Winter Care for a Resurfaced Driveway or Pool Deck in West Kelowna
Most of what is written about maintaining resurfaced concrete was written for places with a single long freeze. The Central Okanagan does not work that way. West Kelowna spends much of December through February cycling above and below zero, sometimes within the same day, and that cycling is harder on a surface than a steady cold would be.
If you have had a driveway, pool deck, walkway, front steps or garage floor resurfaced, the first winter is when good habits get set. Here is what actually matters.
What freeze and thaw does
Water gets into any porosity in a surface, expands roughly nine percent when it freezes, and pushes. Once. That is survivable. The problem is doing it forty times a winter.
On bare concrete, that repeated push is what causes spalling, the flaking and pitting that takes the top layer off a driveway. On a coated or resurfaced surface, the coating's job is to keep water from getting into the concrete in the first place, which is why the coating's integrity, and particularly its edges and its topcoat, is what you are protecting through winter.
Two consequences follow:
1. Standing water is the enemy, not cold. A surface that drains and dries between cycles is in far better shape than one that holds a puddle.
2. Anything that abrades or chemically attacks the topcoat shortens the surface's life, because the topcoat is the water barrier.
De-icers: what is safe and what is not
This is where most winter damage happens, and the differences are real.
Generally the safest choice: none. Sand or a fine grit gives traction without any chemistry. It needs sweeping up in spring and it will track indoors, but it does not attack anything.
Common de-icers, in rough order of harshness:
- Sodium chloride (rock salt). Cheap and widely sold. It works down to a limited temperature, and below that it stops melting but keeps drawing moisture into the surface. It is also corrosive to any exposed rebar, metal railings and vehicle undersides.
- Calcium chloride and magnesium chloride. Work at lower temperatures, and often marketed as gentler. They still leave a residue that holds moisture and they can be aggressive on some coatings.
- Ammonium sulphate or ammonium nitrate based products, sometimes sold as fertilizer style ice melts. These are the ones to avoid entirely on any concrete surface.
- Urea. Often marketed as pet safe and concrete safe. Milder, but it is a fertilizer and runoff into a lawn or a pool area is its own problem.
The practical rule for a coated surface: ask your installer, in writing, which products their warranty permits. Coating systems differ, and a product that is fine on one is not fine on another. If you cannot get an answer, use sand.
Whatever you use, sweep the residue off once the ice is gone rather than leaving it to sit and pull moisture back in.
Shovelling without damaging the surface
- Use a plastic or poly blade, not steel. A steel edge dragged across a decorative topcoat will leave marks, and on textured aggregate surfaces it can catch.
- Consider a rubber edged blade if you shovel often.
- Never chip at ice with a metal tool. If ice has bonded, wait or use sand for traction. A chisel or the corner of a steel shovel will take the coating with the ice.
- Watch the snowblower skid shoes. If they are set too low, the auger housing rides on the surface. Raise them, or fit poly shoes.
- Push, do not scrape. Clear early and often rather than letting a thick layer pack down into ice.
If you hire a plow service, tell them in advance that the driveway is coated, and ask for rubber or poly edged equipment. Most operators can accommodate that if they know before the first snowfall.
Getting drainage right before winter
Do this in autumn, not in January.
- Clear the gutters and check where downspouts discharge. A downspout dumping onto a resurfaced walkway creates a sheet of ice and keeps that section wet all winter.
- Check the low spots. After a rain, look for puddles that do not clear within a few hours. Those are the areas that will cycle repeatedly.
- Blow out and shut down irrigation so no line is weeping under or beside the slab.
- Keep the pool deck perimeter clear. Autumn leaves left against the coping trap water and stain.
- On sloped West Kelowna lots, watch where uphill runoff crosses the driveway. Melt from above can refreeze at the bottom of a slope overnight.
Pool decks specifically
A resurfaced pool deck has a slightly different set of winter concerns.
- Winter cover runoff. Water pumped off a cover should be directed away from the deck, not across it.
- Furniture feet. Metal feet left in place all winter can stain and, on a freezing surface, can freeze down and mark when moved. Store furniture or fit soft glides.
- Do not use the deck as a snow pile. Snow shovelled off a walkway and heaped on the pool deck holds moisture there for weeks longer than the rest of the yard.
- Trapped water at the coping joint is worth checking. The joint between deck and coping is a maintenance item.
Spring check
When the snow is off, walk the whole surface in good light and look for:
- Any lifting, chipping or dull patches at edges, particularly the driveway apron where the plow and the road meet.
- White residue from de-icers, which should be washed off.
- Cracks in the concrete beneath that have telegraphed through, which are worth photographing and reporting to your installer early rather than at the end of a warranty period.
- Loose aggregate or a change in texture in a traffic path.
Most coating warranties expect reasonable maintenance and a reasonable inspection cadence. A photograph in April is a much better position to be in than a description in September.
Frequently asked questions
Can I pressure wash a resurfaced surface in spring?
Usually yes, at moderate pressure with a wide fan tip held back from the surface, but confirm the pressure limit with your installer. A narrow tip held close can lift a coating at an edge.
Does a coated surface need resealing?
Some systems have a UV topcoat that is a periodic maintenance item and some do not. Ask specifically what your system's topcoat schedule is, and put the date in your calendar.
Is it more slippery than bare concrete when icy?
Aggregate systems are generally textured for slip resistance, but ice on top of any surface is ice. Sand is your friend.
What if a crack appears in the concrete underneath?
A resurfacing system bonded to existing concrete follows the concrete. A structural crack below can eventually show through. Report it early; the response is different depending on whether the crack is moving.
Should I do anything before the first freeze?
Sweep it, make sure it drains, put a bag of sand and a poly shovel where you will actually reach for them, and tell your plow operator.
A West Kelowna option worth quoting
*Disclosure: Sierra Stone is a business listed on the Okanagan Trade Directory. The description below comes from their own published information, and their Google review count is modest at the time of writing, so ask for recent local addresses you can drive past.*
Sierra Stone is a family owned stone coating contractor serving the South and Central Okanagan. The company resurfaces pool decks, patios, driveways, front steps, walkways, garage floors and basements using natural river stone aggregate bonded into an industrial grade epoxy matrix and protected by a UV stable topcoat. They state that the system bonds directly over existing concrete with no demolition and no week long re pour, that it is slip resistant, freeze thaw stable and UV proof, and that most projects complete in two to three days with a 25 year service life. They offer free in home estimates from Penticton to Vernon and list service areas including West Kelowna, Kelowna, Lake Country, Peachland, Summerland, Penticton and Vernon.
See their Okanagan Trade Directory listing or visit sierrastonesouthcentral.com.
Whoever installed your surface, get the approved de-icer list in writing before the first snow. That one sentence protects the warranty.