How to Choose a Countertop, Including the Question About Silica Nobody Answers

The four materials, side by side

The differences that matter day to day come down to four things: whether the surface absorbs liquid, whether it tolerates heat, whether it holds up in sunlight, and how forgiving it is when someone in the house is careless. Everything else is preference.

Engineered quartz is ground natural quartz held together with a resin binder. Because it is non-porous, it never needs sealing, and red wine sitting overnight does nothing. The resin is also its limit. Heat damages the binder, so a pan straight off the burner can leave a permanent mark, and ultraviolet light degrades it over time, which is why quartz is a poor choice for a sun-flooded south-facing counter and a bad choice outdoors.

Granite is quarried stone, so it is porous and needs sealing on a schedule the fabricator will specify. In exchange it takes heat far better than quartz does. Its other trait is variation. No two slabs are alike, which is a genuine advantage when you want a counter that does not look like a catalogue item, and a real risk when you approve a 4-inch sample and receive something with a river of movement through the middle of it. Go see the actual slab.

Porcelain, in the large-format sintered sheets used for counters, is the toughest of the four against heat and sun. It works outdoors, which none of the others do well. It also arrives thin, so a chunky edge is usually built by mitring two pieces together at a corner, and on some products the colour is applied at the surface rather than running through the body, which shows up at cut edges and around undermount sinks. Fabricating it takes specific tooling and a shop that has done it before.

Marble is soft and porous. Acid etches it, so lemon juice and wine leave dull marks in the polish, and it stains. People who love marble know all of this and want the way it ages anyway. People who want a counter to look new in ten years should not buy it.

The silica question, told properly

Here is the part that most renovation blogs leave out, and the part that changes how you should choose a supplier.

In December 2023, Australia's work health and safety ministers agreed to prohibit engineered stone. The ban on the use, supply and manufacture of engineered stone benchtops, panels and slabs took effect on 1 July 2024, followed by an import ban on 1 January 2025. Products containing under 1 percent crystalline silica are excluded, and removing or repairing stone already installed is still allowed.

The reason is the dust. Cutting, grinding and polishing engineered stone releases respirable crystalline silica, and the silicosis cases among young fabrication workers in Australia arrived faster and more severely than the trade expected. A paper in the BC Medical Journal by Bharmal, Sampson and Chua puts engineered stone at more than 90 percent silica, against roughly 45 percent in granite and about 5 percent in marble. That concentration is the whole story.

Canada has not followed. No Canadian province or territory has banned engineered stone, and none licenses its fabricators. CCOHS, in guidance revised in January 2025, names Australia's prohibition as the only one of its kind and describes the Canadian approach as controlling exposure through occupational limits. Ontario has issued an awareness alert. That is the extent of it.

What British Columbia actually requires

BC's silica rules came in through B.C. Reg. 9/2017 and they are written generically for respirable crystalline silica across all work. Read the text of Part 6 of the Occupational Health and Safety Regulation and you will not find the words artificial, countertop, or benchtop anywhere in it. There is no engineered stone chapter, because the rules were never written that way.

What the regulation does require of an employer whose workers are exposed is a written risk assessment under section 6.112, an exposure control plan under 6.112.1, air monitoring on the first shift of the work with records kept for ten years under 6.112.3, and training under 6.112.7.

There is exactly one outright prohibition in that part, and it concerns cleanup. Section 6.112.6(2) states that an employer must not permit the use of blowers, compressed air, dry sweeping or dry mopping to clean up or remove respirable crystalline silica dust. Dry cutting itself is not banned in BC. It falls under the general hierarchy of controls in section 6.112.2, which pushes an employer toward eliminating or engineering out the hazard before relying on protective equipment.

The exposure limit sits in WorkSafeBC's Table of Exposure Limits at 0.025 milligrams per cubic metre as an 8-hour time-weighted average, carrying the A2 notation for a suspected human carcinogen and the notation identifying it as an IARC Group 1 agent. Under section 5.57 exposure must be kept as low as reasonably achievable below that limit, and an exposure control plan is triggered once exposure reaches 50 percent of it under section 5.54.

One correction worth making, because it circulates: B.C. Reg. 229/2025, deposited on 11 December 2025, does not touch silica. Its provisions coming into force on 1 April 2026 deal with safety headgear and respirator standards.

