Walkout Basement construction is a complex process and involves many steps, such as: excavation, underpinning, waterproofing, masonry and concrete construction, but it all starts with a preparation. Step #1 is to get a structural engineer assessment and drawings that will be used to apply for a building permit. We have a dedicated team of licensed engineers and architects who will help you in designing the layout of your future basement walkout.
Once we have all the documents (permits, drawings and locates) we will begin with on-site excavation. This is usually done with the help of mini excavator, however sometimes when site access is limited, and excavation done by hand. During the excavation special attention is paid to the already installed plumbing and gas lines, as well as all underground utilities.
New concrete footings are formed and poured to create foundation for new walls. In most cases existing foundation wall of the house is underpinned to protect it from frost exposure.
Next step is to build new walls, we prefer a cinder block construction vs poured concrete due to simplicity of installation. Walls are reinforced with re-bars and block lock and are filled solid with concrete. After that it’s time to form and pour new concrete steps and walkout landing. Construction of concrete stairs is an important task and requires professional and experienced concrete contractors.
Our professionals know the depth and width of the steps for them to be both comfortable and visually appealing. A well designed staircase with high grade concrete finish will last a lifetime. Next step is to cut out a new door opening and install lintel to carry the load
Final step is to waterproof new walls, we always use only a top rated products like: blueskin WP200, Aqua-Bloc 720-38, DELTA MS membrane. 4” weeping tile pipe is installed on perimeter of the walkout and is connected to existing weeper or walkout drain. Walkout drain is connected to a storm drain system or a sump pump. This system keeps walls and foundation protected for many years to come.