Renovating a Pool? 7 Things to Inspect Before You Start

Before renovating a pool, take time to evaluate more than the finishes you plan to replace. The pool surface, structural shell, plumbing, potential leaks, equipment, tile and coping, and surrounding deck and drainage can all affect the scope of a renovation. Identifying problems in these areas before work begins can reduce the chance of discovering additional repairs, costs, or delays once the project is underway.

Fall can be a practical time to plan a swimming pool renovation in Texas because many homeowners are using their pools less and have more time to complete work before the following swim season. But the season itself is only one part of planning. Before replacing plaster, tile, coping, decking, or other finishes, it helps to understand the condition of the systems and structures underneath them.

This pool renovation checklist covers seven areas worth evaluating before you commit to a swimming pool renovation.

1. Evaluate the Pool Surface Condition

Start with the pool’s interior finish. Staining, roughness, cracking, discoloration, and other surface problems can be cosmetic, but some symptoms may also warrant a closer look at the material underneath. The goal is to determine whether the pool primarily needs resurfacing or whether another problem should be addressed first.

Structural vs. Cosmetic Wear

Not every crack in a pool finish is a structural crack. Some cracking may be limited to plaster or another finish, while other cracks can extend into or originate from the pool shell. Stains, discoloration, scaling, and areas of rough or worn finish are generally different concerns from movement or cracking involving the underlying structure.

If a crack is recurring, widening, unusually deep, leaking, or accompanied by other signs of movement, it should be evaluated before simply covering it with a new finish. Pool crack repair depends on identifying what is actually cracked and why.

Material-Specific Warning Signs

The warning signs also depend on the type of pool surface. Plaster and aggregate finishes may develop etching, staining, roughness, cracking, delamination, or areas that sound hollow when professionally checked. Hollow-sounding areas can indicate that the finish has lost its bond to the material underneath and may require additional preparation before resurfacing.

Vinyl liners can become brittle, faded, wrinkled, or torn as they age, particularly around fittings, steps, and other areas where the material is stressed. Fiberglass surfaces can develop gel-coat damage or osmotic blistering, which often appears as raised bumps or blisters on the surface. The cause and severity of fiberglass blistering can vary, so widespread or worsening blistering should be professionally evaluated before refinishing.

2. Check the Shell for Structural Problems

The interior finish and structural shell are not the same thing. A finish can deteriorate while the underlying shell remains sound, and structural movement can sometimes exist even when surface damage initially appears minor. Before a major renovation, look for evidence that the pool itself or the surrounding ground has moved.

Signs of Ground or Structural Movement

Warning signs can include recurring or widening cracks, sections of deck that have settled or separated, noticeably uneven coping or waterline tile, bulging or displaced areas, or other visible changes around the pool. These symptoms do not prove that the shell has structural damage, but they are reasons to have the condition evaluated before resurfacing work covers the area.

Significant structural concerns may require evaluation by a qualified pool professional or structural engineer, depending on the nature and severity of the problem.

Hydrostatic Pressure Risks

Draining an in-ground pool introduces another structural consideration: groundwater. When a pool is full, the weight of the pool and the water inside it help resist upward groundwater forces. If the pool is fully or partially emptied while the surrounding soil is saturated, hydrostatic pressure beneath the shell can potentially cause movement or, in severe cases, lift the pool out of the ground.

This risk is one reason an in-ground pool should not be drained casually, particularly after heavy rainfall or when groundwater conditions are uncertain. Fiberglass pools can be especially susceptible because of their relatively low shell weight, although concrete pools can also experience hydrostatic uplift. Renovation contractors may evaluate groundwater conditions and existing hydrostatic-relief provisions before draining the pool.

3. Pressure Test the Pool Plumbing

If a renovation will involve new decking, coping, or other construction around buried plumbing, checking the plumbing beforehand can be worthwhile. A hidden leak that is relatively accessible before construction can become much more disruptive to repair after new materials are installed.

