My mobile home park is going through this right now, so I will give you what I have learned. A word of caution, I am still trying to find an unbiased answer myself all of my pros/cons come from the fiberglass or plaster contractors so of course they believe their product is better.
From our pool maintenance company (the one unbiased answer I have) They recommend using fiberglass on our Spa to reduce the chance of black algae, and plaster on the pool for the ease of maintenance.
>>Pro's for plaster.
Underwater epoxy repairs can be made without draining the pool.
More resilient than the Gel-Coat of the fiberglass.
More readily available contractors.
>>Pro's for fiberglass.
Resists Black Algae.
Resists rust stains from behind.
Lasts longer than plaster.
---Con's for plaster.
If Black Algae starts its roots go through the pourous plaster and embed in the gunite, and will always return.
Plaster doesn't bond well to old plaster.
---Con's for fiberglass.
Fiberglass companies go out of business because their products fail in a few years.
Fiberglass contractors are hard to find.
The only way to repair fiberglass is to drain the pool and apply a new Gel-Coat over the entire surface.
Fiberglass is not waterproof at all, only the Gel-Coat is.
A Plaster contractor said...
"I have heard that the fiberglass fails in like 5 years and then the company goes out of business."
A Fiberglass contractor said...
"I have heard of huge sections of the plaster falling off, because the old layer of plaster was not completely removed and when it came off it took the new plaster with it, in court the contractor's stance was that their coat held on fine and that it was not their fault since their work was still sticking to the old plaster."
I wish a neurtral party like a university would do a study on this.
Just as lost in the sauce as the original poster.
Either gunite or fiberglass will work well for an indoor pool.
How often should you resurface a gunite pool?
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
Gunite will generally last longer than fibreglass (if you take care of the plaster, and "cure" the gunite properly when it is installed). You can also make a Gunite pool any shape and size that you like, whereas you're limited to the few molds that a fibreglass manufacturer has. Personally, I like the feel of a plaster (gunite) pool on my feet *much* better than paint or fibreglass. The biggest advantage of concrete over fiberglass is the structure. 8in. of concrete and steel versus 3/4 to1in. of fiberglass. I'll take concrete and steel every time. 30 yrs. in the biz. tell me so.
How to resurface a gunite (or concrete) pool with fiberglass is explained in "Pool Resurfacing Made Easy" written in 1999 by Bill Nash, CEO of UGlassIt Pool Resurfacing, Inc. It can be ordered online at uglassit.com/order_book.htm. The company provides all the material and supplies necessary for the resurfacing of all kinds of swimming pools, plus telephone help is available 7 days weekly.
The cost to resurface a gunite pool depends on your location, the size of your pool, and exactly what you want done. On average, as of 2014 it cost between $8,000 and $15,000 to resurface a pool.
there is a product called "pebble tec" that is great. better than both products you mentioned. it is a little more expensive, but looks and lasts much better. other wise i would stay with plaster. from what i understand it adhears better to the gunite.
No. An older (possibly better) type of Fiberglass pool was constructed in this manner, with a concrete/Gunnite/Marcite trowled bottom and Fiberglass panels at the side of the pool. Panels are caulked together along vertical joints. Actually not a bad deal, but caulked joints must be maintained. Once the concrete starts showing through at the bottom of the pool, its time to drain and resurface. Bottom of pool should be acid washed every 3-5 years to keep it sparkling and remove mold, mildew, stains. If bottom surface is chipping off, its getting close to time to resurface bottom of pool. Bottom is treated just like any concrete/gunite/Marcite pool surface. Sides are simply brushed, caulked in timely manner.
A fiberglass pool requires less maintenance, less repairs structurally in the future, is quick to install, and is good for smaller pools. Gunite pools are better for a pool deeper than 8 feet, custom shapes, and is a bit harder on the feet than a fiberglass pool.
No. They should perform equally well in any state that has similar weather conditions.
u can NOT convert one into another.... ud have to rip it out and start over... either gunite or fiberglass
I think gunite, they stay looking good for longer and when they they tart to look a bit lack luster in time you can refurbish them to look like new again far more easily then fiber glass. they also sit in the ground better. however there are many people that are very happy with fiberglass pools.
Gunite can last for decades with good soil conditions. Plaster is the part that needs to be redone periodically, but maintaining proper chemistry will allow your plaster to last much longer.
Gunite and concrete pools can be insulated by resurfacing with fiberglass. Because fiberglass is non-porous, heat is not lost through the plaster finish. If the pool is already fiberglass, there is nothing further that can be done, unless the pool is not yet installed in which case a spray of insulating material can be given to the outside of the fibreglass pool prior to installation.
