Pool osmosis and blister repairs in Perth
Guide price only, inc GST. Your fixed written price comes after we see your pool.
Fibreglass osmosis blisters need grinding out and rebuilding, not just a topcoat.
We grind each blister back, rebuild it and refinish the surface so it stays fixed.
What osmosis looks like
- Small raised bubbles, often on the floor and lower walls
- Blisters that weep a little when pushed
- A rough, pimply patch where it used to be smooth
- Brown or yellow marks around some blisters
Why a topcoat is not enough
Osmosis happens inside the layers of the fibreglass, not just on top.
Paint over it and the blisters push through again.
Grinding out, drying and rebuilding deals with the cause, not the look.
Our process
- Close-up photos
Send a few of the worst patches with something for scale.
- Look in person
We check how far the blistering goes before pricing.
- Drain-out
Planned around groundwater and disposal rules.
- Grind out
Each blister is opened up and ground back to sound fibreglass.
- Dry and rebuild
The damaged areas are dried and rebuilt in layers.
- Refinish and fill
Patched or full resurface, then fill and balance.
What affects the cost
How many blisters
A handful is a patch job. Widespread osmosis usually means a full resurface.
How deep they go
Deeper damage takes more grinding and rebuilding.
Patch or full surface
Patched spots can show. A full resurface gives an even colour.
Guide prices
Osmosis and blister repairs
Quoted after a look
Guide price only, inc GST. Your fixed written price comes after we see your pool.
Fibreglass resurfacing
From around $12,000
Guide price only, inc GST. Your fixed written price comes after we see your pool.
An empty pool can lift out of the ground
Where groundwater is high, emptying a pool can cause it to lift, or "pop".
That's why we never just pull the plug. Drain-outs are planned around your pool and your block.
Pool water can't go down the sewer in Perth
Water Corporation does not allow domestic pool drainage or backwash into the sewer.
Ask your council how disposal works where you live. Never run it to road drains, a neighbour's place or parkland.
The water is dechlorinated first. We plan the drain-out with you before day one.
Questions people ask about this
Are pool blisters dangerous?
They are not usually a safety issue, but they get worse over time and feel rough.
Leaving them can mean a bigger repair later.
Can I fix blisters myself?
A topcoat or filler from the shop will not fix osmosis.
The blisters need grinding out, drying and rebuilding properly.
Will the repair patches show?
Patch repairs can show a slight colour difference.
If you want an even finish, a full resurface over the repairs fixes that.
Why is the price quoted after a look?
Osmosis can be a few spots or the whole floor. Photos give us a start.
We look in person before writing a fixed price, so you are not paying for a guess.
Can osmosis come back?
Proper grinding, drying and rebuilding gives the repair the best chance.
Keeping your water balanced helps protect the surface too.
How long until we can swim?
Fibreglass resurfacing usually takes about 3 to 7 days on site.
After that comes filling and water balancing before anyone jumps in.
Your written price includes a start-to-swim timeline, so you know roughly when the kids can get back in.