1 Total costs (materials plus shipping and labor) for installing a straight, return or L-shaped stair can run $1,300-$7,000 or more. 2  Materials plus labor for custom-built wooden stairs, such as a sweeping circular or elliptical design, can cost $10,000-$30,000 or more, depending on the size, style and type of wood.
Make another bleach solution and pour it onto the driveway. Wait 20 more minutes for the bleach to kill the mold. Rinse the driveway thoroughly with a garden hose. Prevent future mold with a borate solution. Mix 1/4 cup of borate detergent with 1 gallon of warm water in a bucket. Pour the solution onto the driveway and allow it to dry. Don't rinse it.
Wash the surface with a soap and water solution and a push broom. Rinse the surface with the garden hose. A pressure washer can be used to clean heavily soiled surfaces. Allow the driveway to dry for 24 hours, as the sealer will not adhere to a damp surface.Pour sealer into a paint tray. Dip the roller into the sealer, coating all sides of the roller pad.Roll the pad across the top edge of the paint tray to remove excess sealer.llow the driveway to dry for 24 hours, as the sealer will not adhere to a damp surface. Pour sealer into a paint tray. Dip the roller into the sealer, coating all sides of the roller pad. Roll the pad across the top edge of the paint tray to remove excess sealer.