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THE CV PAVING SEALCOATING PROCESS
When it’s time to sealcoat your asphalt driveway, we’ll take the necessary preparation steps to ensure efficient, quality work.
On a typical sealcoat job, the CV Paving prep crew will commonly:
Using a line trimmer, our prep crew will edge your driveway to expose the edges of the asphalt to ensure total coverage without doing any damage to the asphalt that could happen with a plastic edger.
Our walk-behind blowers combined with wire brooms rids the surface of dirt and debris, allowing for maximum adhesion of the sealer.
Any oil stains that require priming will be covered to help the sealer adhere to them. Fresh oil stains may still bleed through and should be cleaned prior to our crews coming.
We apply a cold pour, trowel grade crack filler to cracks between 1/4″ and 3/4″. There may be an extra charge for larger cracks.
Your driveway needs to remain unused for 24 hours after sealing, so our clearly visible fluorescent tape and sign will keep unwanted vehicles from ruining your beautiful new drive.
CV PAVING SEALCOATING: LEAVING NO CRACKS UNFILLED
Crack sealing is used as a first defense against pavement deterioration because it offers several important benefits. Effective crack sealing keeps water from entering and weakening the base or sub-base.
Crack sealing helps preserve the pavement adjacent to the cracks; prevents sand, stone, and dirt from making its way into open cracks causing compressive stresses; and extends pavement life by minimizing crack growth.
Proper attention to cracks will prevent problems from spreading and double the life of the pavement. Therefore, pavement repair in the early stages of deterioration will pay big dividends later by delaying costly resurfacing.
Types of Asphalt Driveway Cracks Filled
This type of crack appears primarily in resurfacing projects, although it can also occur in a new pavement. It happens when an existing crack or joint in the underlying pavement structure reflects upward through the surface.
Visually, this type of cracking forms a square pattern, with cracks intersecting each other at nearly right angles. A common cause of this on parking lots is lack of traffic, (steady traffic constantly kneads the pavement and keeps it flexible). Other causes include excessive air voids, low-penetration asphalt, or an overly high plant mix temperature.
Unlike the previous types, edge cracks appear only parallel to and within 18 inches of the edge of the pavement. Causes include poor base, lack of shoulder support, poor drainage, or frost action.
Pavement “joints” are created during initial construction when the edges of two pavement mats are placed next to one another. These constructed joints usually have a lower density of asphalt than that of the surrounding pavement. If the mats don’t bond properly (for a variety of reasons), joint cracks appear.
Slippage cracks are usually crescent-shaped and caused by heavy traffic that is stopping, turning, or climbing a hill. Resultant stresses cause a bond failure between the upper and lower pavement layers. The open end of the U-shaped crack always points in the direction of the applied force.
Over time, a flexible asphalt pavement becomes more rigid and is less able to tolerate vertical deflections. This causes tension in the pavement and results in alligator-type cracking. Such cracking can also occur from structural inadequacy, aging, and oxidation.
It is generally recommended that alligator areas be removed and replaced rather than filled or sealed.