Blisters on steps and 8ft tub?

[haybird]

Hi
I did a search but didn't find any information. Does anyone else have blisters on there fibreglass steps or tub? I am getting lots of little bubble like blisters retailer tells me it happens but can't say why. They don't leak yet. Any insight would be appreciated
Thanks

 

[pooldv]

It is called osmotic blistering.

 

[gwegan]

And it shouldn't be happening. It means they didn't construct their steps correctly. Are the steps fairly new?

 

[haybird]

Hi
Thanks for the reply...I use to get a email if somebody replied I figured nobody did. The steps are about 10 years old. Started noticing bubbles year 8.