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DECKS · CORNWALL, NY
Decks in Cornwall, NY.
Cornwall, NY decks for hillside and wooded lots — elevated decks, multi-level layouts and rot-resistant composite under heavy shade.
Why hire us for decks in Cornwall?
Cornwall’s hillside lots often mean decks that sit high on the downhill side, sometimes with river or mountain views worth designing around. Those decks need engineered footings, beams and bracing, and shaded wooded lots demand rot-resistant materials. We build with composite or PVC decking on pressure-treated framing protected with joist tape, and lay out multi-level decks that follow the slope. Shade also makes wood decks slippery with mildew, which is a strong reason to choose composite here.
What we see on Cornwall decks jobs
- High decks on downhill sides get engineered footings, beams and bracing.
- Joist tape and composite decking resist rot under heavy shade.
- Multi-level layouts follow the slope instead of fighting it.
Neighborhoods we serve in Cornwall: Cornwall-on-Hudson, Mountainville, Firthcliffe, Angry Orchard corridor, Route 9W area, Woodland Avenue district.
LOCAL PROJECTS
View All →Decks work near Cornwall, NY
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Carpenters framing and building a custom wood deck structure
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Wooden deck railing with decorative solar cap post lights
GOOGLE 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
Common Decks questions in Cornwall, NY
More questions? Call (845) 234-9871 or request an estimate — we don't believe in pressure sales.
Can you build a deck on a steep slope?
Yes. Steep lots need deeper or engineered footings, taller posts and lateral bracing. We design the structure for the slope and get it permitted.
Why is my wood deck always slippery?
Shade and moisture let mildew and algae grow on wood. Composite and PVC decking resist that and clean easily.
Composite or wood?
Composite costs more upfront but needs no staining and carries 25–30 year fade warranties. Pressure-treated wood is economical; we recommend composite for low maintenance.
How long does a deck build take?
Typical single-level deck: 1–2 weeks including footing cure time and inspections. Multi-level or composite builds may run 2–3 weeks.
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.