Summit Roofing Co · Westchester County
Repair, restoration, and installation of natural and synthetic slate — quarry-matched pieces and copper flashings.
Call (914) 685-8471Brands we install & service
Written pricing. No obligation.
Natural slate is the only roof that outlives the house it sits on: 100–150 years for hard Vermont and Buckingham slate, on homes that have already had a century of it. Much of the pre-war housing in Westchester County was built under slate, and the question owners face is rarely whether to keep it — it is whether the roof needs a repair, a restoration, or a replacement, and who is qualified to say.
Summit Roofing Co repairs, restores, and installs slate roofs — matching quarry and thickness on repairs, replacing failed copper flashings and valleys, and installing new natural or synthetic slate systems where the old roof is past saving. Slate is hand work: every piece is cut, punched, and hung with copper nails, and it is done from ladders and roof jacks, not by walking on the roof.
💲 What does slate roofing cost in Westchester County? See the full 2026 cost guide →Most slate "failures" are failed flashings, a few broken pieces, or a valley at the end of its life — a few thousand dollars, not a new roof. We tell you which it is with photos.
Repairs use slate matched to the color, size, and thickness of what is on the roof, so the patch disappears rather than announcing itself.
Slate outlasts every metal but copper. New valleys, step flashing, and chimney work are done in 16 oz copper, sized to last as long as the slate.
Vermont and Buckingham natural slate for restorations and estate homes; DaVinci and Brava composite slate where weight, budget, or a modern deck rule natural out.
Scarsdale, Bronxville, Larchmont, Rye, and the Hudson River towns were built under slate between 1900 and 1940, and thousands of those roofs are still in service. Most need periodic flashing and valley work, not replacement.
Many Westchester villages require in-kind slate on designated properties. We match quarry, color, and exposure so repairs and replacements pass review.
Slate handles snow load well; what fails is the copper at eaves and valleys after decades of freeze-thaw. Restorations focus there.
Inspection from ladders and the ground with photo mapping — we do not walk on slate roofs we have not assessed
Written scope: repair, restoration, or replacement, with quarry-matched material specified
Copper flashing and valley work, slate replacement piece by piece, or full installation over a reinforced deck
Final walkthrough with photos and a workmanship warranty
Hard slate (Vermont, Buckingham) 100–150 years; softer Pennsylvania slate 60–90. The flashings and nails fail long before the slate does — most slate roofs are lost to neglected metal, not to the stone.
Usually not. A leak in a slate roof is almost always a flashing, a valley, or a handful of broken or slipped pieces. Repairs on a hard-slate roof run a few hundred to a few thousand dollars.
Natural slate weighs 800–1,500 lb per square and needs a framing check first. Synthetic slate installs at asphalt weight on any deck and is the usual answer for new construction and additions.
They should not. Walking on slate breaks it, and standard roofing details fail under it. Slate is a separate trade with its own tools, fasteners, and methods.
Written pricing, no obligation, no pressure.
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