membrane. We install fully adhered EPDM with taped or glued seams over polyiso insulation. It's a great option for Dorchester building owners who want proven performance at a lower cost than TPO or PVC.
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Commercial Roofing
We install Carlisle SynTec and Firestone TPO membrane systems in 60-mil and 80-mil thickness over minimum R-25 polyiso insulation (more in climate zones requiring it). Seams hot-air welded at 900°F+ and tested with a seam probe. Fully adhered systems for wind uplift zones per FM I-90 or I-120. Mechanically attached for re-roofs over existing insulation. NRCA member, trained per manufacturer specifications.
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Gutter Installation
Seamless aluminum in 5" K-style is the standard for Dorchester residential. We use 6" K-style on larger homes, steeper pitches, or roof areas with high water volume. Downspouts are 2x3" on 5" gutters and 3x4" on 6" gutters. Matched to handle the flow.
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Roof Inspection
Buying or selling a home in Dorchester? A roof inspection from a licensed contractor beats whatever the home inspector saw from the driveway. We check every component, give you a remaining-life estimate, and flag anything the buyer or seller should know about.
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Emergency Roof Repair
Our trucks carry 20x30 reinforced tarps, 2x4 lumber, plywood sheets, pipe boots, ridge cap shingles, flashing stock, roofing cement, and neoprene screws. We show up ready to secure your roof, not ready to schedule a follow-up appointment.
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Skylight Installation
Skylight installation includes cutting the roof opening, framing a curb with doubled 2x lumber, installing the unit with factory sealant, and weaving the step flashing into the surrounding shingle courses. Interior work includes drywall framing and trim. We handle the full job in Dorchester. Outside and inside.
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