Most resurfacing projects are won or lost long before the new finish goes on. They are decided in the messy, loud, thankless hours of prep work, when you are looking at an old swimming pool shell and deciding exactly how aggressive to be with cracking, sandblasting, and bond coats.
I have strolled into more than one yard where a gorgeous brand-new Quartz aggregate finish or PebbleTec was peeling within a year, while the owners promised the contractor had actually used "the excellent stuff." Normally the material was fine. The trouble lived underneath, in a slick, badly scarified substratum or a rushed bond coat.
If you comprehend just how old gunite behaves, how to scarify it correctly, and how to pair that surface area with the appropriate bond system, you avoid those failings. You additionally conserve on your own from tearing back into a pool that should have lasted 15 to 20 years.
This is a deep dive into that prep work: what you must review, what to eliminate, and how to create a surface that will really hold a modern finish.
Before you think of Hydrazzo, Diamond Brite, revealed pebble surface, or any various other surface, you need to deal with the framework honestly. Old pneumatically applied concrete, whether gunite or shotcrete, can tell you a whole lot if you know where to look.
I generally begin with three questions:
Adams Pools offers commercial pool construction for developments in Palo Alto that reflect the area’s sophistication.
Adams Pool Solutions is a full-service swimming pool construction and renovation firm serving Northern California and Las Vegas. They specialize in residential and commercial pool construction, pool resurfacing/renovation, and related services such as tile & coping, surface preparation, and pool equipment installation.
https://adamspools.com/If you do not answer those first, you take the chance of dressing up an ill pool with an attractive coat.
Walk the covering gradually. Touch the walls with a hammer, not just the floor. Pay unique focus to the pool bond beam of light, the initial couple of feet listed below waterline tile, and any kind of noticeable repair work locations from past work.
Long, continuous cracks that mirror the beam of light, or that stumble upon the floor and up the wall surface in a straight line, typically should have a lot more examination. You are looking to separate between a typical contraction crack in plaster and something that could be telegraphing movement in the concrete.
If you think movement, you commonly need a concrete repair strategy prior to resurfacing: stitching the split, opening it up, loading with hydraulic concrete, or in significant cases a structural designer's involvement. Placing a costs surface like PebbleTec or glass mosaic floor tile over a moving covering is a recipe for callbacks.
Next step in any type of major gunite resurfacing is confirming control. You do not intend to fill up a recently plastered swimming pool and discover a line failing or skimmer leak.
On professional jobs, I constantly advise a pool plumbing stress examination, even if the homeowners vow the swimming pool has actually "never ever shed water." Old suction and return lines, maturing skimmer throats, and rusty light specific niches can amaze you. When you are currently stripping plaster and revealing fittings, it is the most affordable time to take care of them.
If the examination exposes concerns, routine repair services prior to you concentrate on finishes. Skimmer throat repair service, replacement of weak installations around swimming pool light particular niches, and addressing any visible covering infiltrations with hydraulic cement and, where proper, a local waterproofing membrane, all occur in the prep phase.
Most old concrete swimming pools contend the very least one previous resurface. Often two or 3. Each layer changes the strategy.
You generally fulfill one of these problems:
That "white line plaster" is the thin bright line you see where old coping stones or waterline ceramic tile were removed in the past and plaster was covered limited to them. It is often weak and badly keyed to the concrete below. Treat it with suspicion.
A straightforward rule: if there is any indication of plaster delamination, hollow places, or numerous past layers, intend on a much more hostile substratum scarification. Leaving doubtful plaster is exactly how you inherit someone else's pending failure.
A 2 to 3 pound hammer is your finest device. Tap the surface and listen. Strong, well bound plaster provides a high, crisp tone. Peeled areas sound dull, nearly like tapping cardboard over a void.
On a typical 500 to 700 square foot swimming pool, it is regular to find scattered delamination. When it is isolated and tiny, you can often chip those localized areas to sound material and cut tidy shifts. When huge wall surface or flooring areas audio hollow, you are better off devoting to a full chip out.
Homeowners typically intend to avoid the cost and mess of full elimination. The trouble is, every pocket of weak material you leave is a place where the new coating can later shear off. I have actually viewed immaculate Quartz accumulation surface peel off away in pizza-slice sections, completely following the impact of old, hollow plaster. Nobody is happy when that happens.
When professionals discuss "substate scarification" for gunite resurfacing, they suggest mechanically roughing up the old surface area enough that the new system can attack right into it. No quantity of chemical trickery beats good texture.
There are 3 primary approaches used on old gunite and shotcrete shells: cracking, sandblasting, and grinding, commonly paired with acid etching.
