The specification, as Four Seasons Pool Builders publishes it

Outer Banks pool construction standards

A pool is mostly what you never see again once the water is in: the dig, the steel, the shell, the beam under the coping. Colin Cox and his crew build custom pools from Corolla to Cape Hatteras, and this page sets out the numbers they build to, one section at a time, beside the warranty they publish and the sequence they follow.

PHTA and IPPSA Certified Building Professional

The certification takes 24 hours of continuing education before testing and is good for 3 years.

Construction line (252) 207-5001

Four sections through the same pool.

Each drawing is cut through the wall and floor at one stage of the build. Scroll and the diagram stays put while the standard it shows changes.

Section diagram of a pool dig in sand, over-dug 6 to 12 inches below the shell line and compacted
Section diagram, not to scale. Over-dig 6 to 12 in, compacted.

Dig

Over-dig the sand, then compact it.

Before a shovel moves, the plans are reviewed against the 2012 ISPSC codes and the family sits down with the crew at a pre-construction meeting.

Outer Banks ground is sandy soil. The excavation goes 6 to 12 inches past the shell line and the over-dig is compacted back, so the pool sits on firm ground instead of loose fill.

Section diagram of #4 rebar tied through the pool walls and floor
Section diagram, not to scale. #4 (1/2 in) rebar.

Steel

Half-inch bar through the walls and the floor.

The cage is built from #4 rebar, which is 1/2 inch bar.

Steel runs through both the walls and the floor, tied before any concrete is placed. This is the skeleton the shotcrete shell is sprayed around.

Section diagram of an 8 inch shotcrete wall and floor with a 12 inch locking beam and four-bar bond beam
Section diagram, not to scale. Shotcrete 8 in minimum, 12 in locking beam.

Shell

Eight inches of shotcrete, locked at the top.

Walls and floor are shotcrete at a minimum of 8 inches. Four Seasons states that this is 33% stronger than the industry standard.

The wall is tied off with a 12 inch locking beam carrying a 4-bar bond beam. That 33% figure is the company's own claim, and the lifetime shell warranty below is what stands behind it.

Section diagram of waterline tile, coping and a deck with wire mesh bonded to the pool equipment
Section diagram, not to scale. Deck mesh bonded, spa suction 1.5 in minimum.

Waterline

Tile, coping, and a deck that is bonded.

Tile and coping set the waterline. The deck is poured or laid over wire mesh that is bonded to the pool equipment.

Bonding the mesh to the equipment gives stray ground current a safe path. On spas, plumbing uses a minimum 1.5 inch suction line with separate returns.

The warranty, in full.

This is the table Four Seasons publishes. The shell, the part nobody can reach later, carries the longest term.

Shotcrete shell
Lifetime
Plaster finishes
5 or 10 years
Pool light, cleaner, pump, filter, heater, controls
3 years each
Tile, coping, decking, skimmers
2 years each

Decks are covered for 2 years and the wire mesh under them is bonded to the equipment. See how pool decks are built.

Seventeen steps, in four phases, each one stepping lower.

This is the sequence they follow on every custom pool, from the first planning call to Pool School. Read it left to right; the phases sit lower as the pool does.

On paper

Plans reviewed for 2012 ISPSC codes, then a pre-construction meeting.

  1. Pre-planning
  2. Permitting
  3. Pre-site by Project Manager
  4. Plan Approval

In the ground

Over-dig, compaction, #4 steel and the 8 inch shotcrete shell.

  1. Layout
  2. Excavation
  3. Steel
  4. Gunite
  5. Pre-grade

At the waterline

Tile and coping, the spa plumbing rules, and the bonded wire-mesh deck.

  1. Tile and Coping
  2. Plumbing
  3. Electric
  4. Deck
  5. Screen

Handover

The pool is finished, cleaned and explained to its owner.

  1. Interior Finish
  2. Final Clean
  3. Pool School

Want the full scope of a new build, from shotcrete and fiberglass to infinity edges? Custom pool construction covers it.

Point Harbor, NC. Corolla to Cape Hatteras.

Ask Colin what goes under your pool.

New builds get a site visit before any price, and every client sees a 3-D rendering before construction starts. Call the construction line or ask for an estimate.

(252) 207-5001
Custom pool construction