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Question DetailsAsked on 11/27/2017

Mox
cost to fiberglas a swimming pool, 26,000 gal

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Depends on a lot of things - as this following Angies List article spells out -


https://www.angieslist.com/articles/h...


Are you talking new fiberglass in an existing gunite or shotcrete or cast concrete pool, or refinishing an existing fiberglass pool - so crack fiberglass repair and a new gel coat only ? In the old days (60's and 70's) they used to fiberglass existing concrete and gunite pools, especially when water started getting real expensive in the Colorado River Water Project boundaries - don't live in a pool area now so I can't say if that is even done today with fiberglass, though of course various sprayed "plastic" and polymers are used as pool finishes.


New fiberglass pools these days are at least usually shipped as factory-made shells for around $10-25,000 each (plus accessories, plumbing, fencing, deck, installation, etc) prefabricated and ready to drop in the ground - but one of them would not fit your existing pool, and I can't imagine it is economic to get one made to fit and drop in and then grout the small intervening space.


A quick web look at some vendor websites for a re-gel job on an existing fiberglass pool shows around $5000-7000 is a common number for a normal sized pool without major damage, on up to $10,000 range for larger ones - yours is roughly mid-range in size.


If you are talking upgrading an existing concrete or gunite or shotcreted pool, you have several options - grind and smooth-coat plaster it (not normal "plaster", but related and called that), regunite and smooth-trowel it, or sandblast or grind (depending on roughness) the existing surface and epoxy coat it (not necessarily epoxy as such - there are various high-end finishes available for pools today). Those can typically run from about $3-5/SF (of actual pool shell surface area) for the grout/gunite/plaster finishes to more like $5-10/SF for the high-end epoxy and polymer finishes - so in some cases can cost as much as a whole new troweled concrete or gunite pool.


And of course the economy solution, for sometimes as low as $1000 or two, is a vinyl liner - which makes it look like an in-ground version of an above-ground pool - holds water but not real pretty and subject to being torn and sun aging.


One VERY important thing to consider is whether your pool can safely be dewatered to allow for open-air resurfacing (some epoxies can be done underwater, but VERY rare to do an entire pool that way). Many pools are installed in dewatered excavations and anchored down before filling and filled before turning off the pumps and allowing groundwater level to come back up, but can pop up out of the ground if dewatered down the line without first pumping down the groundwater level around the pool - which in itself can sometimes damage the pool lining because dewatering changes the ground support around the pool shell.


Whatever route you go (and you many want to talk to a number of reps about options, each one pushing their own favorite) and possibly after talking to friends or neighbors who have had this sort of refinishing done, you will need to get a VERY high quality contractor with a long number of years doing pool refinishing so you can hopefully get an expert job, rather than something which may look worse than what you started with. And document the heck out of the before and after conditions, from around and from down inside the dewatered pool, as possible evidence in case the job goes south.


Ditto to leakage/topping off quantities before if leakage is the reason for this - and of course if leakage is the problem great care should be taken to ensure it is the shell leaking, not evaporation or pipe leakage causing the problem.


If plopping down a lot of bucks for a rehab, you might even pay to have a Home Inspector or similar totally independent person come and take photos and document the pre-repair conditions (without the contractor knowing about it, to avoid generating bad feelings) as a possible witness if needed - because this sort of job goes bad all too often because there are a lot of inexperienced / incompetent pool repair people out there - cheap to get into the business without competent experience, and commonly does not require professional licensing or bonding or such with the state to get into the business.


Good Luck - and keep in mind alternative options like grouted drop-in shell or total relining the existing concrete/gunite rather than refinishing - sometimes is cheaper than a pricey synthetic finish, if the reason for this is not to get rid of the rough interior surface.

Answered 11 months ago by LCD




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