Structural review
The framing is checked for the weight of slate to suit the home and climate.
Slate Roofing
Slate Roof Installation Summit, NJ
A Summit slate roofer can help you choose a slate, plan the layout and install the roof with fasteners and flashing that last as long as the stone. Dial (908) 679-5768 to talk with a local roofer about a new slate roof.
Slate is not one material but many, and choosing well comes first. Hard slate can last well over a century and soft slate somewhat less, and colors range from grays and blacks to greens, purples, reds and mottled blends. Some slates hold their color, called unfading, while weathering slates shift in tone over the first years.
The structure comes before the stone. A slate roof weighs several times as much as asphalt shingles, and thicker slates weigh more, so a home switching from shingles often needs an engineer to review the rafters and sometimes add framing. Building codes typically require a minimum slope of 4 in 12 for slate, laid over a solid deck.
The fasteners and flashing are what make a slate roof last. Slates are hung on two copper nails each, set just right so the slate is held but not clamped, since a nail driven too hard cracks the slate. Copper flashing at valleys, walls and chimneys is the usual match, because it lasts on the same timescale as the stone.
Many slate roof installation calls in Summit also turn up a need for slate roof replacement or slate roof repair.
Need slate roof installation in Summit? Call (908) 679-5768 and describe the problem to a roofer who works in Summit.
Call nowThe process
What happens during a slate roof installation
Every slate is placed and nailed by hand, and the layers below matter as much.
Plan the roof
The job begins with the structure, the choice of slate and a layout that sets the exposure for every course. Exposure is the slate length minus the headlap, divided by two.
Lay the underlayment
The deck is sheathed or repaired, then covered with underlayment, with ice barrier membrane at the eaves and in valleys where the climate calls for it. Edge metal goes on along the eaves and rakes.
Start at the eave
A starter course goes on at the eave over a cant strip, so the first exposed course lies at the same angle as the rest. Joints in the first course are offset from the starter below.
Nail the field
Each course is laid to a chalk line with the vertical joints offset, and every slate is hung on two copper nails driven just enough to hold it. Lower pitches get more headlap, and very steep pitches can use less.
Flash the roof
Step flashing, counter flashing and open copper valleys are built into the roof course by course. Snow guards help hold snow on the roof, since snow slides off smooth slate in heavy sheets.
Close the top
Hips and ridges are closed with slate laid in a saddle or combed pattern or capped with copper. A stock of spare slate is left with the owner for later repairs.
What is included
A complete slate roof system
Copper fasteners
Each course gets the headlap the slope calls for which keeps water out at every joint.
Copper flashing
Valleys, walls, chimneys and pipes are flashed in copper instead of metals that wear out early.
Underlayment
Sheathing is repaired and dried in before the starter course goes on.
Snow guards
Snow guards keep snow from sliding off in sheets to protect people, gutters and plantings below.
Related service
Natural Slate Roofing Summit, NJ
Natural slate is real rock, split by hand into roofing slates, which is why it can last longer than nearly any other roof covering. It does not burn, it resists rot and insects, and good slate barely changes over generations. Natural variation in texture and edge gives every slate roof a distinct look.
Natural slate roofing in Summit is a long term choice, so it pays to match the slate grade to how long you want the roof to last. Some owners compare natural slate with synthetic slate, which weighs less but lasts far fewer years. Ask the roofer to show real slate samples before ordering so you see the true color and texture.
Local help
Slate Roof Installation Near Me
Slate roofs in Summit are most often seen on older and historic homes, but new slate still goes onto custom homes and additions. For homes in Summit and nearby towns like Chatham, Mountainside, New Providence and Short Hills that were framed for shingles, the structural check is what decides whether slate is practical, and good layout and copper details are what let the roof last for generations.
Need slate roof installation around Summit? Call (908) 679-5768 for a Summit roofer who serves the towns around it too.
What the local climate does to a roof
Cold winters bring snow, ice and a long stretch of freezing nights. Heat escaping from the attic melts snow on the upper roof, and the water refreezes at the colder eaves, which is how ice dams form and back water up under the shingles. Coastal storms and heavy spring rain drive water sideways into flashing, valleys and old chimneys. That is why roof repair in Summit is busiest after a hard winter and before the next one.
Why call
Why act early
Drier ceilings
A roof problem fixed early rarely spreads to the decking, the insulation or the ceilings.
Familiar with local homes
Local roofers see the same roofs and storm damage across Summit and nearby towns.
Straight answers
Ask your questions before you agree to anything.
Slate Roof Installation questions
Can my house support a slate roof?
Slate is among the heaviest roof coverings, several times the weight of asphalt shingles, and thicker slate weighs more. Whether a particular house can carry it depends on the framing, so a structural check comes first on any conversion. Where framing is limited, thinner slate or a lighter synthetic slate may work.
What is the difference between hard and soft slate?
The main difference is durability: hard slate lasts longer than soft slate. Soft slate is easier to work, though it is not meant to last as long. Pick based on the lifespan you want and the look of the house.
Why do slate roofs have snow guards?
Slate is smooth and steep, which lets snow slide off suddenly, and snow guards prevent that. They are most important above entries, walks and lower roofs. In places with little snow, they are less of a concern.
What nails should be used for slate?
The nails have to last as long as the slate, which is why copper or stainless steel is standard. Steel nails rust out and cause slates to slip, the most common failure on older slate roofs. Two nails hold each slate, set so it hangs loosely and does not crack.
How long does it take to install a slate roof?
Expect a longer schedule than shingles or tile, often several weeks for an average home. Dormers, valleys, turrets and framing upgrades all extend the schedule. The roof is dried in early, so the house stays protected during the work.
More questions? Call (908) 679-5768
Other services that may help
Slate Roof Replacement
Full slate roof replacement when the stone, the nails or the flashing have failed across the roof, planned around the weight and look of the home.
Learn moreSlate Roof Repair
Slate roof repairs done with a slate ripper, copper hooks and matching slate rather than tar, so a roof built to last a century keeps going.
Learn moreRoof Installation
Installing a new roof layer by layer, from drip edge and underlayment to flashing, vents and the finished roofing, whether it is asphalt shingles, metal or another material.
Learn moreRoofing Contractor
Residential roofing work from a single leak to a full tear-off, so you know who is on your roof and what they will do.
Learn more
Looking for something else?
See all roofing servicesGet slate roof installation help in Summit
Call (908) 679-5768 for a local roofer in Summit and nearby towns.