Kensington’s Premier Roof Installation Company

If you had to install a new roof on your Kensington home this year, would you know exactly what you’re paying for-and how long it should really last? Here’s the difference: a rushed crew can strip and re-shingle a small house in one long day, leave you with a certificate of insurance, and be gone before you notice the flashing around your brick chimney doesn’t match the manufacturer’s specs. A properly planned roof installation takes two full days minimum, includes a pre-job roof inspection where we photograph and explain every weak spot, gives you material options with real lifespan numbers, and builds in roof waterproofing and chimney flashing details that keep water out for the next twenty-five years.

I’m Raj. I’ve been installing and replacing roofs in Kensington for fourteen years, and I work with Dennis Roofing because we do fewer jobs and take the time to do them right-especially full roof installations where the details actually matter. Most of my days are spent on the neighborhood’s mix of pre-war brick walk-ups, semi-detached houses with steep shingle roofs near Ocean Parkway, and flat-roofed rear extensions behind rowhouses. What I’ve learned is that Kensington roofs deal with specific problems: tree cover that clogs gutters twice a year, wind-driven rain that finds any gap in flashing along Church Avenue, and flat roof membranes over unheated spaces that expand and contract hard during freeze-thaw cycles. A good roof installation accounts for all of it upfront.

When You Actually Need a New Roof Installation in Kensington

Most homeowners wait too long. They patch a roof leak, then patch another one eighteen months later, then call me after the third leak shows up in a different room and they realize the whole system is failing. Here’s the decision framework I use: if your asphalt shingle roof is over 22 years old and you’re seeing granule loss and curling edges, it’s time. If your flat roof has multiple patches, visible cracks in the membrane, or ponding water that sits for more than 48 hours after rain, replacement is cheaper than endless emergency roof repair calls. If you’re planning a gut renovation or adding a skylight installation, that’s the moment to replace the roof-not after you’ve finished the interior work.

On a semi-detached home off Ocean Parkway last fall, the owner called for what he thought was minor roof leak repair around his chimney. When I climbed up, the asphalt shingles were 26 years old, brittle, and the roof decking underneath had soft spots from years of slow moisture penetration. We could have patched the chimney flashing and bought him another year, but the next wind storm or heavy snow load would have opened new leaks elsewhere. I showed him photos, explained the cost difference between patching now and replacing in an emergency next winter, and he chose a full roof replacement with proper roof waterproofing and new gutter installation. That roof will outlast his mortgage.

Flat Roof Installation: EPDM, TPO, Modified Bitumen, and Tar and Gravel

Most Kensington rowhouses and brick buildings have flat roofs or very low-slope roofs over rear extensions, and the material choice matters more than most homeowners realize. EPDM roofing (rubber roof) costs $4.50-$6.80 per square foot installed, lasts 25-30 years, and handles temperature swings well-it’s my default recommendation for residential flat roof installation on homes where the roof isn’t visible from the street and the priority is a long, low-maintenance lifespan. TPO roofing is slightly more expensive at $5.20-$7.50 per square foot but reflects heat better, which matters if you have living space directly under the roof or you’re trying to lower cooling costs on a top-floor apartment.

Modified bitumen roofing is tougher and works well on flat roofs that see foot traffic-say, if you access your roof to clear gutters or check HVAC equipment. It’s a two-layer system, costs $5.80-$8.20 per square foot, and the seams are heat-welded for excellent roof waterproofing. If you have an old tar and gravel roof that’s failing, we can remove it and install any of these modern membranes, but the removal adds $2-$3 per square foot to the job because tar and gravel is heavy and labor-intensive to strip.

On a flat-roofed extension behind a rowhouse near Ditmas last spring, the owner had a 30-year-old tar and gravel roof that was leaking in three spots. We tore it off, found rotted roof decking in two sections, replaced the decking, added tapered insulation to eliminate ponding water, and installed a fully adhered EPDM membrane with new roof flashing at the parapet walls. The job took four days and cost $8,400 for 650 square feet. That roof now sheds water properly, and the homeowner can forget about it for twenty-five years.

Asphalt Shingle Roofing and Metal Roof Installation

Detached and semi-detached houses in Kensington-especially near Ocean Parkway and along the quieter blocks south of Church Avenue-often have steep shingle roofs, and asphalt shingle roofing remains the most cost-effective option at $3.80-$5.50 per square foot installed for architectural shingles with a 25-30 year lifespan. The key is proper roof installation: starter strips at the eaves, ice and water shield in valleys and around chimneys, and careful nailing so wind doesn’t peel shingles off during storms. I’ve seen too many cheap shingle jobs where the crew skipped the starter strip or used three nails per shingle instead of four, and those roofs start failing in year twelve instead of year twenty-five.

Metal roofing is growing in popularity-it costs more upfront at $8.50-$13.00 per square foot installed, but a standing seam metal roof lasts 40-50 years, handles heavy snow and wind better than shingles, and looks sharp on the right house. I installed a metal roof on a renovated home near Caton Avenue two years ago: the owners wanted something that would outlast them, didn’t mind the higher cost, and liked the clean modern look. We used a dark gray standing seam system with concealed fasteners, added snow guards to prevent sliding snow from damaging the gutters, and detailed the chimney flashing and skylight flashing carefully because metal roofs demand precision. That roof will still be performing when the owners’ grandchildren own the house.

