Step-by-Step Account of Fiberglass Pool Crack Repair

[Bosco390]

Thanks, nefretrameses... It has lasted thus far, and still looks great a year later. And yes, I DID sand the rough fiberglass before starting the GelCoat... I should have included that step. Oh, and if I had air tools, absolutely I would have used them... just used what I have... in hindsight, probably wasn't the wisest move to be standing in butt-deep water using powertools... but I was determined to get 'er done. Thanks so much for the positive comments!!!

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[PoolDoc]

I'm moving this thread to sticky status, for both fiberglass pools and steps. I'm going to add some notes about FG steps, following this post.

Tap Plastics (http://tapplastics.com/) has some helpful videos:

FG repair
Gelcoat repair 1
Gelcoat repair 2

In many cases, if you want to tackle FG repair, you can find what you need at Lowes, Home Depot, or a local boat supply outlet.

Amazon also sells products that will work in many cases:

Gel-coat repair kit
Fiberglass repair kit

[PoolDoc]

Repairing the prefabricated fiberglass pool steps, used in vinyl pools, has a number of elements in common with the repair Bosco completed. But when reading information from various sources, it seems there's an additional complication: structural support of the steps from underneath!

Apparently step failures can be divided into 2 main groups:

* Non-structural failures, that are often just gel-coat cracks or problems.
* Structural failures that related to the loss of support from UNDERNEATH the step.

In the first case, the solution is a straight-forward gel coat repair. The Tap Plastics videos seem to cover this well.

But in the second case, repairing the steps without resolving the loss of structural support UNDER the steps is likely to result in a short-lived repair.

The two solutions reported as successful were (a) use of expanding foam to fill in under the steps, and (b) use of round river gravel or pea gravel to fill. Obviously expanding foam can't fill in very large voids, but can be used in the case of smaller ones. If you use foam, be VERY careful to know what you are doing; these products can be tricky to use. Some expanding foams could actually damage your steps if you use too much.

This site seems helpful to have helpful information: www.aeromarineproducts.com/boat-foam.htm