Business Details
28 Years
experience
Open 24/7
always available
Trusted Roofing & Siding Experts in Oakland County, MI
Grennan Construction, a family-owned and operated company founded in 1998 by Fred and Phil Grennan, has built a reputation for honesty and integrity in Oakland County and surrounding areas. With over 25 years of combined experience, we specialize in residential roofing, siding, windows, and exterior remodeling, prioritizing personalized service and tailored solutions. As a James Hardie Elite Preferred Contractor, we deliver premium materials and expert craftsmanship, backed by industry-leading warranties and a commitment to customer satisfaction. Our team treats every project with meticulous attention to detail, ensuring homes are protected, energy-efficient, and aesthetically enhanced.We pride ourselves on transparent communication, competitive pricing, and community involvement, supporting local causes like the American Foundation for Suicide Prevention. From initial consultation to final inspection, Grennan Construction guarantees quality workmanship, timely completion, and a stress-free experience through flexible financing options. Our dedication to excellence has earned us recognition as Oakland County's Best of the Best for roofing, siding, and windows, serving Southeast Michigan with unmatched professionalism and reliability.
Services
Roofing
Siding Installation
Window Replacement
Gutter Protection
Masonry Repairs
Exterior Remodeling
Hail Damage Repair
Concrete Repair
Stucco Repairs
Cultured Stone Veneer
Details
- Year established: 1998
Highlights and features
- We are a James Hardie Elite Preferred Contractor, one of only 7 in Michigan.
- Over 25 years of combined experience in residential roofing and siding.
- Offer free estimates and flexible financing through Hearth for affordable payments.
- Backed by industry-leading warranties on materials and workmanship.
- Recognized as Oakland County's Best of the Best for roofing, siding, and windows.
Associations and certifications
- James Hardie Elite Preferred Contractor
What people say
Excellent service
Reasonable prices
Outstanding masonry
Timely completion
Professional crew
Services
Roofing
Grennan Construction provides comprehensive roofing solutions, including installations, repairs, and hail/wind damage restoration. Using premium materials from CertainTeed, GAF, and Owens Corning, we ensure durable, weather-resistant roofs. Our team addresses leaks, shingle damage, and ventilation issues while enhancing home value and energy efficiency through expert craftsmanship and manufacturer-backed warranties.
Siding Installation
As a James Hardie Elite Preferred Contractor, we specialize in fiber cement, vinyl, and wood siding installations. Our solutions improve curb appeal, energy efficiency, and pest resistance. We offer tailored consultations to match materials with homeowner preferences, ensuring long-lasting protection against Michigan's climate while maintaining aesthetic harmony with property architecture.
Window Replacement
We install energy-efficient windows that reduce utility costs and enhance home comfort. Our selection includes double-hung, casement, and bay windows from top brands. Certified technicians ensure precise measurements, seamless installation, and removal of old units, prioritizing thermal performance and noise reduction while maintaining structural integrity during the process.
Gutter Protection
Our Leaf Relief gutter guards by PlyGem prevent debris buildup while maintaining water flow. Designed for Michigan's weather, these systems reduce maintenance needs and prevent water damage to foundations. Installation ensures seamless integration with existing roofing systems, offering invisible protection that preserves gutter functionality and extends lifespan without compromising aesthetics.
Masonry Repairs
Expert masonry services cover brick chimneys, fireplaces, walls, and stonework repairs. We address cracks, erosion, and structural issues using traditional techniques combined with modern materials. Our team restores both functionality and visual appeal, offering tuck pointing, concrete repair, and cultured stone veneer applications to enhance durability against weathering and wear.
People
Fred Grennan
Owner
With over 25 years in construction, Fred Grennan co-founded Grennan Construction in 1998. Known for his hands-on approach, he prioritizes customer relationships and quality craftsmanship. Fred's expertise in exterior remodeling and commitment to community service have driven the company's growth into Oakland County's leading roofing and siding provider.
Questions
Why is roofing maintenance important?
Regular maintenance prevents costly repairs by addressing issues like leaks, shingle damage, and ventilation problems early. It extends roof lifespan and maintains home energy efficiency.
Do you offer free estimates?
Yes, we provide free, no-obligation estimates for all roofing, siding, and window projects. Contact us to schedule your consultation.
Are financing options available?
Yes, we partner with Hearth to offer flexible financing with low monthly payments and transparent terms for home improvement projects.
What areas do you serve?
We serve Oakland County and surrounding Southeast Michigan areas, including Birmingham, Bloomfield Hills, Novi, and Rochester.
How do I identify roof damage?
Look for missing shingles, attic leaks after storms, granule loss, or increased energy bills. Schedule a professional inspection for accurate assessment.
What sets Grennan apart from competitors?
As a James Hardie Elite Contractor with 25+ years of experience, we combine premium materials, certified expertise, and personalized service to guarantee customer satisfaction.
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