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 stop mold from forming, try these tips: 1  Invest in a dehumidifier for damp areas. 2  Fix any leaks and address any plumbing issues. 3  Clean up spills immediately.  Let in fresh air and sunlight to help kill 1  mold. Open doors and windows to promote air circulation, especially after showering or while cooking.  Keep clothes and other fabrics dry.