Design Ideas from Allan Block Retaining Walls Design Ideas from Allan Block showcases many different ways your outdoor living space can be upgraded to a new space that can be enjoyed for years to come. Using concrete blocks to build retaining walls and two-sided patio walls, new outdoor spaces can be created or updated. Catalog includes example projects showing raised patios with pavers, custom outdoor kitchens, bbq grilling areas and outdoor rooms which are all great areas for entertaining. Included are ideas for upgrading front entryways, options on how to fix grade and slope issues in your yard, and how to use the space under a raised deck, all using retaining wall blocks. Product and installation information as well as references to the AB Estimating app and website for everything you need to get started are included.