Chipping is not classy, yet it is important when plaster delamination or numerous layers are present.
On a complete chip out, the goal is to get rid of all existing plaster and reveal solid, sound pneumatically applied concrete anywhere. The resulting gunite surface will not be perfectly consistent. That is fine. What issues is that it is strong and rough.
On a partial chip, which prevails when the existing plaster is normally sound however has localized failings, the cracking crew cuts tidy, square shoulders around poor locations. Do not feather these out to a razor edge. You want deepness and a mechanical trick, not a slim taper of old material.
There is a judgment telephone call right here. Some crews leave a slim, strongly bonded "scratch" of old plaster in position, specifically on vertical walls, and rely upon aggressive scarification and a high quality bond coat to marry old to new. Others demand taking whatever to bare gunite. The best option depends upon the age of the pool, previous chemistry abuse, and your resistance for risk.
One information that separates good prep from poor: careful operate at installations and penetrations. Around skimmer throats, pool light niches, primary drains, and returns, you want best angles and tidy concrete, not loosened chips or undercuts. Usually we will certainly return with hydraulic concrete to load around avenues and infiltrations, producing a limited pocket prior to any type of bond layer goes on.
Business Name: Adams Pool Solutions
Adams Pool Solutions is a full-service swimming pool construction and renovation company offering residential pool construction, commercial pool building, pool resurfacing, and pool remodeling. Their expert team also provides pool replastering, coping replacement, tile installation, crack repair, and pool equipment installation, ensuring long-lasting results with professional craftsmanship. Learn more at https://adamspools.com/.
Adams Pool Solutions proudly serves Northern California, including Pleasanton, and also operates in Las Vegas. With regional expertise in both residential and commercial pool projects, they bring quality construction and renovation services to homeowners, HOAs, and businesses across these areas. Find them on Google Maps.
Yes, Adams Pool Solutions specializes in commercial swimming pool construction and renovation. Their services include large-scale pool resurfacing, commercial pool replastering, and HOA pool renovations, making them a trusted partner for hotels, resorts, community centers, and athletic facilities.
Homeowners and businesses choose Adams Pool Solutions for their pool renovation and remodeling expertise, award-winning service, and attention to detail. Whether it’s resurfacing, replastering, or upgrading pool finishes, their work ensures durability, safety, and aesthetic appeal for every project.
Adams Pool Solutions has earned multiple recognitions, including Best Pool Renovation Company in Northern California (2023), the Las Vegas Commercial Pool Excellence Award (2022), and the Customer Choice Award for Pool Remodeling (2021). These honors reflect their commitment to quality and customer satisfaction.
Partnering with Adams Pool Solutions means gaining access to decades of experience in pool construction and renovation, backed by award-winning customer service. Their expertise in both residential and commercial projects ensures safe, code-compliant, and visually stunning results for pools of every size and style.
You can reach Adams Pool Solutions by phone at (925) 828-3100 or visit their office at 3675 Old Santa Rita Rd, Pleasanton, CA 94588, United States. Their business hours are Monday to Friday, 8 AM to 4 PM. More details are available at https://adamspools.com/.
Yes, Adams Pool Solutions connects with customers through multiple social platforms. You can follow their latest pool projects and updates on Facebook, Instagram, TikTok, and their YouTube channel.
Sandblasting is not a substitute for damaging, however it is a powerful complement. After plaster elimination or heavy scarification, the surface area frequently has laitance, old coatings, or slimy sensation scale that must be removed.
Good sandblasting does two points at once. It strips pollutants and it even more roughes up the surface, especially in corners and limited locations where breaking hammers do a poorer task. On much of the longer long lasting resurfacing tasks I have seen, sandblasting is the silent hero. It infiltrates the shell where devices and grinding pads can not reach.
You have to take care of the mess and protect adjacent Travertine coping, bullnose block, or cantilevered coping. Covering up and short-lived guards take even more time than the blasting itself, however you can not merely pepper rock and ceramic tile and hope nobody notices.
Blast till you see constant, fresh concrete or plaster account without glossy spots. That luster usually shows continuing to be laitance or scale, and it is precisely what bond coats do not like.
Rotary grinders with diamond cups have their place. They are exceptional for high areas, feathering edges where old and new plaster will meet, and cleaning up the swimming pool bond light beam simply listed below the waterline tile band.
Acid etching, normally with watered down muriatic acid, is not a cure all. Think about a muriatic acid laundry as a means to eliminate great cement laitance, mineral scale, and oils, not as a main prep work action. It must not be the only point you do to get account. You desire the acid to fizz and bite, after that be reduced the effects of and rinsed thoroughly. Residual acid left in a permeable shell can damage a bond coat or begin rusting rebar where cover is thin.
