project history - camp na wa kwa - 4-7-2011 · title: microsoft word - project history - camp na wa...

Renovation Result PROJECT HISTORY CAMP NAWA KWA (GIRL SCOUTS) POLAND, INDIANA COMPLETION: 2008 PROJECT ASSESSMENT “PVC Problems.” Several years ago, the camp owners of this large outdoor, shot-creted and plastered pool opted to install a PVC Liner. After some years of use, the liner began exhibiting unappealing traits such as folds, discoloration, and pinholes resulting in tears and water loss. Moisture and condensation that transport through the liner and seep up through the pool shell by hydro static pressure became trapped. Yearly cycles of trapped freeze / thawed water damaged the plaster and concrete surface under the liner, resulting in tearing apart layers of the subsurface and demonstrating how damage and corrosion beneath an unbonded sheet lining can proceed unnoticed for several years. Structure cracks also affected the pool shell. “How it was done” RENOVATION PLAN The deteriorated liner and disintegrating, contaminated felt material under the liner were cut apart and removed. Chunks of plaster and concrete damaged by being trapped under the liner through several years of freeze/ thaw cycling were removed. Following high water pressure blasting (>5000 psi), and setting up hydrostatic water pressure relief by diaphragm pumping, all the structure cracks were permanently sealed with a high- grade epoxy sealant and InterSteel. Finally, the entire pool received the INTER-GLASS® Reinforced Composite System that included a frost-proof tiled depth transition line. Before – PVC Liner SAMPLE PICTORIAL SEQUENCE ON BACK OF THIS PAGE

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Renovation Result

PROJECT HISTORY

CAMP NAWA KWA (GIRL SCOUTS)

POLAND, INDIANA COMPLETION: 2008

PROJECT ASSESSMENT

“PVC Problems.”

Several years ago, the camp owners of this large

outdoor, shot-creted and plastered pool opted to install a

PVC Liner. After some years of use, the liner began

exhibiting unappealing traits such as folds, discolor-

ation, and pinholes resulting in tears and water loss.

Moisture and condensation that transport through the

liner and seep up through the pool shell by hydro static

pressure became trapped. Yearly cycles of trapped

freeze / thawed water damaged the plaster and concrete

surface under the liner, resulting in tearing apart layers

of the subsurface and demonstrating how damage and

corrosion beneath an unbonded sheet lining can proceed

unnoticed for several years. Structure cracks also

affected the pool shell.

“How it was done” RENOVATION PLAN

The deteriorated liner and disintegrating, contaminated

felt material under the liner were cut apart and removed.

Chunks of plaster and concrete damaged by being

trapped under the liner through several years of freeze/

thaw cycling were removed. Following high water

pressure blasting (>5000 psi), and setting up

hydrostatic water pressure relief by diaphragm pumping,

all the structure cracks were permanently sealed with a high-

grade epoxy sealant and InterSteel. Finally, the entire pool

received the INTER-GLASS® Reinforced Composite

System that included a frost-proof tiled depth transition line.

Before – PVC Liner

SAMPLE PICTORIAL SEQUENCE ON BACK OF THIS PAGE

Page 2: Project History - Camp Na Wa Kwa - 4-7-2011 · Title: Microsoft Word - Project History - Camp Na Wa Kwa - 4-7-2011.doc Author: Default Created Date: 11/19/2013 2:55:42 PM

CAMP NAWA KWA (GIRL SCOUTS) POLAND, INDIANA

PROJECT SPECIFICATIONS: TOTAL SQ. FT.: 4,640

POOL SHAPE: LARGE WEDGE

TYPE OF CIRCULATION: CONCRETE GUTTERS

TYPE OF CONSTRUCTION: SHOT-CRETE W/PLASTER LINING COVERED BY PVC LINER

TYPE OF FINISH AFTER RENOVATION: INTER-GLASS

Folds & Discoloration Across the PVC Liner Liner Removal in Progress

Chunks of Broken Concrete Evident Under

the PVC Liner

Disintegrating & Contaminated Felt Backer

Effects on Concrete Under a PVC Liner from

Freeze/Thaw Cycling

Surface Condition Found Under the Liner

After Removal

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