Business Details
46 Years
experience
Expert Roofing & Building Enclosure Solutions in Alexandria, VA
Seal Engineering, Inc. has been a trusted leader in civil and structural engineering since 1980, specializing in roofing, waterproofing, and building enclosure systems. Our team of licensed professionals combines meticulous investigative work with innovative design solutions to address moisture migration challenges in both historic and modern structures. With over 10,000 completed projects, we serve federal agencies, private property owners, and institutions across the United States and internationally. Our expertise in preserving landmark buildings like the White House and U.S.Capitol demonstrates our commitment to technical excellence and long-term building integrity. We maintain rigorous quality control standards while prioritizing sustainability and system longevity in every project we undertake.
Services
Roof Replacement
Waterproofing
Facade Repair
Building Enclosure
Structural Engineering
Design-Build Services
Condition Assessments
Historic Preservation
Construction Inspection
Moisture Analysis
Details
- Year established: 1980
Highlights and features
- 40+ years of specialized experience in building enclosure systems
- Completed over 10,000 projects including historic landmark preservation
- Thorough investigative process with third-party design verification
- Licensed engineers in Virginia, Maryland, DC, and West Virginia
- Rigorous quality control program with dedicated QA/QC principal
Services
Roof Replacement
Our roof replacement services combine structural analysis with material science expertise to deliver durable solutions for historic and modern buildings. We conduct comprehensive condition assessments before developing customized replacement plans that maintain architectural integrity while meeting current building codes. Our engineers specialize in complex roof systems including mission tile, flat roofs, and copper-clad domes, ensuring long-term protection against moisture intrusion while preserving each structure's unique character.
Waterproofing
We provide advanced waterproofing solutions for building envelopes, plazas, and subterranean structures. Our approach begins with nuclear moisture surveys and controlled water testing to identify vulnerabilities. We design multi-layer protection systems that integrate with existing building components, focusing on critical transition points like parapets and penetrations. Our solutions balance technical performance with sustainability considerations, including energy-efficient materials and vegetative roof systems that meet LEED certification requirements.
Facade Repair
Our facade repair services address deterioration in historic masonry, terracotta elements, and modern cladding systems. We employ non-destructive testing methods to assess structural integrity before developing repair programs that maintain original aesthetics. Specialized in restoring monumental skylights and ornamental features, our engineers create detailed drawings that respect historic construction methods while incorporating modern durability enhancements to extend service life.
Building Enclosure
We specialize in comprehensive building enclosure systems that control moisture, air, and thermal movement. Our services include forensic analysis of existing systems, design of high-performance enclosures for new construction, and retrofit solutions for aging structures. We focus on system integration points where failures commonly occur, developing details that provide redundancy and constructability. Our expertise extends to energy conservation strategies that reduce operational costs while maintaining structural integrity.
Design-Build Services
Our design-build approach combines technical expertise with practical constructability considerations. We collaborate with architects and contractors to develop cost-effective solutions that meet performance requirements while maintaining schedule efficiency. Our services include preparation of bid documents, contractor qualification, and construction phase oversight. This integrated approach ensures seamless implementation of complex repair and replacement projects, particularly for occupied or historic structures with unique access challenges.
People
David A. Fyffe
Principal Engineer
Licensed in four jurisdictions with extensive experience in building envelope systems, David leads evaluations and designs for historic structures while managing company resources effectively.
David J. DiQuollo
Quality Control Principal
With expertise in building envelope components, David oversees quality control and provides technical review for government and commercial projects across multiple states.
Lisa DiGiulio
Business Operations Manager
Lisa manages day-to-day operations, ensuring efficient delivery of engineering services while maintaining client relationships and internal processes.
Michael A. Harris
Senior Project Engineer
Experienced project manager with technical expertise in building enclosure systems, overseeing complex repair and replacement projects from design through construction.
Peter D. Fyffe
Project Engineer
Licensed engineer with specialized knowledge in building envelope components, contributing to investigative work and design solutions for diverse structures.
Questions
What types of buildings do you specialize in?
We work on historic landmarks, government buildings, universities, and commercial properties, with expertise in both modern and heritage structures.
How do you handle complex historic preservation projects?
Our team combines traditional construction knowledge with modern engineering techniques to preserve architectural integrity while ensuring structural safety and longevity.
What regions do you serve?
While based in Alexandria, VA, we operate throughout the Mid-Atlantic region and have completed projects nationwide and internationally.
Can you assist with emergency building assessments?
We prioritize life safety concerns and provide urgent evaluations for critical building envelope issues requiring immediate attention.
What sets your waterproofing solutions apart?
Our approach combines forensic analysis with customized system design, focusing on failure point redundancy and long-term moisture control performance.
Do you work on new construction projects?
Yes, we provide building enclosure design services for new construction, emphasizing energy efficiency and constructability while preventing moisture intrusion.
