"Understanding Your Home" by Building Inspector Mark Visser
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Driveway sealing tips
*Apply when temperature is at least 7 degrees Celsius (45 degrees Fahrenheit) with no rain in the forecast (check pail label for application instructions).
*Trim grass away from edges. *Remove oil/gas spills with special detergent.
*Use crack filler for larger cracks.
*Before opening the pale with driveway sealer turn it upside down to pre-mix sealer before taking the following steps. *Sweep and hose down driveway and let dry.
*Once the pail is opened keep stirring the contents periodically to prevent the sollids from settling on the bottom of the pail.
*Apply driveway sealer with squeegee or roller in thin overlapping coats. Do NOT put on a thick coat of sealer, it will do more harm than good.
*Use empty pale, rope, sawhorses or anything else to put up a makeshift barricade to keep people and cars off the driveway for at least 24 hours.

Asphalt Driveways

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Asphalt driveways.

A single lane driveway is usually around 10 feet (3 m) wide and, where possible, with an apron of approximately 15 feet (4.5 m) wide. A wider and flared apron makes it easier for cars entering or leaving. The apron is the driveway section between the sidewalk and the street. A circular driveway has two aprons. For aesthetic reasons the apron can be made of a different material than the main driveway. Adding driveway edging can also drastically change the overall appearance of your driveway.
Asphalt has been widely used since 1920-1930. Most asphalt pavements are built on a gravel base which is generally at least three times as thick as as the asphalt layer. In areas with very soft or expansive subgrades such as clay or peat, a thicker gravel base may be required.
The actual material used for driveway paving is termed HMA (Hot Mix Asphalt).

Advantages of asphalt driveways are relatively low cost compared with other paving methods, and perceived ease of repair.
Disadvantages include less durability than other paving methods and the tendency to become slick and soft in hot weather.
Leaking car engine oil or spilled gas will soften the asphalt and cause permanent damage.

New installations. The crushed stone gravel base for asphalt driveways is normally 8"-10" (2-25 cm) thick and thicker if heavier vehicles will be parked on it. The sub-grade soil and gravel base should be well compacted.
Maintenance. To delay the formation of cracks and potholes as long as possible asphalt driveways should be sealed every one or two years, depending on the manufacturers application specifications.
Here are some reasons why driveways should be sealed:
- Cracks will allow rain water to filter down which will weaken the gravel base which will lead to potholes and ruts.
- In northern climates driveways will be damaged by freeze-thaw cycles.
- Grass will begin to grow in cracks and its roots will further weaken the asphalt.
- The sun's ultraviolet rays will 'dry out' the asphalt and do a lot of long term damage.

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