Asphalt Shingle Roofing in New Hampshire
Asphalt covers most New Hampshire homes for good reason — strong value, a wide colour range, and a proven service life. What separates a twenty-year roof from a twelve-year one is the grade you pick and how it goes on.
The Material
The Workhorse of New Hampshire Roofs
Roughly four out of five homes in this state wear asphalt shingles. They are affordable, they come in every colour a neighbourhood association could ask for, and installed properly they will see you through two decades of New England weather.
Where homeowners get caught out is assuming all asphalt is the same. There is a meaningful gap between a builder-grade three-tab shingle and a laminated architectural shingle rated for 150 mph winds — in appearance, in lifespan, and in how it behaves during a February nor’easter.
The other half of the equation is installation. Nailing pattern, starter strip, ice-and-water shield placement, and attic ventilation determine whether a shingle reaches its rated life or falls well short of it. Most roofs that fail early were not defective — they were fitted badly.
This page covers the material itself: grades, wind ratings, lifespan, and pricing. If you want the process of getting a roof replaced, that is on our roof replacement page
Shingle Grades
Three Grades, Three Very Different Roofs
Every asphalt quote you receive will sit in one of these categories. Knowing which is how you compare two numbers fairly.
Budget
3-tab shingles
Single flat layer with cut-out tabs
- Lowest cost per square of any shingle
- Flat, uniform appearance with no shadow line
- Lighter weight and lower wind resistance
- Best suited to sheds, garages, and rental turnovers
Recommended
Architectural shingles
Multiple laminated layers, dimensional profile
- Thicker and heavier — significantly better wind performance
- Shadowed, textured look that suits most NH homes
- Available in wind ratings up to 150 mph
- The standard choice on the large majority of our jobs
Premium
Designer shingles
Heavyweight laminated, slate or shake profiles
- Mimics slate or cedar shake at a fraction of the weight
- Heaviest asphalt product with the longest rated life
- Suits historic homes and high-value properties
- Approaches metal on cost — worth comparing both
Wind Performance
What Wind Rating Do You Actually Need?
Shingles are tested to ASTM standards and sold in wind classes. On the Seacoast this matters far more than it does inland, and it is the spec most quotes leave out entirely.
Class D
Basic rating found on most three-tab products. We do not specify this for primary residences anywhere in New Hampshire.
Class G
Solid choice for sheltered inland homes. Standard on most quality architectural shingle lines.
Class H — our Seacoast spec
What we recommend for coastal and exposed hilltop sites. The upgrade cost is small relative to replacing wind-lifted sections.
The rating only counts if the install matches it
A 150 mph shingle nailed in the wrong place performs like a 90 mph shingle, and the manufacturer’s wind warranty will not cover it. High-wind ratings require a specific nail count, precise placement in the nailing zone, and a proper starter strip along both eaves and rakes. This is the single most common corner cut in roofing, and it is invisible once the roof is finished.
Lifespan
What Decides How Long Your Shingles Last
Two identical roofs on the same street can differ by eight years. These are the reasons why.
Attic ventilation
The biggest single factor, and the most overlooked. Trapped heat cooks shingles from underneath and can strip years off a roof’s life.
Nailing accuracy
Nails placed too high, too low, overdriven, or too few. Each one is a future lifted tab and a voided wind warranty.
Sun exposure
South and west-facing slopes age faster. It is normal to see one side of a roof wear noticeably ahead of the other.
Ice damming
Water backing up under shingles at the eaves lifts and loosens them. Ice-and-water shield is the defence, ventilation is the cure.
Overhanging trees
Shade holds moisture and encourages moss and algae; falling limbs bruise granules. Trimming back pays for itself.
Coastal salt air
Near the water, salt corrodes fasteners and flashing well before the shingles themselves are worn out.
Scope of Work
What’s Included in an Asphalt Shingle Install
The items below are standard on every asphalt roof we install. When a quote comes in noticeably cheaper, this list is usually where the gap is.
- Complete tear-off to the deck — we never overlay
- Deck inspection with rotted sheathing replaced
- Ice-and-water shield at eaves, valleys, and penetrations
- Synthetic underlayment across the full roof
- Manufacturer-specified nailing pattern for the wind rating
- New drip edge, step flashing, and pipe boots
- Ridge cap shingles matched to the field
- Ridge vent with balanced intake ventilation
- Daily magnetic nail sweeps and debris haul-away
- Permit pulled and final inspection handled
- Manufacturer warranty plus our 25-year workmanship warranty
Straight Pricing
How Much Does an Asphalt Shingle Roof Cost?
