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While water-related pressure caused by poor drainage is one common cause of paver cracking, other factors can include ground movement beneath pavers, heavy loads and wear and tear over the pavers, and climates with constant freeze-thaw cycles. In general, pavers should be resealed every three to five years to prevent cracking.

Yes, you can put thin pavers over a concrete driveway. However, it's always best to talk to a driveway installer before starting. You'll need to ensure that the concrete below is in good enough shape to hold the pavers and that the driveway will still meet local building codes.

The answer to whether or not you need to get a permit before you start your driveway can vary widely based on local ordinances and the scope of your driveway ideas. In most urban and suburban areas, a permit is needed before building a new driveway to ensure that a homeowner is using safe materials and proper drainage practices while designing and constructing a new driveway. In some rural areas, a homeowner may not be required to apply for a permit. When building a new driveway on your own, always check with your local building department to see if you need to request a permit. When hiring a driveway contractor, verify that the right permits are being used before driveway construction begins.

Asphalt and tarmac are not the same thing. Traditional tarmac, short for tarmacadam, uses tar as a binder to hold crushed stone together. Asphalt uses bitumen—a byproduct of crude oil—to bind aggregate. Though tarmac was once a go-to for roads, asphalt has become the modern standard. And these days, most surfaces referred to as “tarmac” are actually asphalt. So, while the names may overlap, the key distinction lies in the binder—tar for tarmac and bitumen for asphalt.