Proper headlap
Each course gets the headlap the slope calls for which keeps water out at every joint.
Slate Roofing
Slate Roof Installation Cresskill, NJ
Slate roof installation in Cresskill is about more than the stone: the slate grade, deck, underlayment, nails, headlap and flashing all decide whether the roof lasts a century. Call (551) 395-0321 to reach a local roofer who installs slate.
A slate roof starts with picking the stone. Slates are graded by how long they last, with hard slate outlasting soft slate, and they come in a range of natural colors. Color stability matters too: unfading slate stays the same, while weathering slate changes tone over time.
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. Slate also needs a solid deck and a slope of at least 4 in 12 under typical building codes.
The fasteners and flashing are what make a slate roof last. Two nails per slate, copper or stainless and never driven tight, let the slate hang freely and keep it from cracking. Copper valleys and flashing are standard on slate, since lesser metals wear out decades before the stone does.
Many slate roof installation calls in Cresskill also turn up a need for slate roof replacement or slate roof repair.
Need slate roof installation in Cresskill? Call (551) 395-0321 and describe the problem to a roofer who works in Cresskill.
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
Framing is checked, the slate is selected by grade, color and size, and the exposure is worked out from the slate length and headlap. Exposure is the slate length minus the headlap, divided by two.
Lay the underlayment
Underlayment goes over a solid deck, with ice barrier at the eaves where codes require it. Edge metal goes on along the eaves and rakes.
Lay the starter
At the eaves, a starter row and a raised cant strip set the first course at the correct pitch. Joints in the first course are offset from the starter below.
Lay each course
The field slate goes on course after course with offset joints, consistent headlap and two nails per slate that are never driven tight. Headlap is set by slope, with more on lower pitches and less on very steep ones.
Flash the roof
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 are often added so snow does not slide off the slate in sheets.
Finish the ridge
The ridge is finished in slate or copper, and hips are laid in a traditional pattern. Spare slates from the same lot are left for future repairs.
What is included
Parts of a slate roof installation
Structural review
An engineer or span check confirms the structure before any stone is ordered.
Snow guards
The ridge and hips are capped in a traditional pattern to protect people, gutters and plantings below.
Valley metal
Valleys, walls, chimneys and pipes are flashed in copper instead of metals that wear out early.
Underlayment
Underlayment and ice barrier go down with ice barrier at eaves where needed.
Related service
Natural Slate Roofing Cresskill, NJ
Natural slate roofing uses stone that has been quarried and split into slates, with no coatings or binders to wear off. It will not burn or rot, and quality slate shrugs off weather for a very long time. Each slate is slightly different in thickness and texture, which gives the roof its handmade look.
Natural slate roofing in Cresskill 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. Seeing actual slate samples, not just a brochure, helps you pick the right color and texture.
Local help
Slate Roof Installation Near Me
Slate roofs in Cresskill are most often seen on older and historic homes, but new slate still goes onto custom homes and additions. From Cresskill out to Demarest, Tenafly, Dumont and Closter, a slate roof goes on slowly and by hand, so planning ahead with the roofer matters, and snow guards and copper flashing are worth planning for from the start.
For slate roof installation in Cresskill, NJ or nearby towns like Demarest, Tenafly, Dumont and Closter, call (551) 395-0321 to reach a roofer who covers your street.
What the local climate does to a roof
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 Cresskill, 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.
Familiar with local homes
Local roofers see the same roofs and storm damage across Cresskill 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
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. Homes built for slate carry it fine, but a house framed for shingles may need an engineer and added framing before switching. Thinner slate or synthetic slate can be options where the framing falls short.
How long will a slate roof installation take?
A slate roof takes considerably longer than a shingle roof, commonly several weeks. Dormers, valleys, turrets and framing upgrades all extend the schedule. Once the underlayment is down, the house is protected from rain.
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 is the difference between hard and soft slate?
Hard slate is denser and can last well over a century, while soft slate gives a shorter, though still long, service life. Soft slate can still be a good choice and is easier to cut and shape, but it wears sooner. Pick based on the lifespan you want and the look of the house.
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. Rusted steel nails are the reason so many older slate roofs have slipped slates. Two nails hold each slate, set so it hangs loosely and does not crack.
More questions? Call (551) 395-0321
Other services that may help
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, with salvage of good slate wherever possible.
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
Installing a new roof layer by layer, from drip edge and underlayment to flashing, vents and the finished roofing, with ventilation and flashing planned in from the start.
Learn moreRoofing Contractor
A local roofing contractor for repairs, replacements, inspections and new roofs on homes, with a written scope before any work starts.
Learn more
Looking for something else?
See all roofing servicesNeed slate roof installation in Cresskill, NJ?
Call (551) 395-0321 to talk to a roofer serving Cresskill, NJ.