That is the honest range for most New Hampshire homes. A modest ranch with a simple gable roof in three-tab sits near the bottom; a large colonial in designer shingles with multiple dormers sits at the top. You get an itemized written estimate after an on-site inspection.
- Roof size and pitch — square footage plus how steep it is to work safely
- Shingle grade — three-tab, architectural, or designer
- Wind rating — Class G versus Class H on exposed sites
- Existing layers — two or three old layers means more tear-off
- Deck condition — rotted sheathing found during tear-off
- Complexity — dormers, valleys, skylights, and chimneys
Worth Considering
Should You Look at Metal Instead?
Asphalt is usually right when…
You are working to a defined budget, you may sell within ten to fifteen years, your roof has a complex shape with many angles, or you want the widest possible choice of colour and profile. For most New Hampshire homes, architectural asphalt is the sensible answer.
Metal is worth pricing when…
You intend to stay long term, the property is coastal or badly exposed, ice dams have been a recurring problem, or you are already considering designer shingles — at that price point metal becomes genuinely competitive over the life of the roof.
Local Expertise
Specifying Asphalt for New Hampshire
The same shingle behaves differently in Seabrook than in Keene. These are the details we adjust by location.
Higher wind rating near the coast
Seacoast and exposed hilltop properties get Class H shingles rated to 150 mph as standard. Inland and sheltered sites are generally well served by Class G.
Ice-and-water shield placement
Code sets a minimum at the eaves. On low-pitch roofs and known ice dam trouble spots we run it further up the slope and through every valley.
Corrosion-resistant fasteners
Near the water, standard nails and flashing corrode years before the shingles wear out. Coastal jobs get coated or stainless components as standard.
Ventilation sized to the attic
Ridge vent alone is not a ventilation system. Intake at the soffit has to balance the exhaust, or you get heat build-up in summer and ice dams in winter.
FAQ
Asphalt Shingle Questions
Architectural asphalt shingles typically last twenty to twenty-five years in New Hampshire. Three-tab shingles reach fifteen to twenty. Our freeze-thaw cycles, ice damming, and coastal wind exposure all shorten shingle life compared with milder climates, and attic ventilation makes a significant difference — a poorly ventilated roof can lose five years or more off its expected service life.
Three-tab shingles are a single flat layer with cut-out tabs, giving a uniform appearance at the lowest cost. Architectural shingles are built from multiple laminated layers, which makes them thicker, heavier, more wind resistant, and longer lasting, with a dimensional shadowed appearance. Architectural shingles cost more but are the standard choice on most New Hampshire homes today.
Most inland New Hampshire homes are well served by a Class G shingle rated to 120 mph. On the Seacoast and other exposed sites, we recommend Class H rated to 150 mph. Rating alone is not enough, however: the wind warranty only applies when the shingle is installed with the manufacturer’s specified nailing pattern and a proper starter strip at the eaves and rakes.
Most asphalt shingle roofs in New Hampshire cost between $8,000 and $22,000. The main variables are roof size and pitch, the shingle grade you choose, how many existing layers need removing, and whether any decking has rotted and needs replacing. Complexity matters too — dormers, valleys, skylights, and chimneys all add flashing labour.
Slightly, though far less than most people expect. Attic ventilation and insulation have a much greater effect on upper-floor temperature than shingle colour does. In New Hampshire the difference is modest either way, so choose the colour that suits the house. If summer cooling is a real concern, a reflective shingle line is worth discussing.
Building code often permits a second layer, but we do not recommend it and do not do it. Overlaying hides rotted decking, traps heat that shortens shingle life, adds significant weight, and voids most manufacturer warranties. It saves money on tear-off and costs more over the life of the roof.
Less than most homeowners assume. The major manufacturers produce comparable products within each grade, and the difference between a twenty-year roof and a ten-year roof is almost always installation quality rather than brand. Correct nailing pattern, starter strip, ice-and-water shield placement, and attic ventilation matter far more than the name on the bundle.
Other Roofing Services
Roof Replacement
The full process tear off, timeline, permits, and what to expect.
View replacement →Metal Roofing
The other main option longer life, better snow shedding, higher cost.
Compare metal →Roof Repair
Leaks and lifted shingles traced to the actual source before repair.
View roof repair →Roof Inspection
Free, photo documented condition report before you decide anything.
Book an inspection →Get Your Free Shingle Roof Estimate
We will walk you through grade, wind rating, and colour options for your specific roof — then put it all in an itemized written estimate. No pressure to sign anything.