How much does a pebble finish or aggregate surface cost for an Ottawa pool renovation?

A pebble or aggregate interior finish for an Ottawa pool renovation typically costs $12,000 to $25,000 for a standard residential inground pool, which works out to roughly $80 to $150 per square metre of pool surface area. This is the all-in cost including surface preparation, material, and professional application — the price varies based on the specific product line, aggregate size, colour blend, and whether any repairs to the underlying shell are needed before the new surface is applied.

Pebble and aggregate finishes have become the dominant choice for Ottawa pool renovations because they dramatically outlast traditional white plaster. Standard plaster surfaces last 5 to 10 years in Ottawa's demanding conditions before showing staining, roughness, and deterioration. Pebble and aggregate finishes, by contrast, last 15 to 25 years with proper water chemistry maintenance. The pebble aggregate is exposed at the surface through a process of washing or acid-etching the fresh cement matrix, leaving a textured, stone-studded surface that resists chemical etching, calcium scaling, and the staining that plagues plaster pools in Ottawa's mineral-rich municipal water supply.

The major product categories and their Ottawa price ranges break down as follows. Exposed aggregate finishes — where small, smooth pebbles are revealed at the surface — represent the mid-range option at $80 to $110 per square metre. Brand names like Pebble Tec, StoneScapes, and NPP (National Plasterers Pool) fall into this category. Polished aggregate finishes, where the surface is ground smooth after curing to create a glass-like feel — brands like Pebble Sheen and BeadCrete — cost $95 to $130 per square metre. Premium custom blends with larger pebbles, glass bead accents, or abalone shell fragments push into the $120 to $150 per square metre range. For a typical Ottawa residential pool with 150 to 200 square metres of interior surface area, these prices translate to total costs of $12,000 to $22,000 for the standard exposed aggregate and $18,000 to $30,000 for premium polished or custom blends.

The colour of your pebble finish dramatically affects the pool water's appearance. This is not just an aesthetic consideration — it directly affects how warm your pool looks, how visible debris and algae are, and how much solar heat the pool absorbs. Light cream and sand-coloured blends create a Caribbean turquoise water colour that Ottawa homeowners overwhelmingly prefer. Medium grey and blue-grey blends produce a deeper, lake-like blue. Dark charcoal and black pebble blends create a dramatic mirror-like surface that absorbs significantly more solar heat — beneficial in Ottawa's short swimming season because a dark-bottomed pool can be 2 to 4 degrees warmer than an identical light-coloured pool, effectively extending your season by a week or two on each end.

Surface preparation before applying the new pebble finish is a critical step that affects cost. If the existing surface is plaster in reasonable condition, the applicator bonds the new pebble finish directly over it after acid-washing and applying a bonding agent — the most cost-effective scenario. If the existing plaster is delaminating, hollow-sounding when tapped, or has been patched multiple times, it must be chipped off down to the structural shell before the new finish is applied. This removal process — called a chip-out — adds $3,000 to $6,000 to the project depending on pool size and the stubbornness of the old surface. A pool that has already had two or more plaster coats applied over the original will almost certainly require a chip-out to ensure proper adhesion of the new pebble finish.

Ottawa's climate creates specific challenges for pebble finish application that affect scheduling and cost. The cement-based pebble material must be applied when air and surface temperatures are above 10°C and the forecast shows no rain for at least 48 hours after application. The surface then needs 7 to 10 days of careful curing — during which the pool is slowly filled with water and the water chemistry is precisely managed to prevent staining during the critical hydration period. In Ottawa, this means the application window runs from mid-May through September, with the ideal months being June through August when consistently warm temperatures ensure optimal curing. Scheduling outside this window is risky and most reputable Ottawa applicators will not do it.

The fill water chemistry during the first 30 days after a pebble finish application is critical, and Ottawa's municipal water presents specific challenges. Ottawa's water supply is moderately hard with calcium levels that vary seasonally. During the initial fill and startup, the pool water must be carefully balanced to a Langelier Saturation Index (LSI) near zero — slightly negative LSI dissolves the cement matrix and roughens the surface, while significantly positive LSI deposits calcium scale that discolours the pebbles. A startup chemical protocol for Ottawa water typically costs $200 to $400 in chemicals and includes sequestering agents for iron and manganese, pH adjusters, and alkalinity balancers specific to the local water profile. Many pebble finish applicators include this startup service in their price; others charge it separately, so ask during the quoting process.

Warranty terms for pebble finishes vary significantly between products and installers. Top-tier products like Pebble Tec offer a manufacturer's limited warranty of up to 10 years on the surface material, but this warranty is valid only when applied by a licensed applicator and maintained with documented water chemistry records. The installer typically provides a separate workmanship warranty of 2 to 5 years covering delamination, uneven aggregate exposure, and colour inconsistency. Ensure you receive both warranty documents — manufacturer and installer — in writing before the work begins. Maintaining a weekly water chemistry log protects your warranty claim if a surface issue develops later.

Looking for a durable, beautiful pool finish for your Ottawa renovation? Ottawa Pool Installation connects homeowners with experienced local pebble finish applicators who know Ottawa's water chemistry and climate requirements inside and out.