Roof Waterproofing, Flashing, and the Details That Prevent Leaks

Most roof leaks don’t start in the middle of the field-they start at transitions. Chimney flashing, skylight flashing, vent pipe boots, parapet walls, and the valley where two roof planes meet. Roof waterproofing means building multiple layers of protection at every one of those spots, and it’s the part of roof installation that separates a twenty-year roof from a ten-year roof.

Chimney flashing repair is one of the most common calls I get in Kensington, because the brick chimneys on these pre-war buildings shift slightly over time and the old flashing-often just bent aluminum tucked into the mortar joints-pulls loose. Proper chimney flashing uses a two-part system: step flashing that’s woven into the shingle courses and counter-flashing that’s embedded into the chimney mortar joints and laps over the step flashing to shed water. When we do a full roof replacement, we always install new chimney flashing this way, and we seal the counter-flashing into fresh mortar joints so it stays put.

Skylight installation and skylight repair require the same attention. A skylight is essentially a hole in your roof, and if the flashing kit isn’t installed exactly to the manufacturer’s specs, you’ll have leaks within three years. I use only the flashing kits that come with the skylight-never generic flashing-and I integrate the flashing with the underlayment and shingles so water is directed around and away from the curb. On a Church Avenue mixed-use building last year, we replaced an old, leaking skylight during a roof replacement: removed the failed unit, reframed the curb to match the new roof plane, installed a Velux skylight with the factory flashing kit, and tied it into the new asphalt shingle roof with ice and water shield extending twelve inches in all directions. That skylight hasn’t leaked once through two winters.

Gutter Installation, Roof Drainage, and Preventing Ice Dams

Your roof is only as good as its drainage system. Gutter installation matters as much as the roof membrane or shingles themselves, because if water doesn’t leave the roof quickly and completely, it backs up, finds seams and gaps, and causes roof leak problems that shouldn’t exist. In Kensington, the tree-lined blocks mean gutters fill with leaves and maple seeds twice a year, and if the gutters are undersized or poorly sloped, they overflow during heavy rain and water runs down your brick facade or pools against your foundation.

When we do a roof replacement, I always evaluate the gutters. If they’re old, sagging, or undersized, we replace them at the same time-usually with 6-inch seamless aluminum gutters that are large enough to handle the water volume from Kensington’s summer downpours. We slope them at ¼ inch per ten feet toward the downspouts, and we add extra downspouts if the roof area is large or the gutter run is long. Gutter repair-re-securing loose sections, sealing leaking seams, replacing damaged end caps-is straightforward, but if your gutters are more than twenty years old and you’re getting a new roof, replacement is the smarter move.

On flat roofs, drainage means scuppers or interior drains, and the roof membrane has to slope toward those drains so water doesn’t pond. Ponding water-standing water that remains more than 48 hours after rain-degrades the membrane and shortens its lifespan. During flat roof installation, we use tapered insulation or cricket framing to create positive drainage, and we make sure the drains are properly flashed and secured so they don’t pull loose or leak at the membrane connection.

Roof Inspection: What We Check Before and After Installation

Every new roof installation starts with a detailed roof inspection. I climb onto the roof, photograph the existing conditions, check for soft spots in the decking, look at the condition of flashing and penetrations, and evaluate the attic ventilation if the homeowner gives me access. This inspection tells me what the new roof needs: is the decking solid or do we need to replace sections? Are the parapet walls sound or is the brick crumbling and in need of repointing? Is the attic properly vented or will trapped heat shorten the lifespan of the new shingles?

After installation, I do a final roof inspection with the homeowner: walk them around the roof (if it’s safe and accessible) or show them photos of the completed work, point out the flashing details and waterproofing steps we took, and explain the roof maintenance schedule-when to clear the gutters, when to schedule a roof cleaning or roof coating application, what to watch for. This final inspection gives the homeowner confidence that the job was done right and sets them up for decades of trouble-free performance.

Roof Maintenance, Roof Coating, and Extending Your Roof’s Lifespan

A well-installed roof doesn’t need much, but it needs something. Basic roof maintenance-clearing gutters twice a year, checking flashing annually, removing debris-adds five to eight years to any roof’s lifespan. For flat roofs, roof coating can extend the membrane’s life significantly: a silicone or acrylic roof coating applied over a sound EPDM or TPO roof adds a protective layer, seals minor cracks, and reflects UV rays. We apply roof coating on commercial roofing systems and residential flat roofs that are fifteen to twenty years old and still structurally sound but starting to show surface wear. It costs $1.80-$3.20 per square foot and can delay a full roof replacement by seven to ten years.

Roof sealing-caulking around vent pipes, sealing small cracks in flashing, resealing skylight curbs-is part of regular maintenance. If you catch small issues early during an annual roof inspection, you avoid emergency roof repair calls and expensive water damage inside your home.

