About Us


Our Story

In 1985, Michel Deffense and business partner started producing precast concrete gravity segmented walls in the United States and Canada. Originally designed and invented in Europe by German engineer Gerhard Hagenah, Michel Deffense and partner introduced the first Hagenah concrete block walls manufactured and built in the United States. Continuing with its success, SlopeBlock was founded in 1994 to deliver the best of German engineering to American industry.

Today our story continues, as we're commited to deliver quality concrete blocks across residential, commercial and governmental customers. Our business is dedicated to simplifying and reducing the cost for your erosion prevention project through our unique SlopeBlock units.


Photo of Michel Deffense

Michel Deffense

- Founder - (805) 376-9924 michel@slopeblock.com slopeblock1@gmail.com
Photo of Sean Heathcote

Sean Heathcote

- National Sales Director - (805) 796-6765 sean@slopeblock.com

Careers & Affiliations

Your success is our success. SlopeBlock is committed helping our employees, contractors and distributors succeed. If you have any questions or believe you would be a good fit for our team or would like to become a distributor, please contact us at one of the following: