Make Preparations
Making preparations can actually be the hardest part of sodding. If you are planning on a large lawn, you might want to do it in sections. You should start by taking care of the worst areas that are probably quite visible. You can always do other areas later on in the following year. This will help you manage the project and watering will be easier to do, especially if you do not have a sprinkler system.
If you do not know how to kill and remove the old lawn, there are several options. You can use a herbicide or use various equipment. In most cases, equipment is easier and the best way to tackle it because herbicides can harm your kids and pets. For larger lawns, you might consider renting out a sod cutter. It will cut under the grass so you can easily pull up strips of turf. The best time is when the lawn soil is still wet or moist.
For smaller lawns, a grape hoe often called a grub hoe is a great tool. If you are strong or have someone to help you get rid of chunks of turf, you can remove up to 300 sq. ft in an hour.
Once you are finished removing weeds and grass, you should contact your Cooperative Extension Service and get the soil tested. They will let you know where to send the sample. Once the soil is tested, they can give you recommendations regarding the modifications for the soil to help your new lawn. While waiting for the results, you could address existing grade issues.
The first step for grading, make sure the ground slopes away from your home in all directions and drops at least 2 or 3 inches for every 10 feet. The finished grade should be level with other installations in your yard such as walkways, patios, as well as areas that will not be replanted. When replanting seed, the grade should be one inch lower than other fixtures in the yard. If you are adding sod, the grade should be 2 inches lower than the other installations such as the walkway.
Removing old turf, grade the entire area with a wide landscaping rake. If you plan to add other improvements, you should go by the recommendations given to you from the soil test results. Be sure to till the soil at a depth of 6 inches. To create a firm surface for sod or seed, roll the area with a lawn roller that is approximately 1/3 filled with water. Continue rolling until you can walk on the surface.
Create your own turf-cutting tool by sharpening the edges of a mason's trowel with a metal file. To regrade an area, remove the topsoil from the area. Make adjustments to the subsoil by scraping down high areas and filling in low areas. Spread out 2 inches of saved topsoil over the subsoil then till the first 2 inches of the subsoil. It can prevent drainage issues between the two layers of soil. Lastly, spread the rest of the topsoil another 4 inches. Use a landscaping rake to work the topsoil to the correct grade. At this time, you can add fertilizer, organic matter, and lime or sulfur. Make sure the improvements are in accordance with the results from your soil test. Be sure the added materials are spread evenly then till to the top 6 inches of soil. Rake until the area is smooth. Remove any stones and vegetation on the surface during tilling. Once you are pleased with the results, water the ground and check for puddles. Once the soil is dry enough to be worked, move the soil from the higher spots to the lower spots. Roll the prepared soil, whether for seeding or sodding, to form a firm base. If seeds are planted too deeply, the plants could die before they make it to the surface.
Fill your lawn roller around 1/3 full with water and roll it until your footprints on that area are only ½ inch deep. To finish the preparations, water deeply for two days before planting.