Pool plaster repair underwater (With 5 Best Services)

Pool plaster damaging is ordinary, so don’t worry if you are facing it in your pool. We will provide you complete guide regarding pool plaster repair underwater.

Source: David Battle

Concrete pools are the best swimming pools that are easy to maintain and buy. At the time of repair, you need to look at the pool plaster. If it has any damage or cracks, you can quickly fix it by hiring professional companies. 

The pool’s interior is the dense mortar, water-resistant to water and polish, giving it an excellent look to the concrete surface. The concrete is porous, so plaster gives it stability against water leaking problem. Moreover, it is dense, which has less water permeability. It is hard and considers as a trowel to resist the water.

I hope now you understand the importance of pool plaster. Let’s discuss the repair cost and the most common problems that anyone can face in their pools.

Pool plaster repair cost underwater. 

Plaster repair depends on size type and damage condition. As the pool size increases, the cost of plaster repair increases as professionals charge repair price per foot. However, if the damage is severe, you need to replace the entire plaster; it protects you from frequent repairs. So chose wisely between repair and replastered according to your pool plaster condition.

In case of repairing where your pool may only have a few cracks or stains, the average cost of repair is $2 to $4 per foot. So the final cost of repair depends on your pool size and the number of cracks in the plaster.

Replastering the pool cost more than repairing and the average cost of replacement is between $3 and $5 foot. For an average pool size like 16 x 32 feet, the total cost is 1090 square feet. 

However, the cost depends on the size of the pool. In some cases, many of you have the only concern is with stains that are quickly removed by acid wash. It does not cost much but has the same per foot criteria. If your plaster is ancient, then replastering is the best solution and gives a new look to your swimming pool.

Why do we need to repair pool plaster? 

Plaster is the base layer on the surface, so it has different types of common problems. Here is the list of those problems along with their solutions to repair them.


It is small cluster type cracks. It appears on the top when pool plaster starts shrinking. Pool plaster creates shrinking at the stage when the water inside plaster mix and absorbed during curing. It has minor effects if it appears small, but you need to replicate the whole pool in case of significant craze cracks. 


Many pool plasters develop stains with time, and it is inevitable. Reasons to cause stains over pool plaster are the debris, leaves, or any other organic thing like metals. Repair is easy as acid washing removes all the colors. But if you have any hard stain, then cure depends on the type of it. 


Plaster has colours that tend to fade with time as it has constant exposure to sunlight and water chlorine. If you have traditional pool plaster, it’s familiar to experience a massive difference between colours after 5 to 10 years. However, if you want to reduce fading, then start covering when you are not using the pool. Sanitiser systems also have bleaching effects like chlorine, but some are safe, like bromine.


Delamination means the plague of fresh pool plaster. It occurs when there is a separation between pool plaster and concrete. So you need to prepare the concrete surface before applying the pool plaster correctly. Professionals might fix them with patches if the area is small, but if delamination affects the large characters, replastering is necessary.


Scaling is the result of high water pH, calcium, and alkalinity level. If it increases, minerals in the water also rise, results in body etching after swimming. However, avoid scaling correctly, clean the pool walls, and don’t allow the salt to sit at the bottom surface for a long time.

How to repair pool plaster underwater?

  • Wear swimming pool goggles so you can see underwater.
  • Prepare the edges of cracks or are that you are going to repair with a paint scraper.
  • Properly brush the spot with a wire brush to remove all the debris, algae, and other loose parts. 
  • Mix pool paster outside the water according to your manufacturer’s instructions. 
  • Make a ball of it and take it inside the water.
  • Take a trowel or putty knife and push the plaster inside the crack.
  • Use a trowel to make smooth edges and make it flat against the pool surface.

Top 5 Best Pool Repair Services In The USA

  1. Alan smith pools https://www.alansmithpools.com/
  2. Arturo’s pool plastering https://www.arturospoolplastering.com/
  3. Express pool plastering and repair https://www.expresspoolplastering.com/
  4. Select pool services https://www.expresspoolplastering.com/
  5. Tony marques pool plastering https://tonymarquezpools.com/

Frequently Asked Question:

How much does it cost to Replaster my pool?

Replastering cost depends on the size of your pool. On average, professionals charge $3 to $5 per foot to replaster the swimming pool. So the total amount depends on your pool size and type of plaster.

How long does a plaster pool last?

The life of pool plaster depends on maintenance and water balance. The average life of pool plaster is 15 to 25 years with proper care.

How long after plaster can you fill a pool?

It depends on the type of plaster and the instructions of manufacturers. Mostly pool plaster companies complete the whole process and fill your pool with water. Usually, you can fill your swimming pool with water after 48 to 72 hours of plaster.


Plaster provides the final look to your swimming pool, so it needs to be in well-maintained condition. For better results, hire professional services as they are experts and have years of experience. So they can better guide you and accurately repair your pool plaster. 

I hope this article helps you find the best service or advice to repair your swimming pool plaster. 

Scroll to Top