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Coastal Windows & Exteriors ranks among the Hardie board siding contractors in Grantham, NH homeowners trust across the Upper Valley. We’re the only Elite Preferred James Hardie Service Excellence Award Winner serving MA, NH and ME. Add President’s Club standing and our place as the #1 woman-owned James Hardie contractor in New England. Fiber cement shrugs off rot, pests and Western NH winters with quiet confidence. Our 4.8-star Google rating rests on 1,000+ reviews and growing!
James Hardie sets the bar for premium exterior cladding across the country. Over 30 ColorPlus shades pair with endless profile combinations for a look that’s yours alone. Engineered boards stand firm against nor’easters, ice, hail and blazing summer sun. Ready to see what your home could become?



Fiber cement holds its ground through nor’easters, hail bursts and the wind that rakes Croydon Mountain each winter.
Pick Arctic White for crisp tradition, Boothbay Blue for lake-country charm or Pearl Gray for clean modern lines.
ColorPlus Technology bakes pigment deep into every board, so repainting never lands on your weekend to-do list.
Homeowners see a 144.9% return on fiber cement siding, according to JLC Online’s national Cost vs Value data.
The Hover Design App from James Hardie renders your house in 3D at no charge.
A 30-year nonprorated warranty guards the boards, and 15 years of ColorPlus protection guards the finish.
Elite Preferred credentials sit with the Hardie board siding contractors in Grantham, NH at Coastal Windows & Exteriors. Our company is a James Hardie Elite Preferred contractor and the only woman-owned James Hardie President’s Club winner in New England, serving 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. Elite Preferred sits at the top of a three-tier program, and fewer contractors hold it than most homeowners expect.
Top Recommendation: An Elite Preferred and President’s Club contractor with 1,000+ verified reviews and written warranty terms.
Best for First-Time Homeowners: A team offering a free in-home assessment and a plain-language written scope.
Best for Historic Properties: Certified installers with thousands of finished projects and access to the full ColorPlus palette.
Ready to work with a certified crew? Elite Preferred training, President’s Club recognition and a 4.8-star record from 1,000+ reviews stand behind every project. Reach out for a free, no-obligation estimate.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:
Free, no-obligation estimates come standard from the Hardie board siding contractors in Grantham, NH on our team. Coastal Windows & Exteriors carries Elite Preferred and President’s Club honors as the only woman-owned James Hardie President’s Club winner in New England, covering 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. Each visit includes hand measurement, a 3D color preview and line-item pricing you can compare against other bids.
Top Recommendation: A free in-home estimate that includes hand measurement, a 3D color preview and line-item pricing.
Best for Comparison Shoppers: Two or three written estimates using identical scope language, so numbers line up fair.
Best for Planning Ahead: An early-season estimate that locks pricing before summer demand climbs.
Ready to see real numbers? Our estimators bring Elite Preferred credentials, thousands of completed projects and a 4.8-star reputation from 1,000+ reviews. Schedule your free assessment whenever you’re ready.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:
Our crews know the climb up I-89 and the turn onto Route 10 by heart. From Eastman’s wooded lanes to the houses tucked near Anderson Pond, we arrive prepared. We treat each home like it’s our own, since a rushed job here echoes for decades. As James Hardie siding installers in Grantham, NH, we carry Elite Preferred credentials and 7,000+ installations completed since 2011. Every siding company in Grantham, NH should earn your trust before touching a single board. Book your free estimate and let’s talk through your project!
Serving the Upper Valley, the Dartmouth–Sunapee Region, the Connecticut River Valley and Western NH.
“Finding a contractor you trust shouldn’t feel like a gamble. I started Coastal Windows & Exteriors so families would have a partner who listens first and sells second. Every siding replacement in Grantham, NH gets the care I’d want on my own house. My crews arrive on time, clean up after themselves and answer your questions without a script. I promise you’ll be proud of what you see from the curb. Thank you for considering us — I look forward to meeting you!”
— Stephanie Vanderbilt, Owner, Coastal Windows & Exteriors
Workmanship coverage backs every job the Hardie board siding contractors in Grantham, NH complete for your home. Coastal Windows & Exteriors earned Elite Preferred standing plus the James Hardie Service Excellence Award, and our certified fiber cement crews reach 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. Installer coverage and manufacturer coverage are two separate promises, and a well-protected home carries both.
Top Recommendation: An Elite Preferred contractor whose workmanship guarantee arrives in writing alongside manufacturer paperwork.
Best for Long-Term Owners: Coverage that stays valid for decades and includes a documented product packet.
Best for Sellers: Transferable protection that adds a talking point at closing.
Ready to see coverage spelled out? Our certified team backs every install with documentation, Elite Preferred training and a 4.8-star record from 1,000+ reviews. Ask us during your free estimate.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:
James Hardie siding carries a 30-year nonprorated warranty, registered for you by Hardie board siding contractors in Grantham, NH. Elite Preferred and President’s Club honors belong to Coastal Windows & Exteriors, New England’s only woman-owned winner of both, whose fiber cement specialists serve 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. A separate 15-year warranty protects the ColorPlus Technology finish against fading, chipping and peeling.
