Though I have never actually participated in plastering a pool I have watched the process many times, I would definitely say you need to hire a professional. The steps are ship out all old plaster around drains, Inlets and along the base of the tile. This is so you have something for the new plaster to hold onto. Check all plaster for loose or hollow spots, chip out and remove. Acid wash surface then neutralize. tape all drains and inlets so you can find them later. prepare enough plaster to coat the entire surface, to create a bonding layer, Coat and wait 24 hours. Prepare plaster and apply starting at the tile line and working down make sure you have Golf shoes with long spikes so you can walk across surface of plaster filling back in each step as you go with your finishing trowel. This is where it gets tricky you must complete the whole job before the plaster sets up or dries and immediately start filling pool with a towel wrapped around the end of the hose so not to wear a whole in new plaster, which must be cured under water. Keep in mind the process is much more critical than it sounds, Timing is very important proper preparation is the most important. Hiring a professional is the best solution that's what they do every day.
I may add that it usually takes a crew of 5 to 8 well experienced people to set the plaster and trowel not to mention the crew to mix the proper percentages of ingredients in the right consistency and get it into the backyard.
Replaster!
I general, the answer is yes. It the crack comes from the pool moving, and the gunite has cracked, then the gunite has to be repaired before the plaster. Sometimes opening up the gunite crack and refilling with concrete will answer the problem. If movement of the soil is the problem then that has to be fixed first.The soil getting excessivly wet and dry can mean that the pool will move, if it is only part of the pool then there will be a structuaral crack. Only opening up the crack will tell you whether it is a plaster crack or a gunite crack. A replaster is from about $2000 up and structuaral repairs from about $1000
Hum, not sure if you can actually plaster a fiberglass pool. The glass would have to be removed first. You will have to consult a pool builder, a company that installs fiberglass shells or a company that installs fiberglass in plastered pools - thus converting a gunite/plaster pool into a gunite/fiberglass pool. The later uses the old pool shell as the sub-grade or foundation so to speak. k
As a licensed applicator, I would say your pool is about a 96 perimeter and is about 1040 SF on the internal area. The going price right now is about 3.00 to 3.50 a square foot. You will see prices from 3000.00 to 3700.00 for your pool.
Gunite
No, Gunite is a type of concrete.
Gunite is a trowled-on cement coating similar to stucco.
"Gunite" is a special concrete mix that is sprayed, with a specialized spray gun. Using Gunite requires, by definition, the use of the spray gun.
The former name for gunite is shortcrete. The term gunite is used for spraying concrete or mortar in a wet or dry process using a patented gun type applier.
Gunite is a type of sprayed concrete, and is basically as porous as concrete is.
Our pool installer told us to wet down our gunite once in the morning and once in the evening for seven full days after the gunite is installed.
Pebble sheen is the finish on the surface of a pool gunite is the cement that a pool is constructed from in other words you can finish a gunite pool with pebble sheen.