Regardless of whether you choose to sod or seed your new lawn, the preparation is identical.
Remove all existing grasses and weeds. Some people feel the need to use a herbicide however, local bylaws may establish limits on their use.
Ensure there are 4 to 6 inches of good quality topsoil. If the soil quality is questionable amend the soil with Triple Mix (1 to 3 inches).
Once the Triple Mix has been evenly spread over the area ensure that the top 4 inches of soil are loose. This can be done manually with a shovel or using a roto-tiller.
Smooth the soil using a rake to the desired level. Be sure to remove hills and depressions for a smooth lawn for years to come.
Sod
Unroll the sod in a brickwork like pattern in a manner that will result in the fewest cuts.
Sod is easiest to cut with a utility knife across the bottom.
Using a lawn roller press the sod into the soil using several passes eliminating any air pockets under the sod.
Sod planted in hot weather requires more water than sod planted in cooler weather. New lawns should be watered daily until firmly established.
Sod can be planted any time of the year from April to December.
Only use highest quality Nursery sod regardless on whether you choose to sod or seed your new lawn the preparation is identical.
Seed
Using a lawn roller roll the entire area flat.
Sow the seed at a rate of about 2-4 seeds per square inch. (about 3 kilograms per 1000 square feet)
Using a lawn roller to press the seed into the soil or lightly rake the seed into the soil do not bury the seed more than 1/8 inch.
Water daily until the lawn is firmly established do not walk on the seeded area.
Best time to seed during warm conditions as the seed needs fairly warm soil to germinate.
Only use premium quality seed that is suitable to your sun conditions to ensure best results.