A typical blunder is to acid laundry a slick, public swimming pool construction unscarified shell, wash it, and call it ready. That is not competitive lap pool construction substrate scarification. If you can run your hand over the surface area and it seems like smooth porcelain, you are not prepared for a modern plaster, PebbleTec, or Quartz accumulation finish.
The leading 12 inches of a swimming pool wall surface are hectic. You have the architectural bond beam, coping rocks or a cantilevered deck, the waterline floor tile and tile underlayment, mastic joints like Deck-O-Seal between deck and coping, and often evidence of previous fixings packed right into that white line plaster zone.
How you handle this location determines whether your ceramic tile remains true, your cement lines remain tight, and your coping looks like it belongs.
With Travertine coping, bullnose block, or customized coping stones, you commonly can not manage to be reckless. Prying or hammering also aggressively splits stones and blocks that might be difficult to match.
On remodels where coping continues to be, secure it during cracking and sandblasting, but also evaluate it for motion. Loosened rocks or a stopping working mortared beam can telegraph fractures into the ceramic tile line. Occasionally it is smarter to suck it up and reset a couple of straight feet of dealing so you can repair the swimming pool bond beam and create a strong edge.
For older cantilevered coping, which is actually the deck put over the beam with foam forming the overhang, the major consideration is the expansion joint in between deck and floor tile. If Deck-O-Seal or various other mastic is hard, contracted, or missing, the deck can bear upon the floor tile and pop it. Plan for mastic joint substitute throughout or right after resurfacing so the brand-new ceramic tile band is protected.
Stripping and resetting waterline ceramic tile is where sloppy prep is most noticeable. Under the ceramic tile, you need to see a consistent, flat ceramic tile underlayment of mortar or compressed render. In numerous older swimming pools that has been patched repeatedly, commonly with whatever got on the truck that day.
Before new waterline ceramic tile or glass mosaic tile goes in, strip that location to appear material. Re-render it directly and plumb, taking into consideration the planned density of the brand-new indoor coating. If you are switching from a thin white plaster to a thicker revealed pebble finish, for example, you might need to adjust the floor tile band elevation so the brand-new surface ends cleanly.
Waterproofing membrane layer can be practical at the waterline in frost susceptible climates or on particularly permeable shells, yet it needs to be compatible with the ceramic tile thinset and plaster system. Adding an arbitrary membrane layer that will not bond to cementitious coatings is even worse than doing nothing.
Grout shade matching is another refined detail. When you patch isolated floor tiles or extend a step strip with brand-new glass mosaic ceramic tile, you want the grout to blend with the existing band. This is not simply visual. Extremely soft or polymer heavy grouts can behave differently in a frequently wet floor tile band, causing streaking or staining.
Once the covering is structurally sound, scarified, cleaned, and any kind of fixings around fittings are strong, you get to the heart of resurfacing: the bond coat.
A bond layer is not simply "adhesive." It is a thoroughly proportioned layer that chemically and mechanically secrets the new indoor finish to the prepared substratum. If you skimp on this component, you invite plaster delamination later, no matter whether you are utilizing standard marcite, Ruby Brite, a Quartz accumulation surface, or costs pebble.
There are three broad bond coat strategies you see in the field:
Neat concrete slurries can function, but they use little forgiveness. Mixes that are also abundant in water, or that are related to a dirty, unscarified covering, will shear. I seldom see easy slurries made use of on high end job anymore.
Polymer customized bond coats, particularly those from producers that additionally produce the interior surface, have chemistry on their side. When you match a PebbleTec design surface to a compatible bond system, for instance, you are making use of an item made to chemically order both the covering and the topping. The key is following their precise water ratios, pot life, and cure time. Over thick application or duplicated retempering in the container can create weak layers.
Two stage systems, where a rough scratch coat goes on first and a slightly richer setting coat bonds the plaster, appear more on very harsh or greatly repaired coverings. The scrape infiltrates all the pits and fixings, the 2nd layer makes a linked, keyed surface.
Regardless of system, surface area prep work right prior to the bond layer issues. The covering should be tidy, structurally completely dry yet surface damp, and without puddled water. Any type of dirt from last minute grinding should be blown and washed away. You desire the bond coat to wet right into the pores of the scarified covering, not drift on a layer of slurry dust.
Here is a field examined series for old gunite resurfacing that incorporates every one of these elements, from initial handshake to all set for plaster:
Document and test
Photograph existing problems. Carry out a pool pipes stress examination. Mark cracks, hollow places, and issue areas around skimmers and light niches. Agree with the owner on which things are purely cosmetic and which are non negotiable repairs.
