Our Story

We redefine, design, create, provide construction solutions that bring people together with a quality over profit mindset.

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Wayne Avenue: Alamo

spanish tile roof system, half round gutters and downspout |  alamo, ca

Diablo Country Club: Alameda/El Nido

spanish tile roof system, half round gutters and downspout |  alamo, ca

Orinda Farm House: La Campana

Selected Projects

Our Contact

Across 30 years of experience, and expertise across the two generations of family owned company. 3,000+ roofing, waterproofing, gutter, and construction projects across the Bay Area. Licensed, bonded, and insured.

CSLB License #1119947 —Google Business Profile — Our Selected Project Maps

DE Group Roofing and Waterproofing Corporation (DE Group) is a specialized construction roofing and waterproofing entity, which promotes roofing and waterproofing solutions, design, and advisory services. As a privately owned organization focused exclusively on advancing innovative solutions, it invests heavily in development to create novel approaches, often collaborating with partners to translate concepts into practical applications across key areas in adjacent areas of the engineering and construction industries.

Please be advised: All products, materials, systems, and services provided by DE Group—including those related to commercial and residential roofing, waterproofing, gutter systems, and associated construction solutions are strictly for licensed contractor or professional use only. They are not intended, approved, or suitable for consumer/DIY applications, personal residential use without professional oversight, or any unauthorized purposes.

These offerings, including roofing membranes (such as TPO, PVC, Torch-Applied, EPDM, composition shingles, and tile systems), waterproofing solutions, and related installation services, should only be handled, specified, procured, or installed by qualified professionals in compliance with applicable building codes, manufacturer guidelines, OSHA regulations, and industry standards. Improper use, handling, or application may result in structural damage, leaks, safety hazards, voided warranties, or non-compliance with local requirements.

This website is designed for people seeking information about DE Group’s business and contains information on initiatives and solutions which are targeted to a wide range of audiences and could contain details or information otherwise not accessible or valid in your country. Please be aware that we do not take any responsibility for accessing such information which may not comply with any legal process, regulation, registration, or usage in the country of your origin.

The material contained on this website is not intended to be investment or advisory advice, does not constitute a solicitation to engage our services or form a professional-client relationship, and is not provided in a fiduciary capacity.

This material is provided for informational purposes only and is not intended to be relied upon as a forecast, guidance, or a recommendation to pursue any specific strategy or course of action. The opinions expressed are subject to change at any time without notice. References to specific matters, methodologies, projects, or data are for illustrative purposes only and are not intended to be and should not be interpreted as recommendations or endorsements. The information provided does not take into account the specific objectives or circumstances of any particular individual or entity, or suggest any specific course of action.

This material may contain forward-looking statements that are not purely historical in nature. Such statements may include, among other things, projections, forecasts, or estimates regarding outcomes, regulatory developments, or potential strategies. Moreover, any historical case studies or outcomes managed by DE Group and/or its affiliates (together, “DE Group”) included in this material are presented by way of example only. No representation is made that any outcome presented will be achieved, or that every assumption made in achieving, calculating, or presenting either the forward-looking statements or the historical outcomes herein has been considered or stated in preparing this material. Any changes to assumptions that may have been made in preparing this material could have a material impact on the results presented herein by way of example. Past results are no guarantee of future outcomes.

Decisions should be made based on an individual’s or entity’s objectives and circumstances and in consultation with their own professional advisors.The information provided does not constitute a solicitation of an offer to provide services, or an offer to provide services in any jurisdiction to any person or entity to whom it is not lawful to make such an offer or service.

The information and opinions contained in this material are derived from proprietary and nonproprietary sources deemed by DE Group to be reliable, are not necessarily all-inclusive, and are not guaranteed as to accuracy or completeness.

THIS MATERIAL IS NOT TO BE REPRODUCED OR DISTRIBUTED TO PERSONS OTHER THAN THE RECIPIENT.

DE Group is an innovative construction firm advising a diverse portfolio of clients across engineering and construction industries. We specialize in complex roofing and waterproofing, and regulatory matters, as well as complementary practices that demand strategic, cross-disciplinary insight and flawless execution.

NOT PROFESSIONAL ADVICE. PRIOR PROJECT RESULTS DO NOT GUARANTEE A SIMILAR OUTCOME.

No warranty or guarantee of performance; roofing and waterproofing outcomes depend on site conditions, materials, installation quality, weather, and other variables.

DE Group, Inc.

Phone                                              O:+1 925-940-7099

General Inquires                                           hello@degroupusa.com

Address                                           1990 N California Blvd, 8th Floor, Suite #1270, 
Walnut Creek, CA 94596, United States of America

2261 Market Street,                         San Francisco, CA 10016, United States of America

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