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This information was just passed along to me by one of our reps:

Yes, I have had a contractor remove a fiberglass lining from a plaster pool. He was able to get under the fiberglass and lift it up in sheets.....clean-up was a little greater than paint, but it came up very easy. What amazed me was that they run the fiberglass right over the original tile.

Continue using the 40K psi rotating guns (do NOT stop the rotation). You should be able to cut-in four sides of a square, then get under it and blow it off in sheets.  This is typically the fastest way to remove a fiberglass liner.  Alternatively, you can blast it off like you would a plaster layer or rubber liner (small pulverized pieces). 

I am using a 40,000 psi machine with rotating guns.  So are you saying stop the rotation and make a checker board with cuts then get behind?  Just tring to approach the job with a game plan.  thanks.

You are correct....Fiberglass liners do not come off like masonary but they are removed using 40,000 psi very efficiently.  Depending on how well it is adhered, you can remove in sections (cut-in small sheets in order to get behind it and blow off) or in small pieces.  What kind of shape is the liner in?  What is the average thickness?  On a side note, 40,000 psi has been used to remove fiberglass liners in the chemical storage industry for many years.

I am looking to remove fiberglass lining from inside a gunite pool, curious if anyone has done this before.  I can't see it comming off like masonary.   

Welcome to the newest section to our forum especially set aside for operators who use water jetting for the refurbishment of pools and spas.

Feel free to join in and offer your insight or ask a question.

Is it possible to use hydrodemolition and hydrocutting for typical airdrome works:
- demolition of concrete B40-60, Btb 5.0(concrete for Gomaco complex), to depth of 100mm?
- hydrocutting of temperature extension(expansion) scars in the same concrete, to depth  400mm and width 35mm?
Would it be reasonable to use such a technology for airdromes? 

more info on job please

Try running a solution of caustic through pipe

Depending on the material and thickness of the material, a low flow, ultra high pressure jet using a very fine media can cut a width of .050 or even less. If the jet "manipulator" has the ability and integrity to move the jet in a precision method and controllable speed, the shape and size of the shape can be whatever is needed, provided the material has the strength to hold together minus the cut width.

I hope this helps!
Jenna Alder
NLB Marketing Asst.
alderjr@nlbusa.com