Valley metal
Long life metal is used at every flashing point to match the life of the slate.
Slate Roofing
Slate Roof Installation Cranford, NJ
A Cranford 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. One call to (908) 562-6887 reaches a nearby slate installer.
The first choice on any slate roof is the slate itself. Different slates vary in durability as well as color, from long lived hard slate to softer slate with a shorter service life. Some slates hold their color, called unfading, while weathering slates shift in tone over the first years.
Slate is heavy, so the house has to be ready for it. Natural slate is among the heaviest roof coverings, so framing built for shingles may need reinforcement before slate goes on. 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 Cranford also turn up a need for slate roof replacement or slate roof repair.
Looking for Cranford slate roof installation? Call (908) 562-6887 to talk to a local roofer.
Call nowThe process
How slate roof installation works
A slate roof is built slowly and by hand, one course at a time.
Choose the slate
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. Drip edge and a cant strip at the eaves come next.
Lay the starter
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
Course by course, slates are set with offset joints and the right headlap, each hung on two copper or stainless nails. Lower pitches get more headlap, and very steep pitches can use less.
Install copper flashing
Copper step flashing is woven in along walls and dormers, counter flashing is set into chimney mortar joints and valleys are lined with copper. Snow guards help hold snow on the roof, since snow slides off smooth slate in heavy sheets.
Finish the ridge
Ridges and hips are finished with a saddle or combed ridge, mitered or Boston hips, or copper ridge caps. A stock of spare slate is left with the owner for later repairs.
What is included
Parts of a slate roof installation
Copper fasteners
Every slate hangs on two copper or stainless nails so the fasteners last as long as the stone.
Deck preparation
Underlayment and ice barrier go down lapped to shed water to the eaves.
Ridge finish
Snow guards keep snow from sliding off in sheets with spare slate left for repairs.
Slate selection
An engineer or span check confirms the structure to suit the home and climate.
Related service
Natural Slate Roofing Cranford, NJ
Natural slate roofing uses stone that has been quarried and split into slates, with no coatings or binders to wear off. It is fireproof, does not rot and holds up to weather for generations when it is properly hung. Each slate is slightly different in thickness and texture, which gives the roof its handmade look.
For a natural slate roof in Cranford, the grade, thickness and color of the slate shape both the look and the lifespan. 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
In Cranford, new slate is installed both to match older slate roofs and on newer homes built for a long lasting roof. From Cranford out to Garwood, Westfield, Kenilworth and Roselle Park, a slate roof goes on slowly and by hand, so planning ahead with the roofer matters, and good layout and copper details are what let the roof last for generations.
Searching for slate roof installation near me from Cranford or Garwood, Westfield, Kenilworth and Roselle Park? Call (908) 562-6887 to talk to a roofer who works in your part of town.
How the weather here affects roofs around Cranford
Winters here are long and cold, with snow on the roof for weeks at a time and plenty of nights below freezing. 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. Most homeowners in Cranford, NJ have the roof checked in the fall and again after the snow melts.
Why call
Why not wait
Smaller repairs
A roof problem fixed early rarely spreads to the decking, the insulation or the ceilings.
Roofers who know Cranford
Local roofers see the same roofs and storm damage across Cranford and nearby towns.
Know what happens next
Ask the roofer about the cause, the options and the estimate before work starts.
Slate Roof Installation FAQ
How long does it take to install a slate roof?
A slate roof takes considerably longer than a shingle roof, commonly several weeks. Dormers, valleys, turrets and framing upgrades all extend the schedule. The roof is dried in early, so the house stays protected during the work.
Can my house support a slate roof?
A slate roof weighs far more than shingles, with the exact load depending on the thickness of the slate. Whether a particular house can carry it depends on the framing, so a structural check comes first on any conversion. Thinner slate or synthetic slate can be options where the framing falls short.
Do slate roofs need 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.
Which is better, hard or soft slate?
The main difference is durability: hard slate lasts longer than soft slate. Soft slate can still be a good choice and is easier to cut and shape, but it wears sooner. The right choice depends on how long you want the roof to last and what matches the home.
Why are copper nails used on slate roofs?
Slate can outlast ordinary nails by many decades, so copper or stainless nails are used to match the life of the stone. Steel nails rust out and cause slates to slip, the most common failure on older slate roofs. Each slate gets two nails, driven so the slate hangs without being clamped.
More questions? Call (908) 562-6887
Related services
Slate Roof Replacement
Replacing a slate roof that has reached the end of its life, by relaying the sound slate on new nails or installing new natural or synthetic slate, so the new roof lasts as long as the old one did.
Learn moreSlate Roof Repair
Repairs for natural slate roofs, from a single broken slate to failed copper valleys, so a roof built to last a century keeps going.
Learn moreRoof Installation
Putting on a new roof the way the material maker intends, so it sheds water at every edge and seam.
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 Cranford
Call (908) 562-6887 to talk to a roofer serving Cranford, NJ.