New Hampshire concrete rarely fails from the bottom up. It fails from the top down, one freeze at a time. Water soaks into the face of a slab, freezes overnight, expands and takes a thin layer off with it. Do that forty or fifty times between November and April, add the salt and sand that comes off the town road, and a driveway in Concord or Laconia scales and pits long before the slab underneath is finished.

Tearing it out is the expensive answer. Demolition, disposal, a new pour and then a cure period that swallows a chunk of a season we do not get much of up here. Resin bound resurfacing skips most of that. Where the concrete underneath is still structurally sound it stops being the problem and becomes the base for a new surface laid straight over the top of it.

There is no Resin Rock depot in New Hampshire. The state is served through our New York distribution point and the wider regional network, so material is freighted in rather than picked up the same morning. That shapes how a job gets scheduled here more than it shapes what it costs. A well organized installer books your date around a confirmed delivery, not the other way round.

Concrete is porous, which means it drinks. Rain, snow melt and salted slush go into the face of the slab and sit there. When that water freezes it expands and the only place for it to go is out through the surface. New Hampshire does not freeze once in December and hold until March. The temperature crosses freezing again and again all winter, so the top of the slab is worked over and over until it scales, pits and sheds.

Underneath, the ground here is anything but uniform. Much of the state sits on granite ledge with pockets of glacial till and silt around it. Ledge does not move. The soil beside it does. That difference is what produces the cracks that run at an angle across a driveway, the corner of a garage apron that has dropped half an inch, and the walk that lifts at one joint every spring and settles back most of the way in June.

Then there is the plowing. A steel plow edge dropped on a slab all winter chews the surface, catches lipped joints and tears out the weak edges. On a steep camp driveway the meltwater that runs down the slope in February refreezes at the bottom, so the flattest and most used part of the drive is also the iciest and the first to fail. None of that is fixed by a paint on coating or a thin skim topping.

Resin bound is a mixed-on-site surface. Aggregate and a two part UV stable resin go into a forced action mixer at an exact ratio, and the resulting blend is troweled over your existing concrete at depth. It cures into a single seamless, porous sheet.

People confuse it with resin bonded, and the two behave nothing alike. Bonded work scatters dry stone onto a resin coat, so the surface is textured, sheds loose grit and holds water on top. Bound work carries the resin all the way around every stone, which is what makes it flat, fixed and free draining.

The practical result in New Hampshire is that you keep your slab, lose the cracked and stained surface on top of it, and gain something that handles rain by absorbing it rather than pushing it toward your foundation.

Two questions decide whether an exterior surface survives here. Can water get out of it before it freezes, and what happens when salt lands on it. Resin bound answers the first one directly, because it is a fully permeable surface. Rain and snow melt drain through the stone matrix and into the sub base instead of sitting in the face of the slab waiting for the overnight low. Where the sub base is porous and correctly compacted, the whole build up works as permeable paving.

On salt, be realistic. Nothing outdoors likes de-icing chemicals and anyone claiming immunity is selling. What resin bound does is put a cured resin skin around every stone and over the concrete beneath it, so salt is not soaking into bare slab. Winter care matters more than people expect. Use a poly or plastic shovel rather than a steel edged one. If you plow, fit a rubber or poly cutting edge and set the blade slightly high on skids. Use de-icer sparingly rather than by the scoop, and clear snow before traffic packs it down.

Resin Rock carries more than 30 aggregate blends drawn from quarries around the world, screened so bag matches bag. Quartz gives you clean, bright, consistent color. Granite reads more natural and hides dust well. Marble runs lighter and cooler underfoot, which people like around pools. Basalt goes dark and modern.

Lighter blends stay noticeably cooler in direct sun, which is worth thinking about for a pool deck you walk barefoot. Darker blends hide tire marks better on a driveway. Most homeowners land on a mid tone blend that does both jobs reasonably well.

For feature work, Glow Rock from Glow Surfaces charges in daylight and glows softly after dark. It is used as a pathway edge, a pool surround border or a driveway inlay rather than a whole surface.

Fifteen years and up is a realistic life on a properly installed surface, and looking after it is mostly a matter of keeping the pores open. Leaves, grass clippings and dust are what clog a permeable surface, so a blower or a stiff yard brush every few weeks does most of the work. A wash down once or twice a year handles the rest.

When you jet wash, use a wide fan tip and keep it a foot back. A turbo nozzle held close will strip resin off the top of the stone, and so will a wire brush or a strong solvent. Warm water and a soft brush deal with almost every spill. Nothing grows up through the surface, but seed can root in debris left sitting on it.

If a section ever does get damaged, resin bound is repairable. An approved installer can cut out and relay a patch using the same blend rather than replacing the whole surface.