TJB-INC uses modular retaining wall systems from many different suppliers so we can find just the right block for the customer. Our installers have been trained and certified as "Certified Segmental Retaining Wall (SRW) Installers (CSRWI)" by the National Concrete Masonry Association (NCMA). We do many repairs of incorrectly built walls so we know the benefits of getting it right the first time. With proper construction techniques, our walls stand the test of time and are backed by a 10-year construction warranty.