Decks
Pools
Stonework
Outdoor Structures
Outdoor LivingLOCATION
Mulmur, Ontario
POOL SIZE
12 x 30 Ft
POOL TYPE
Fiberglass, Tanning Ledge
FOUNDATION
Slab on Helical Piles
Fiberglass Pool on Helical Piles in Mulmur
MULMUR CASE STUDY
A Fiberglass Pool on Top of a Hill
On a hilltop property in Mulmur, we installed a 12 x 30 ft fiberglass pool with a tanning ledge. It sits on a concrete slab, and helical piles hold up the slab.
The soil was the hard part. The lot sits high on a hill, and the ground under the pool couldn’t be trusted to carry it alone. So the pool doesn’t rest on native soil. It rests on a slab, and the slab rests on piles.
The shell came in one piece and went in by crane, with open country rolling away in every direction. Learn more about our fiberglass pool installation.
THE CHALLENGE
Difficult Soil, So the Base Came First
A fiberglass shell needs a firm, level bed under its whole length. On this Mulmur hilltop the soil conditions were poor, so we sorted out the foundation before anything else.
Helical piles take the load down past the weak ground. A reinforced concrete slab spans across them and gives the 30 ft shell one solid platform. In this photo the rebar mesh is laid out across the bottom of the dig, ready for the pour.
FROM THE GROUND UP
Three Layers Under the Water
Most of the work on this pool ends up buried. Here’s what’s under it, bottom to top.
PILES
Helical piles below
The piles reach past the problem soil, so the weight of the pool isn’t left to ground that can shift.
SLAB
A reinforced concrete pad
Rebar mesh and a full concrete pour make one flat platform the size of the pool, sitting on the piles.
SHELL
Fiberglass with a ledge
A one-piece 12 x 30 ft shell with a built-in tanning ledge. See our pool design and construction services.
FROM ABOVE
Ready for the Shell
The finished base from the drone: a levelled bed over the slab, with black fabric lining the walls of the dig.
SLAB AND BEDDING
Poured, Finished, Then Levelled Again
With the rebar set, the crew poured the slab and finished it flat across the full footprint of the pool. From the drone you can see the pad filling the bottom of the excavation.
Next, fabric went up the walls of the dig and a levelled bed went down over the slab, so the shell would land evenly from end to end.
INSTALL DAY
Lifted In by Crane
A crane picked up the shell, swung it over the excavation and lowered it slowly while the crew guided each corner down onto the base.
WHY IT WORKS
Three Calls That Shaped This Pool
01
Piles, not soil
The load goes to the piles instead of the weak ground.
02
One flat slab
The concrete pad gives the whole shell an even base.
03
A ledge to lounge on
The tanning ledge adds a shallow spot to sit in the sun.
PROJECT GALLERY
From Excavation to Crane Lift
Drone and ground photos of the Mulmur pool, from the rebar grid to the shell going in.
MULMUR PROJECT FAQS
Questions About This Fiberglass Pool
Short answers on how this pool went in.
Discuss a Similar Project
What was installed in Mulmur?
A 12 x 30 ft fiberglass pool with a tanning ledge, set on a reinforced concrete slab supported by helical piles.
Why does this pool sit on helical piles?
The property is on top of a hill and the soil conditions were challenging. The piles carry the slab and the slab carries the pool, so the shell doesn’t depend on that ground.
How was the fiberglass shell installed?
It came as one piece and was lifted in by crane, then lowered onto the levelled base over the concrete slab while the crew guided it into place.
Does Diamond Decks & Pools build in Mulmur?
Yes. This pool is in Mulmur. See the communities we work in most often on our pool and deck builder service area page.
PLAN YOUR POOL
Building a Pool on a Tough Lot?
Tell us about your yard, the slope and what you know about the soil. We’ll talk through the base, the shell and crane access as one plan.
Read about our workmanship warranty or browse more completed projects.