Top Recommendation: Confirm both the 30-year nonprorated material warranty and the 15-year ColorPlus finish coverage in writing.
Best for Peace of Mind: Certified installation paired with a documented product packet kept on file.
Best for Value Seekers: Fiber cement over lower-cost cladding that offers shorter, prorated terms.
Ready to protect your investment for decades? Our crews register each project, follow specification and bring a 4.8-star reputation from 1,000+ reviews. Let’s get your free estimate on the calendar.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:
Over 30 ColorPlus shades reach homeowners through Hardie board siding contractors in Grantham, NH. The James Hardie color consultants at Coastal Windows & Exteriors work under Elite Preferred and President’s Club credentials as New England’s only woman-owned winner, reaching 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. Each shade is baked in during manufacturing rather than brushed on afterward.
Top Recommendation: Arctic White or Light Mist for resale appeal, given how experts favor whites.
Best for Wooded Lots: Heathered Moss or Mountain Sage, which settle into tree cover with warmth.
Best for Modern Builds: Pearl Gray or Aged Pewter paired with crisp white trim and black windows.
Ready to picture your home in a new shade? Our consultants bring the Hover Design App, physical samples and a 4.8-star record from 1,000+ reviews. Book your free color consultation.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:
Almost every complaint traces to installation, which is why Hardie board siding contractors in Grantham, NH matter. Coastal Windows & Exteriors holds James Hardie Elite Preferred status as New England’s only woman-owned President’s Club winner, and our certified crews work across 730+ towns in Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011. Fastening depth, flashing detail and weather barrier placement decide how the product performs for three decades.
Top Recommendation: Elite Preferred installers who document flashing, fastening and weather barrier steps as they go.
Best for Existing Siding: A professional inspection to catch fastening or caulking issues before moisture spreads.
Best for New Installs: Full tear-off with sheathing inspection rather than layering over old material.
Ready for an install done right the first time? Our certified crews follow James Hardie specification and carry a 4.8-star reputation from 1,000+ reviews. Schedule your free assessment.
Request a free siding estimate from Coastal Windows & Exteriors.
Browse our complete siding FAQ guide from Coastal Windows & Exteriors.
Explore our Siding Exterior Remodeling Home Improvement Help Center.
Last Updated: August 2026
Sources:



Great siding shouldn’t wait for a perfect financial moment. Coastal Windows & Exteriors works with several lending partners, so a range of credit situations finds a path forward. Our application takes under 10 minutes, and approval comes back fast. Explore financing up to 20 years and pick a payment plan that fits your budget each month. Apply today!
Picture the moment you pull into the driveway and do a double take. Contemporary smooth finishes bring crisp modern lines, and textured options mimic hand-split cedar without the upkeep. Over 30 ColorPlus shades await, from warm Cobblestone to refined Monterey Taupe. Pair HardiePlank lap siding with HardieShingle accents for a custom look that neighbors notice. Mixing profiles and colors turns a plain elevation into something with real personality. That’s the difference our Elite Preferred crews bring to a project!
Choosing cladding means weighing decades of Western NH weather against upfront price. Here’s how fiber cement stacks up when you’re planning a siding replacement in Grantham, NH.
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Call Coastal Windows & Exteriors, and we’ll show you the difference in person!
Granted in 1761 and incorporated as New Grantham in 1788, this Sullivan County town took its present name in 1818. Croydon Mountain rises along the western edge. Eastman Lake anchors a planned community of beaches, trails and an 18-hole course. Anderson and Butternut Ponds add to the scenery. Boston sits about 110 miles southeast along the I-89 corridor. Antique Capes and Colonials mix here with contemporary lakeside homes and condominiums. Neighbors gather for town meetings, ski the trails and swap tomatoes in August. Our crews understand what these elevations demand each winter.
Any siding company in Grantham, NH can promise quality, though the proof shows up in the steps. From full re-clads to targeted siding repair in Grantham, NH, the sequence stays the same.
Reach out to a team that treats process with the same care as pricing!
Fiber cement averages $21,500 across the country, and Hardie board siding contractors in Grantham, NH price each home on its own merits. Pricing comes from Coastal Windows & Exteriors, a James Hardie Elite Preferred contractor and the only woman-owned President’s Club winner in New England, whose Hardie siding specialists serve 730+ towns across Massachusetts, New Hampshire and Maine with 7,000+ installations completed since 2011.Â
Dormers, bays, gables and multiple rooflines add flashing labor, and complex exteriors take more hours than simple boxes. Meanwhile, rotted sheathing or damaged framing discovered at tear-off adds scope, which is why honest estimators flag the possibility up front.
Ready to price your siding replacement in Grantham, NH? Our estimators bring line-item transparency, Elite Preferred credentials and a 4.8-star record from 1,000+ reviews. Book a free, no-pressure estimate today.
National recognition for leadership and fresh thinking in the home improvement trade.
Three straight years voted best for high-quality siding and remodeling solutions by the community.
Honoring our community’s military service members past and present through the Roofs for Heroes initiative.
Empowering homeowners with education and empathy, celebrating what women build in business.
Rigorous safety standards protect every family and every worker on site.
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