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ROOFING · SIDING · GUTTERS
Roofing & Exterior Contractor in Cornwall, NY.
Cornwall combines river views, wooded lots and established neighborhoods — all of which need exterior systems built for moisture, wind and heavy winter weather. We serve Cornwall homeowners with full roofing, siding and storm repair crews.
WHAT WE DO HERE
Every service we offer is available in Cornwall, NY
13 SERVICE LINES · 1 CREW
Roofing
Asphalt, metal, storm repairs
- GAF Certified Installer · 50-year material warranty
- Full tear-off, deck inspection and replacement as needed
- Architectural, designer, and standing-seam metal options
- Storm response and insurance claim assistance
EXPLORE
Siding
Vinyl, fiber cement, wood
- Hardie ColorPlus, vinyl, engineered wood
- House-wrap + window & door re-flashing on every install
- Soffit, fascia and trim color-matched to siding
- Lifetime fade & finish warranty on Hardie ColorPlus
EXPLORE
Gutters
Aluminum, vinyl, steel
- On-site seamless gutter machine — no joints, no leaks
- 5" and 6" aluminum in 20+ baked-on colors
- Hidden hangers, leaf guards, downspout extensions
- Free gutter cleaning on every roof we install
EXPLORE
Chimneys
Crowns, flashing, liners, caps
- Full chimney rebuilds and tuckpointing
- Stainless step + counter-flashing, never tar patches
- Custom-fabricated chase covers and crickets
- Crown rebuilds with proper overhang and drip edge
EXPLORE
Decks
Custom decks built to last
- Composite, PVC, cedar, pressure-treated
- Engineered footings and joist layout
- Hidden fasteners, picture-frame borders
- Permitted and inspected — done right
EXPLORE
Railings
Aluminum, composite, wood, cable
- Aluminum, composite, wood, cable, glass panel
- Code-compliant 36" / 42" rail heights
- Hidden post anchors — no surface-mount wobble
- Custom gates and accessibility ramps
EXPLORE
Interior Repairs
Drywall, paint, floors, insulation
- Drywall patching, finishing and texture matching
- Painting — interior, exterior, full color consult
- Hardwood and laminate repair / replacement
- Insulation and ceiling restoration after water damage
EXPLORE
Painting
Interior, exterior, trim and stain
- Interior walls, ceilings, trim and doors
- Exterior siding, trim, shutters and porches
- Deck and railing stain / solid-color coatings
- Lead-safe prep on pre-1978 homes (RRP certified)
EXPLORE
Roof Replacement
Tear-off, new deck, new roof
- Full tear-off down to the deck — never a roof-over
- Rotten sheathing replaced before the new roof goes on
- Architectural shingles or standing-seam metal
- Permit, dumpster and magnetic nail sweep included
EXPLORE
Roof Repair
Leaks, missing shingles, flashing
- Leak detection from the roof and the attic
- Shingle, flashing and pipe-boot repairs
- Emergency tarping after storms
- Photo report before and after every repair
EXPLORE
Storm Damage Repair
Wind, hail, trees, insurance
- Storm damage inspection with dated photos
- Tarping and board-up to stop further damage
- Adjuster meetings and written repair scope
- Roof, siding and gutter repairs in one visit
EXPLORE
Roof Inspection
Condition report, photos, advice
- Roof surface, flashing, vents and gutters checked
- Attic check for leaks, ventilation and moisture
- Photo report with plain-language recommendations
- Estimated remaining life of the roof
EXPLORE
Emergency Roof Repair
Active leaks, tarping, fast response
- Active leaks prioritized over regular work
- Tarping and temporary seals the same day when possible
- Photos of the damage for your insurance
- Permanent repair quote after the emergency
EXPLORE
LOCAL KNOWLEDGE
Neighborhoods we work inWhat we see in Cornwall, NY
Cornwall projects often involve steep rooflines, tree cover and exposure to Hudson Valley weather — making proper underlayment, ventilation and flashing especially important.
Cornwall-on-HudsonMountainvilleFirthcliffeAngry Orchard corridorRoute 9W areaWoodland Avenue district
● TOWN FACT SHEET · 12518
Service focus
Roofing, siding, gutters and hillside exterior restoration
Local character
River-town feel with wooded residential streets and older housing stock
Weather risk
Moisture, wind and ice dams are recurring concerns on shaded roofs
Common property type
Colonials, capes, hillside homes and river-adjacent properties
Coverage note
Short drive west from New Windsor via Route 32 and 9W
VIEW OUR WORKS
View All →Recent roofing & exterior work
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Stone chimney flashing installation on asphalt shingles
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Roofer applying sealant to stone chimney flashing
OUR REVIEWS
FIVE STARS. EARNED, NOT ASKED.
Real reviews from real homeowners across our service area. We don't run promotions for testimonials — we just do the work right.
"I contacted THUNDER Pro Construction for a roof repair, and they exceeded all of my expectations. Diego and his team are simply the best! Th…"
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Miguel Vera
Google Review · 3 months ago
"THUNDER Pro Construction is hands down the best company for roof replacement! Diego and his team were reliable, professional, and paid atten…"
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Yordy Vera
Google Review · 3 months ago
"We are beyond happy with our new deck! THUNDER Pro Construction LLC exceeded all of our expectations. Diego and his team were knowledgeable,…"
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Nayeli vera
Google Review · 3 months ago
"Thunder Pro Construction did an outstanding job from start to finish. The crew was professional, arrived on time, kept everything clean, and…"
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Cristian Villavicencio
Google Review · 3 months ago
"Excellent workmanship repairing and replacing porch columns"
Marlo Barnes
Google Review · in the last week
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QUESTIONS
Cornwall, NY specific questions
More questions? Call (845) 234-9871 or request an estimate — we don't believe in pressure sales.
Why does my Cornwall roof have black streaks and moss?
Shade and moisture from tree cover let algae and moss grow on shingles. Cleaning helps short-term, but at replacement we use algae-resistant shingles and better ventilation so the problem doesn’t come back.
Is a metal roof worth it in Cornwall?
For many Cornwall homes, yes. Heavy snow slides off, moss has nothing to hold on to, and a standing-seam roof lasts much longer than asphalt under constant shade.
How do you fix an ice dam leak in Cornwall?
We repair the damaged shingles and underlayment, extend ice and water shield where it is missing, and check attic ventilation and insulation so the ice dam does not form again.
Why does one side of my Cornwall house always look green?
That’s mildew and algae on a wall that stays shaded and damp. Washing helps, but long term we recommend factory-finished fiber cement or vinyl and better clearance from soil and plants so the wall dries out.
SERVICE AREA MAP
Serving Cornwall, NY from New Windsor
Our crews drive out of 77 Lawrence Ave, New Windsor, NY 12553 for every job in Cornwall, NY. Free on-site estimates Monday–Saturday, 7 AM–5 PM, plus a 24/7 storm line.
FREE ESTIMATE — NO OBLIGATION
READY WHEN YOU ARE. SAME-DAY QUOTES AVAILABLE.
Tell us about your roof, your storm damage, your siding job — anything. We'll come out, inspect, and put a written estimate in your hand. No pressure, no games.