Direct answerConcrete allows more freedom in shape. Fibreglass can reduce site work.
What to check first
Crane and delivery access can decide whether a shell is practical.
The existing pool, property access and equipment condition can change the answer. Record what is happening before adjustments are made.
What affects the work
Repairs need materials that match the pool type.
A clear scope should separate inspection, repair and optional improvement work. This makes quotations easier to compare.
When a site visit is useful
A site visit is needed when the answer depends on pipework, water loss, structural movement or the exact equipment installed. Photos can narrow the likely cause but cannot confirm a concealed fault.