how to fix a fiberglass pool

Repairing a fiberglass pool can be a complex task that requires careful assessment and professional expertise. Fiberglass pools are known for their durability, but if they develop cracks, blisters, or other damage, it’s essential to address the issues promptly to prevent further deterioration. Here are some general steps to guide you through the process:

Materials You May Need:

  1. Safety Gear: Safety glasses, gloves, and a dust mask for protection.
  2. Resin Repair Kit: A fiberglass repair kit, typically including resin, hardener, and fiberglass mat or cloth.
  3. Sanding Tools: Sandpaper or a rotary sander for smoothing surfaces.
  4. Paint and Gelcoat (if needed): For refinishing the pool’s surface.
  5. Fiberglass Patch Material: To cover larger or more severe damage.
  6. Mixing and Application Tools: Brushes, rollers, and mixing containers.
  7. Screwdriver or Chisel: For removing loose or damaged material (if applicable).


  1. Drain the Pool (if necessary):
    • If the damage is below the waterline, you may need to partially or fully drain the pool to access and repair the affected areas. Follow your local regulations and guidelines for pool draining.
  2. Safety Precautions:
    • Put on safety glasses, gloves, and a dust mask to protect yourself during the repair process.
  3. Inspect and Prepare the Damaged Area:
    • Examine the damaged area carefully to assess the type and extent of the damage. If there are loose or damaged sections, use a screwdriver or chisel to remove them, creating a clean and stable surface for repair.
  4. Clean and Sand the Surface:
    • Clean the damaged area thoroughly to remove dirt, debris, and any loose material. Sand the area to create a rough surface that will promote better adhesion for the repair materials.
  5. Prepare the Fiberglass Repair Kit:
    • Follow the manufacturer’s instructions to mix the resin and hardener from the repair kit. Be sure to work in a well-ventilated area and wear appropriate protective gear.
  6. Apply the Repair Material:
    • Apply a layer of the mixed resin to the damaged area, ensuring it covers the entire affected region. If using fiberglass mat or cloth, place it over the wet resin and saturate it with more resin until it’s fully soaked.
  7. Smooth and Feather the Edges:
    • Use a roller or brush to smooth out the resin and feather the edges to blend it with the surrounding pool surface. This will help create a seamless repair.
  8. Allow to Cure:
    • Let the repair material cure according to the manufacturer’s instructions. This typically involves waiting for several hours or overnight.
  9. Sand and Refinish (if needed):
    • Once the repair has cured, sand it to create a smooth surface. If the repaired area is visible, you may need to apply gelcoat or paint to match the pool’s finish. Follow the manufacturer’s instructions for application and drying times.
  10. Fill and Test:
    • If you partially drained the pool, refill it to the appropriate water level. Test the repaired area by filling the pool and monitoring it for any signs of leakage.
  11. Regular Maintenance:
    • To prevent future damage, practice regular pool maintenance, including water balance, cleaning, and proper chemical treatment.

Repairing a fiberglass pool can be challenging, and for significant or extensive damage, it’s advisable to consult with a professional pool repair specialist. They have the experience and equipment to handle complex repairs and ensure the pool’s structural integrity and water-tightness.