• Written risk assessment, s.6.112
• Exposure control plan, s.6.112.1, and triggered at 50 percent of the limit under s.5.54
• Air monitoring on the first shift, records kept 10 years, s.6.112.3
• Worker training, s.6.112.7
• Prohibited for cleanup: blowers, compressed air, dry sweeping, dry mopping, s.6.112.6(2)
• Exposure limit 0.025 mg/m3, 8-hour TWA, kept as low as reasonably achievable under s.5.57

Who carries the risk, and who does not

This distinction matters enough to state plainly. The silica hazard belongs to the fabrication shop. It is created when a saw or a grinder turns solid stone into airborne dust, and it is breathed by the person operating that tool. A countertop that has been cut, polished, delivered and installed in your kitchen is inert. Living with one exposes you to nothing.

So nobody reading this needs to worry about the quartz counter already in their house, and nobody should be talked into replacing one on health grounds. That would be a dishonest sale.

What the numbers do change is who you buy from. The BC Medical Journal paper estimates that 57,000 workers in BC are exposed to silica each year, with 64 percent of those workers at risk of high exposures, and notes that silica-related disease is underreported by a factor of 2.5 to 5. It also reports that WorkSafeBC accepted 38 silicosis claims in total between 1996 and 2020, seven of them in the 2016 to 2020 period, at an average cost of $284,500 per claim. That claims data is not broken out by industry, so it cannot tell you how many of those 38 involved stone fabrication. It tells you the disease is accepted, expensive, and rare in the record while the same authors say the record undercounts it.

Given all of that, asking a fabricator how they cut is a fair question. It is the same category of question as asking whether an electrician pulls permits.

What to ask the shop that cuts your counter

You are usually two steps removed from this. You hire a builder, the builder hires a fabricator, and the fabricator's shop is somewhere in Burnaby or Port Coquitlam that you will never visit. Ask anyway. The answers come back quickly from shops that have their process sorted out, and slowly from shops that do not.

On the projects we run, the questions below are the ones that separate the two.

• Do you wet cut, and is water on the blade for every cut including the small trims and the sink cutout?
• Do the shop tools have local exhaust ventilation connected and running?
• Do you have a written exposure control plan for respirable crystalline silica?
• How do you clean up dust at the end of a shift?
• Who does the on-site fitting cuts, and how is that dust controlled inside my house?

What actually drives the price

Two kitchens that pick the same material can land a long way apart on cost, and the material is rarely the reason. What moves the number is how much of each slab ends up in the bin.

Slab yield comes first. Counters are cut from rectangles, and your kitchen is not a rectangle. A layout with a large island, a long run, and an awkward return may need a second slab to produce one more piece, and you pay for the whole slab. Sometimes moving a seam by 300 millimetres saves an entire slab, which is a conversation worth having with the fabricator before anything is cut.

Then the details. A thicker apparent edge built by mitring adds shop labour. Every cutout for a sink, a cooktop, or a set of pop-up outlets is a cut. Seams cost money and, more to the point, you have to look at them, so the number and position of them is a design decision as much as a technical one. Materials needing specific tooling, porcelain in particular, narrow the field of shops that can do the work well and that shows up in the quote.

Delivery is a real cost line on this side of the water. Stone is heavy, slabs are large, and a house on a lane in Deep Cove with a switchback approach and a flight of stairs to the front door is a different job from a flat driveway in Norgate. Sometimes access decides the slab size you can buy at all, which then decides where the seams go, which then decides the look of the island. That chain runs backwards from the driveway, and it is worth working out early.

How this plays out in North Shore kitchens

Large islands are the standard ask here. Almost every kitchen renovation we quote wants one, and the question of whether it can be a single unbroken piece is settled by slab dimensions and by whether that slab can physically reach the room. Houses in Canyon Heights and Deep Cove built into slope, with stairs up to the entry and no straight run through the house, put a hard limit on what can be carried in. A seam in the middle of an island is not a failure. Discovering the need for one on installation day is.

The sun issue is the other local one. Kitchens with big south-facing glass, and the outdoor kitchens that keep appearing on North Shore decks, are exactly where quartz has a problem. The UV degradation is slow, and it is uneven, so the strip of counter under the window ends up a different shade from the strip in the shade of the upper cabinets. Porcelain or granite belongs in those positions.

And the honest recommendation for most clients ends up being unglamorous. Quartz for the main working surfaces where wiping up matters more than anything else, something UV-stable where the sun lands, and marble only in a place where a person has decided in advance that they like how it ages. That last one is a personality question rather than a materials question.