I am researching the same question and this is what I have found so far: having a "freeze line" is not a good condition for fiberglass pools. Fiberglass pools are cheaper to install and use less chemicals to maintain. I was told the chemicals also do less damage to fiberglass, if any?, than to gunite pools. Fiberglass pools must be filled at all times to avoid "popping up". The only thing that still has me leaning towards gunite is a custom pool shape we have in mind. Hope this helps. I am also trying to decide between fibergalss and gunite. I have been told (by a gunite dealer) that there is a problem with staining in fiberglass pools. Besides a low water level, what else might cause a fiberglass pool to pop up?
Gunite is covered with plaster. It is sprayed on concrete sorta. They mix it in the hoses and it is blown on. You can go to youtube and see them gunite a pool. I am only aware of plaster, vinyl or painted pool surfaces. The vinyl is just like thin rubber.
gunite is a type of sprayed sand cement used for the bottoms and sides of pools then fiberglass panels are fitted in to form the complete side to the top Fiberglass pools are also produced as complete pools and shipped to site by truck. the obvious difference here is that one pool is made from reinforced cement "Gunite", reinforced concrete, "shotcrete" and reinforced fiberglass and all kinds of systems in between.
The finish plaster is normally white all the way through. It sounds like you are dealing with a pool that has been replastered by the method of putting a "brown coat"/"scratch coat" (the gray plaster you noted) over the original finish plaster surface, and a new finish coat of white plaster on top of that. The scratch coat more like a thin concrete than plaster (doesn't have the white marble dust in it) and is used to get a better bond to the old surface.
If your builder knows what he is doing it should be waterproofGunite is not waterproof on its own. It needs a final waterproofing by means of plaster or paint.
Both pools have many features Both fiberglass and gunite swimming pools can have almost all the same custom accessories and great equipment. You can design any size or shape gunite pool shell and customize the surface to almost any color quite easily. A fiberglass pool shell manufacturer is like a boat dealer with a catalog of models produced and custom sizes are generally not available. A fiberglass pool can be installed a bit faster than a gunite pool but the major investment you will make in either project usually never warrants a decision based on a few weeks time built sooner. Your gunite pool can have a built in hot tub or water feature , but your fiberglass pool can also. You have more options with coping on a gunite pool than fiberglass, but your fiberglass pool can still be made to look like a gunite pool if you like. A fiberglass pool shell can have a lifetime warranty for factory defects and most gunite builders also offer a similar warranty, I always say though when is the last time you saw a defective bag of concrete or tub of fiberglass resin? The surfaces of both pools can be as diverse as the pools themselves, you can go with white polyester gel coat on fiberglass or white marcite on gunite, your choice can be a custom quartz finish with a fiberglass pool or a custom quartz finish with a gunite shell also, with each pool shell having a respective warranty for finish from as little as one year to as many as 10 full years or more. Both finishes are very dependent on your skills as a pool-owner to manage them, all information you learned when you bought your pool from a licensed , insured swimming pool professional. Fiberglass pool shells rarely get deeper than 8 foot the minimum standard for a diving pool, while a custom shell with gunite can be built to exceed many standards. The old myths of falty fiberglass and gunite swimming pools have been propagated by dealers long since gone out of business. If your looking for a reliable and safe pool that keeps its value backed by strong dealer sales and service networks fiberglass and gunite are equally great choices and readily available. It's never been a better time to be in the circle of pool ownership. getapool.com good swimming
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
The paint may be sandblasted off, Then just re-paint or marblelite
By Gunite I assume that you were told you have a gunite pool, The gunite part is the foundation of the pool and does not require watering. The surface which is plaster over the top of the gunite needs water. If you just had your pool replastered in the last couple of days it is critical to fill it with water so the plaster can dry. If your plaster is older and been under water before a few days is not going to hurt. Although you do want to get it full of water as soon as possible. Kenny Kummer Brody Chemical
Advantages of fiberglass versus gunite(concrete) There are many things such as lifetime structure warranty, very low maintenance, cheaper heating costs, and they can be moved. Disadvantages would be depth, size, and finish colors even though there are many colors available for fiberglass pools. Viking Fiberglass pools are the most expensive but you know the saying you get what you pay for. In the northeast you have more of a chance of having a fiberglass pool pop out of the ground. I have always perfered gunite over any other finish (even vinyl) I think the look is lush but again you do get what you pay for. Which is why gunite is more expensive.
Break out the old plaster and plaster over the area to seal the plaster surface. It is best to lower water level in the pool first but there are patch materials that work under water.