How to Build a Walk Out Basement. With a walk-out basement, part of the basement is below ground and the wall where the door is located is above ground. Walk-out basements are built on sites that are on hills or steep slopes.
Build a Walk-Out Basement in a New Home
Call your municipality's building department to check for basement requirements. They may require a specified number of outside exits for the basement to be considered habitable. Find out what the footer and foundation requirements are.
Measure the height of the foundation, footer, floor and basement space. Measure the slope of your lot. Calculate the change to the topography. Draw up a topography plan.
Draw up plans. Bring them to your building department when you apply for a building permit. Schedule inspections.
Excavate to the required depth.
Pour the concrete for the slab. Decide whether to use concrete or cinder block for the foundation. If using concrete, build a form for basement walls that includes a door entry. Attach it to the concrete according to your building department's requirements.
Mix the concrete according to the manufacturer's directions. Pour concrete or build the walls with cinder block.
Choose a door for the entrance. A sliding door that opens onto a deck is a common feature of walk-out basements. Install the door according to manufacturer's directions.
Build a Walk-Out Basement in an Existing Home
Talk to your municipality's building department to determine whether you can build a walk-out basement. Find out what the requirements are for headers, bracing and supports.
Decide whether you want to build a walk-out basement or just a set of doors to enter and exit the basement. The latter will be less expensive and easier to install.
Measure the area where the door will be installed. Mark the edges with stakes. Remove the soil with a backhoe.
Select a door unit. A pre-cast concrete stairwell and door unit is the easiest to install. Decide whether you want to have the unit installed or do it yourself.
Hire a qualified foundation contractor to cut through the concrete or block and install the proper bracing and supports.
Lower the door unit into place. Bolt the frame to the concrete.
Caulk around the door frame. Paint the door with metal enamel.
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