Hidden Underground Issues

Underground suction and return plumbing can develop leaks from cracked pipe, failed joints or fittings, ground movement, installation problems, or age-related deterioration. Because buried plumbing cannot be fully evaluated through a visual inspection, unexplained water loss, persistent air entering the circulation system, or wet areas around the pool may justify additional testing.

The Role of Pressure Testing

During professional pressure testing, individual plumbing lines can be isolated, sealed, and pressurized while a gauge is monitored for pressure loss. A line that cannot maintain the test pressure may have a leak, although the test itself does not necessarily identify the leak’s exact location.

Testing pressure and procedures should be appropriate for the plumbing system and equipment being tested. For example, LeakTronics describes a water-based procedure that gradually pressurizes a line to about 15 PSI and cautions against exceeding 20 PSI. This type of testing is best left to someone with the proper plugs, gauges, regulators, and experience.

If the renovation will cover or make existing plumbing more difficult to reach, completing necessary leak testing beforehand can prevent newly installed materials from having to be disturbed later.

4. Check for Hidden Pool Leaks

Pressure testing focuses primarily on plumbing lines, but pools can lose water from other locations as well. Checking for leaks before renovation helps prevent a hidden leak from remaining underneath or behind newly completed work.

Common Areas Worth Inspecting

Potential leak locations include plumbing lines and fittings as well as skimmers, return fittings, light niches, penetrations, cracks, and other points where components pass through or connect to the pool structure. The likely source depends on the pool’s construction and the symptoms present.

Pre-Renovation Leak Tests

If unexplained water loss is suspected, a bucket test can help determine whether the pool is losing water faster than evaporation alone would explain. The test does not locate the leak, but it can help establish whether additional investigation is warranted.

Professional leak detection may then involve pressure testing, dye testing, electronic listening equipment, or other diagnostic methods depending on the suspected source. Ideally, a known leak should be located and incorporated into the renovation plan before new finishes or surrounding materials are installed.

5. Assess the Mechanical Pool Equipment

A renovation is also an opportunity to evaluate the equipment responsible for circulating, filtering, sanitizing, and heating the water. Equipment does not necessarily need to be replaced simply because the pool is being renovated, but identifying existing problems beforehand makes it easier to coordinate repairs or upgrades with the rest of the project.

Core Equipment Audit

Inspect the pump, filter, heater, valves, automation, sanitizer or salt-chlorine system, and other installed equipment for visible leaks, corrosion, unusual noise, damaged components, unreliable operation, or declining performance. A professional pool equipment inspection can also identify problems that may not be obvious during normal operation.

For example, a pool pump making unusual noise could have several causes, from debris or cavitation to worn internal components. The symptom should be diagnosed rather than automatically treated as a reason to replace the entire pump.

Automation & Efficiency Upgrades

If equipment is already nearing the end of its useful service life, repeatedly requiring repairs, or no longer meeting the homeowner’s needs, renovation can be a convenient time to consider replacement or upgrades. Pumps, filters, heaters, automation, sanitizing systems, and controls can often be evaluated as part of the overall project rather than addressed separately after construction is finished.

The decision should be based on the condition, compatibility, performance, and age of the equipment, not simply on the fact that the pool is being renovated.

6. Examine Tile and Coping Integrity

Tile and coping are highly visible parts of a renovation, but damage in these areas should be investigated before assuming the problem is purely cosmetic.

Tile & Grout Degradation

Look for loose or missing tiles, cracked grout, deteriorated joints, movement, and significant mineral buildup. Calcium deposits themselves do not necessarily indicate that water is leaking behind the tile, and loose tile can have several possible causes. However, damaged tile or grout can allow water into areas where it should not be and may also be associated with deterioration or movement underneath.

Professional pool inspection standards include interior surfaces, tile, coping, steps, and adjacent decks among the components that should be visually evaluated. Before installing new tile, the underlying substrate should be checked so damaged or poorly bonded material is not simply covered over.

Coping Stones & Bond Beam Health

Loose, cracked, or shifting coping can result from several conditions, including deterioration of setting materials, deck movement, expansion and contraction, or problems involving the bond beam. Coping damage alone does not prove that the bond beam is damaged, but widespread movement or recurring cracking can justify a closer inspection of the structure underneath.