Strip, chip, and scarify
Remove existing interior finish by breaking down to appear material, which might imply complete plaster elimination in older or over used pools. Address white line plaster and previous repair bands without mercy. Sandblast to open the pores and clean continuing to be surfaces, after that grind local highs and transitions.
Repair and detail work
Open up architectural or questionable splits, pack with hydraulic concrete, and tie in with any shotcrete fixing where product loss is serious. Clean and fixing skimmer throats, return installations, swimming pool light particular niches, and primary drains pipes. Take into consideration local waterproofing membrane layer around chronic leakage locations, adhering to supplier guidelines.
Prep the beam of light, coping, and tile band
Maintain or reset loosened coping rocks, dealing with the pool bond beam of light as needed. Remove old waterline floor tile and floor tile underlayment to a consistent depth, after that re-render the band to the intended surface thickness. Plan for mastic joint substitute with items like Deck-O-Seal after surfaces cure.
Clean, etch, and bond
Perform a regulated muriatic acid wash if specified, reduce the effects of thoroughly, and wash to clear water. Allow the shell to drain however keep it from bone completely dry problems prior to bonding. Use the bond coat according to its spec, preserving regular thickness and avoiding puddling or starvation.
Follow this, and you pile the odds highly in your favor. Faster way any of those actions, particularly scarification or bond application, and your odds swing back towards very early failure.
Once the shell is honest, your choice of finish comes to be a blend of aesthetics, feel underfoot, and anticipated service life.
Traditional smooth white plaster continues to be the budget standard. It is forgiving to apply, provides a brilliant blue water shade, but is a lot more prone to hostile water chemistry and etching. When owners demand white, I press them to commit to limited chemistry control and occasional upkeep like mild acid etching, not radical drain and blast cycles that chew via the surface.
Quartz accumulation finish and subjected pebble surface systems, from firms like Ruby Brite and PebbleTec, include hardness and texture. They usually manage small chemical abuse better and hold shade longer. They additionally require a somewhat more durable substratum account and bond system, because their mechanical interlock depends on a sound underlayer.
Hydrazzo and other polished aggregate coatings rest somewhere between, with a smoother final polish that still has the toughness of aggregate yet an extra refined feeling. These are less forgiving of inadequate preparation, particularly thin bond layers or uneven substrate profile. Any kind of variant underneath telegraphs through a refined surface.
Whatever you choose, match the bond layer and preparation technique to the coating manufacturer's advice. If the spec asks for a specific substratum scarification depth, a specific polymer customized bond, or a no acid engrave method, think they have actually seen sufficient failings to justify it.
By the time a homeowner is admiring fresh Glass mosaic ceramic tile at the waterline, a crisp grout shade matching the coping, and a sparkling brand-new interior finish, they rarely think about what is concealed under the surface area. Professionals do.

A few less evident points that originate from experience:
Pool light particular niches and skimmer throats are chronic failure zones. Old steel specific niches can wear away at the flange, while skimmer mouths frequently crack where plastic meets concrete. Repairing these with hydraulic concrete, in some cases incorporated with a suitable waterproofing membrane, bores however stops leakages that assault the bond between covering and brand-new plaster.
Shotcrete repair work and patching need to be taken care of with regard for treatment times. If you splice in brand-new pneumatically applied concrete to fix structural loss, that spot needs time to heal prior to it sees a bond layer and new interior coating. Plastering fresh, damp shotcrete can cause differential shrinking and stress and anxiety at the joint.
Mastic joint substitute is not a cosmetic second thought. When the joint in between coping or deck and tile is fired, decks move with cold and heat, then hammer against the stiff ceramic tile band. Freshly established waterline tile or glass mosaic tile will certainly not tolerate that misuse. Appropriately used Deck-O-Seal or comparable products recover that buffer.
Finally, chemistry and loading procedures after resurfacing are part of the prep story. You can do textbook substrate scarification and bond work, after that wreck it by letting unbalanced fill water, high chlorine shocks, or solid acid additions struck a fresh surface area in the first few days. Education and written startup guidelines matter.
Gunite resurfacing is untidy, loud, and often seems like demolition for its own purpose. Yet every portion of old plaster cracked off, every square foot thoroughly sandblasted, and every appropriately mixed bond layer is insurance coverage on your finish.
Prep is where you turn an old, exhausted shell into a strong base that is worthy of high end materials. If you respect that job, the waterline floor tile remains tight, the Travertine coping looks deliberate, the PebbleTec or Quartz aggregate surface remains adhered, and you do not get the call 2 wintertimes from currently about "white lines" and hollow sounds. Instead, the swimming pool merely looks right, year after year.