🏗️ Renovation
Renovation decision guide
Use these scenarios to explain options clearly and quote repairs honestly. Rules of thumb vary, so use your own judgment and local requirements.
Spot-replace tiles or replace the whole waterline?
Spot replacement makes sense when:
- Only a few tiles are cracked or loose, in isolated spots
- The cause is clear, such as impact or one failed section
- The surrounding tile, grout, and substrate are sound and dry
- Matching tile is available, or the repair is hard to notice
Replace the entire waterline when:
- The tap test finds hollow sounds across the band
- Many tiles are cracked, popped, or stained, or repairs keep failing
- Scale or efflorescence cannot be cleaned off
- The tile is discontinued and a patchwork of mismatched tile would show
- The bond beam or substrate is cracked, moist, or damaged
- Coping or deck work will expose the tile anyway, so doing both together saves labor
Rule of thumb: when a large share of tiles is failing, often around a quarter to a third, chasing spot repairs costs more than replacing the band. Quote both options and document with photos.
How to inspect: lower the water below the tile line, tap every tile, probe the grout, check the bond beam and coping joints for cracks and moisture, and note the condition of the expansion joint.
Mastic and expansion joints
- Inspect yearly for cracks, shrinkage, hardening, gaps, and lifted sections
- Cut out and remove the old material completely, then clean and dry the joint
- Install backer rod where joint depth requires it so the sealant bonds on two sides
- Prime if the manufacturer requires it, then apply a flexible sealant rated for pool decks and chemical exposure
- Tool the surface smooth, keep the joint dry, and protect it while it cures
- Explain to customers that failing joints let water under the deck and coping and cause freeze-thaw damage
Coping and bond beam
- Tap and push test coping for movement, and look for gaps and cracks
- Check the mortar bed for voids, and the bond beam for cracks
- Reset loose coping when the mortar bed and beam are sound. Replace it when pieces are cracked or the bed is failing
- Exposed or rusting reinforcing steel needs a structural evaluation
- Inspect the tile and waterline whenever coping comes up
Plaster and interior finish
- Signs of wear: roughness, etching, widespread staining, calcium nodules, and hollow-sounding spots
- Review the water chemistry history to find the cause before resurfacing
- Patch small bond failures. Resurface when wear or delamination is widespread
- Check the groundwater situation before draining. Emptying an inground pool can cause damage or even lift it, so follow the builder or manufacturer guidance
Decks and drainage
- Look for wide or growing cracks, settlement, heaving, and trip hazards
- Check that slopes and drains carry water away from the pool and the house
- Reseal joints and repair voids under the slab where needed
- Raised or sunken slabs may be lifted or replaced depending on the cause and condition
Freeze-thaw and water intrusion
- Water expands about 9 percent as it freezes, so any water trapped in cracks or joints can cause damage
- Find the entry points: failed mastic, cracked or loose tile, coping gaps, and hairline cracks above the waterline
- Verify winter water levels and plumbing protection
- Schedule repairs before freezing weather and photograph findings for the customer
Renovation planning checklist
- Leak test the pool before work starts
- Confirm permits and inspections required locally
- Plan for bonding and electrical updates when coping or deck is replaced, and reconnect bonding per local code
- Confirm barrier and drain-cover compliance when the work is done
- Protect the finish and equipment, and plan the water level
- Typical sequence: tile and coping, then deck, then plaster, then startup and chemistry
- Give the customer written scope, photos, and warranty details
⚠️ Professional note
Local codes, licensing, and manufacturer specs govern. Verify ranges against current standards (e.g., your health department, ANSI/APSP/ICC-11, and equipment manuals).
Local codes, licensing, and manufacturer specs govern. Verify ranges against current standards (e.g., your health department, ANSI/APSP/ICC-11, and equipment manuals).