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.
To prevent the spores from spreading to other areas of your home during cleanup, the area should be isolated from the rest of the space with 4-6mil plastic sheeting, it is best to maintain a negative pressure in the masked off area so that mold spores cannot migrate to the rest of the living area.pray the black mold with the solution and scrub it with a scrubbing brush. Rinse with clean, warm water. 1  After rinsing the solution away, spray the area with the baking soda solution again and let it dry naturally. 2  This will help kill remaining mold.