William Giakoumatos
President
For more than 25 Years, William Giakoumatos has helped homeowners make informed decisions about protecting and improving their homes. As President of American Custom Contractors, he oversees company operations, quality standards, customer experience, and the technical accuracy of the educational resources published on the company’s website.
Since joining the family business, William has worked closely with homeowners throughout Maryland, Washington, DC, Northern Virginia, West Virginia, and Pennsylvania, helping them navigate roof replacements, storm damage restoration, siding projects, window replacements, and exterior renovations.
His approach is simple: provide honest recommendations, explain every option clearly, and help homeowners choose the solution that’s best for their home.
Areas of Expertise
William regularly advises homeowners and oversees projects involving:
- Residential roof replacement - including natural slate, natural cedar, synthetic slate & cedar, and copper systems
- Storm damage restoration and insurance claims management
- Exterior Design and Planning
Professional Experience
Throughout his career, William has helped guide thousands of exterior remodeling projects, with a focus on craftsmanship, communication, and long-term value.
His responsibilities include:
- Maintaining installation quality standards
- Evaluating new building products & working with manufacturer representatives
- Improving homeowner education resources
- Reviewing technical content published on company website
Certifications & Industry Knowledge
American Custom Contractors maintains relationships and certifications with many of the industry’s leading manufacturers.
William works closely with products and installation systems from companies and organizations including:
Industry Involvement
William believes that continuous education is essential to delivering exceptional workmanship and trusted guidance to homeowners. He has organized specialized training with the Slate Roofing Contractors Association to ensure our team is equipped with the highest level of installation knowledge and craftsmanship. He also coordinates ongoing education with our manufacturing partners to keep both our sales and installation teams current on the latest products, installation standards, and best practices, while leading the company’s insurance restoration training initiatives.
To ensure American Custom Contractors remains at the forefront of the industry, William regularly stays current through:
- Product Certification Updates
- Best Practices and Emerging Installation Techniques
- Manufacturer Training Programs
Community Involvement
American Custom Contractors has proudly served homeowners since 1972, and William believes giving back to the communities the company serves is just as important as delivering quality workmanship. He has led organization involvement with Habitat for Humanity and the Owens Corning’s Roof Deployment Project.
Editorial Role
William reviews educational content published by American Custom Contractors for technical accuracy and consistency with current industry practices.
Content may be reviewed for:
- Roofing systems
- Siding installation
- Window replacement
- Storm damage restoration
- Exterior remodeling
- Manufacturer recommendations
- Product comparisons
- Homeowner maintenance guidance
Articles reviewed by William display a “Reviewed by William Giakoumatos” attribution and are updated as industry standards, products, or best practices evolve.
Recent Articles Reviewed
- Article