If deterioration is present below the coping, repairing it before new coping is installed can help prevent the same problem from reappearing through the finished renovation.

7. Review Decking and Surrounding Drainage

The renovation plan should extend beyond the waterline. Deck settlement, drainage, grading, and runoff around the pool can affect both the usability of the deck and conditions around the pool structure.

Deck Slope and Water Pooling

Look for standing water, settled or heaved deck sections, major cracks, and areas where runoff consistently moves toward the pool instead of an appropriate drainage path. Pool decks should be designed so surface water is managed rather than allowed to repeatedly collect in problem areas.

A deck that directs runoff into the pool can also carry soil, landscaping debris, and other contaminants into the water. Where drainage problems exist, the solution may involve correcting deck slope, repairing drains, or otherwise redirecting runoff as part of the renovation.

Yard Drainage & Erosion

Also evaluate downspouts, nearby landscaping, yard grading, drainage channels, and areas of erosion. During heavy Texas rain, repeated water accumulation around the pool can saturate surrounding soil and worsen existing drainage or soil-movement problems.

Poor drainage does not automatically mean the pool shell has been damaged, but drainage and grading are worth evaluating when they may adversely affect the pool structure or surrounding deck. Addressing obvious water-management problems during renovation can help protect the work being installed.

Pool Renovation Checklist: 7 Areas to Inspect Before Work Begins

Here’s a pool renovation checklist summarizing each inspection area, its primary warning sign, and the immediate next step:

Frequently Asked Questions (FAQs)

1) Can you renovate a pool in the fall or winter?

Yes. In Texas, fall and winter can be practical times to complete certain pool renovations because homeowners are typically using their pools less. However, weather conditions still matter. Some materials and installation processes have manufacturer-specified temperature, moisture, and curing requirements, so the contractor should schedule each phase according to the materials being used and current conditions.

Contractor availability and the scope of the project can also affect the schedule, so it is better to plan around the specific renovation than assume every project is automatically better suited for the off-season.

2) How long does a typical swimming pool renovation take?

There is no single standard timeline for every pool renovation. A straightforward resurfacing project generally involves fewer stages than a renovation that includes structural repairs, tile and coping replacement, plumbing changes, equipment upgrades, decking, or other construction.

Weather, material availability, permitting requirements, inspections, curing times, and unexpected repairs can also affect the schedule. The contractor should provide a project-specific timeline after inspecting the pool and defining the complete scope of work.

3) What can make a pool renovation more expensive than expected?

Hidden conditions are one of the biggest variables. Structural damage, leaking or deteriorated plumbing, damaged bond-beam areas, drainage problems, electrical issues, or other repair needs may not become fully apparent until existing materials are removed or additional testing is performed.

Inspecting and testing the pool before construction begins cannot eliminate every surprise, but it can help identify major concerns early enough to include them in the project plan and budget.

4) How do I know if my pool needs to be resurfaced or fully renovated?

Resurfacing primarily replaces or restores the pool’s interior finish. If the main problem is worn, rough, stained, or deteriorated plaster or another interior surface and the rest of the pool is in good condition, resurfacing may be all that is needed.

A broader renovation may make more sense when the project also involves structural repairs, tile and coping, decking, plumbing, equipment, drainage, lighting, or other major components. An inspection helps determine whether the visible surface is the main problem or only one part of a larger project.

Renovating a Pool? Check These 7 Areas First

New plaster, tile, coping, or decking can dramatically change how a pool looks, but a successful renovation also depends on the condition of what sits underneath and around those finishes. Evaluating the surface, shell, plumbing, potential leaks, equipment, tile and coping, and surrounding drainage gives you a clearer picture of the work the pool actually needs.

Some of these checks can begin with a visual inspection, but plumbing pressure testing, professional leak detection, and structural evaluation require specialized equipment or expertise. If you’re planning a renovation and aren’t sure where to start, Poolie can help evaluate your pool and recommend the appropriate next steps before work begins. Fill out the form below to get started.