Emergency Roof Repair and Storm Damage Repair

Kensington gets hit with wind storms that peel back shingle edges, heavy snow loads that stress flat roof membranes, and occasional severe weather that tears off flashing or punches tree branches through roofs. Emergency roof repair means stopping the leak immediately-usually with a tarp or temporary patch-then coming back to do the permanent repair once conditions allow. We respond to emergency calls within 24 hours, and if your roof is damaged by a storm and you’re filing an insurance claim, we document the damage with photos, provide a detailed repair estimate, and work with your insurance adjuster to make sure the claim covers the full scope of necessary repairs.

Wind damage repair often involves replacing torn shingles, re-securing lifted membrane sections on flat roofs, and replacing damaged flashing. Storm damage repair can be more extensive-replacing sections of roof decking, repairing structural framing if a tree limb caused damage, and sometimes doing a partial roof replacement if the damage is concentrated in one area.

Commercial Roofing and Commercial Roof Repair in Kensington

The small commercial buildings along Church Avenue and McDonald Avenue-mixed-use buildings with retail on the ground floor and apartments above-need the same careful roof installation and waterproofing as residential buildings, but the stakes are higher because a roof leak in a commercial space means business interruption, damaged inventory, and unhappy tenants. Commercial roofing in Kensington is almost always flat roof systems: TPO, EPDM, or modified bitumen, chosen for durability and ease of maintenance.

Commercial roof repair often involves patching membrane seams that have failed, resealing roof drains and scuppers, and addressing ponding water issues with tapered insulation or additional drains. We schedule commercial roofing work to minimize disruption-often working early mornings or weekends-and we coordinate with building managers to ensure roof access for HVAC equipment and other rooftop systems is maintained throughout the project.

Roof Installation Cost and Material Comparison for Kensington

These costs include tear-off of one layer of existing roofing, disposal, new underlayment or insulation, membrane or shingles, flashing, and labor. Add $2,800-$4,200 for a typical Kensington home if the roof decking needs partial replacement. Add $1,200-$1,800 for new gutter installation on a standard rowhouse. Skylight installation adds $1,400-$2,600 per skylight depending on size and type.

Why Roof Leak Detection and Roof Leak Repair Matter Before Replacement

Sometimes a homeowner calls convinced they need a new roof, but what they really need is targeted roof leak repair. Roof leak detection-finding the exact entry point of water-saves thousands of dollars when the problem is isolated. I use a combination of visual inspection, water testing, and infrared moisture scanning on flat roofs to pinpoint leaks. On a Church Avenue brick building last spring, the owner had water stains on a third-floor ceiling and assumed the whole flat roof was failing. We found the leak: a single split seam in the EPDM membrane near a vent pipe, caused by thermal expansion during winter. We cleaned and prepped the area, applied a patch with proper roof sealing and waterproofing, and the leak stopped. Cost: $420. A full roof replacement would have been $12,000.

But roof leak repair only works if the roof system is fundamentally sound. If the membrane is twenty-five years old with multiple patches, brittle rubber, and widespread cracking, patching is just delaying the inevitable. That’s when I recommend roof replacement and explain why spending $12,000 now is smarter than spending $1,500 on repairs over the next three years and still ending up with a failing roof.

How Long Does Roof Installation Take in Kensington?

A typical asphalt shingle roof replacement on a Kensington semi-detached house takes two full days: day one for tear-off, decking inspection and repair, underlayment, and starting the shingle installation; day two for completing the shingles, installing ridge vents, flashing all penetrations, and cleanup. A small flat roof installation-say, 600 square feet on a rear extension-usually takes one to two days depending on the existing roof condition and whether we’re adding insulation or new drains. Larger projects, especially commercial roofing on multi-story buildings, can take a week or more.

Weather matters. We don’t install roofs in rain or snow, and we don’t start a tear-off if heavy rain is forecast within 24 hours-leaving a roof exposed overnight is asking for interior water damage. In Kensington’s spring and fall, we sometimes have to pause mid-project for weather, which is why we always tarp the roof securely at the end of each day until the installation is complete.

Choosing Dennis Roofing for Your Kensington Roof Installation

What you’re paying for with Dennis Roofing isn’t just labor and materials-it’s a roof installation process that starts with education. I’ll meet you at your home, inspect the roof, explain what I see, and give you options with real costs and real lifespans. We’ll talk about roof waterproofing, whether skylight installation makes sense for your project, if your gutters need replacement, and what roof maintenance will look like over the next twenty-five years. Then we’ll schedule the work at a time that works for you, show up when we say we will, complete the installation with careful attention to flashing and drainage details, and walk you through the finished roof so you understand exactly what you got.

Most of my new clients come from referrals-neighbors who saw our crew working on a nearby house, homeowners whose friends had a good experience, property managers who’ve used us on multiple buildings. That tells me we’re doing the part of the job that matters most: installing roofs that perform quietly for decades and making the process clear and low-stress for the people who have to write the check.

If you’re looking at your Kensington roof and wondering if this is the year to replace it, call Dennis Roofing. We’ll schedule a roof inspection, explain what your roof needs, and give you a detailed proposal that breaks down every material choice and cost. No surprises, no upselling, just a straightforward path to a roof that’s built right and built to last.