We often hear pool owners question whether they should be able to see the seams in their liner.
The answer is yes. Every liner has seams, at least every six feet, and they are more visible on some patterns than on others. In the old days, when all patterns were on blue base film, you could not really see the seams since there was less ink coverage. Today, when most all patterns are on white base film, the seams are more visible, but the less ink there is, the less noticeable they are.
We advise that you wait until the pool is filled before you worry about the seams. While they are always there, they are much less noticeable under three feet of water.
The liner pictured below (pattern: Robertson) is a good example of visible liner seams on a properly manufactured liner. The seams on the floor are barely visible. The vertical seam is razor thin, perfectly straight and the tile is matched almost perfectly at the top.
Bottom of pool (below):
Pictured below is Morrison, one of our most popular patterns. If you look closely, you can see two liner seams in the shallow end of the pool. The Morrison pattern has one of the most visible liner seams out of all of our patterns. That being said, you will notice that the seams are barely visible, especially if standing 10 feet away and if the pool is filled with water.
In the picture below, you can see a seam across the bottom of an unfilled pool (pattern: McDowell).
Below, we present you with the McDowell pattern again in a pool completely filled with water. From this viewpoint, it is impossible to notice any liner seams.
Pictured below are two more examples of highly visible liner seams on properly installed pool liners.
Homeowners often ask if there is any difference between a replacement vinyl liner and a liner installed with new pool kits.
There is no difference between a liner that is made as a replacement and a liner that ships with a new pool. The materials and method of manufacturing are identical.
We make liners every day for both new and existing pools and we never ask the dealer if the order is for a new or existing pool.
As for the thickness of the material, you can order a 20 mil liner or a 27 mil liner for either a new or existing pool. Both are available; it just depends on the pattern or thickness you choose. For our comments on which material to choose, read further: Which liner thickness should you choose?
We recently had a homeowner ask us the following question: If given the model number, can you match a pool liner pattern to a Foxx pool?
This is a great question. We do have standard drawings for Foxx brand pools and we make them every day. We cannot use the model number, but we can use the drawing number if you have that. Give us whatever information you have, and we will be happy to locate a drawing if we can.
In the same way, we actually have hundreds of drawings for pools by most manufacturers dating all the way back to the 1960s. The problem is, how do you know if your pool was built to the plan? This is especially true with Kidneys, Lazy Ells and Freeform shapes. The length and width may match, but what about the size of the radius turns? Even on a rectangle pool, you have to check diagonals to make sure that the pool was built square.
Another problem is that years ago, we made liners by hand, and dealers would routinely over dig the pool to make the liner fit tighter. Today, with auto-cad technology, we make liners with very little “shrink” factor. Even if a stock liner fit years ago, that does not necessarily mean that it will fit today.
We often tell our dealers that the fastest way to lose a few thousand dollars is to order a liner per an original drawing without taking your own measurements. This often entails using the AB method to triangulate the perimeter.
The original drawing can be a good reference tool, but don’t order by it. If you do, you may be looking at liner wrinkles in your backyard for the next seven years. Always pay your local pool professional his fee to measure your pool and be responsible for getting you a liner that fits properly.
Here’s a question that just came up today. One of our dealer’s reported that a homeowner’s pool turned green with algae in August, so he added algaecide. All the algae turned brown and fell to the floor, like it is supposed to, but when he vacuumed it up he had brown stains left in certain areas. The stains are the same light brown color as the dead algae but appear to be glued to the liner and are rough to the touch. He tried scrubbing and rubbing, but nothing would remove these stains. As soon as I saw the photo (see below) it confirmed what I suspected. Pool Goo or Pool Tar. I recognized it because the same thing happened to my dad’s pool a few years ago.
The good news is that “pool tar” is not a big problem. It will resolve itself given time. As you can read below in a report from a vinyl manufacturer, plasticizer has come out of the vinyl. It is a sticky, gooey substance that attracts whatever dirt is in the pool and over time, under normal operation, the material is re-absorbed into the vinyl and the stains appear to vanish. I think it may have taken six months to clear up on my dad’s liner, but it does go away. I usually hear about this showing up when the pool is opened in the spring. That makes a lot of sense in that most winterizing kits contain algaecide, and that combined with a high chlorine level seems to create the problem. Do not try to remove the stain aggressively; this may permanently damage the liner. Just give it time.
* The following article comes from the Technical Manual of Canadian General-Tower Limited, a manufacturer of the vinyl sheet used to make pool liners.
Sticky Substances on Vinyl Liner commonly referred to as “Pool Tar” or “Pool Goo”
The consensus in the pool industry is that there are several sources of sticky substances, often referred to as “pool goo” or “pool tar” that adhere to and coat portions of the vinyl pool liner.
Some of these sources are:
1. Algaecide-humate or Quat-humate formed from the interaction of quaternary ammonum compound used in some algaecides and decaying organic material such as leaves, grass, insects, etc.
2. Interaction of quat algaecides with other substances. Even chlorine can interact with quats to form sticky material if both chlorine and algaecide exceed the recommended dosage levels. Quats can easily come in contact with high chlorine levels in automatic chlorinators, resulting in a gummy material gradually being fed into the pool, where it eventually precipitates on the liner. Many quat containers are labelled with cautionary notes warning against mixing with pool water having high chlorine concentrations.
3. Chlorinator goo can form when organic material from cosmetics, tanning lotions, etc. are oxidized by high chlorine concentrations resulting in a beige, waxy material.
4. A light coating of vinyl plasticizer may exude to the surface of newly installed liners during the first idle period of winterization. This material is clear and only turns dark if contaminated with dirt. It is attributed to lack of circulation, since it has never been observed in a pool that has been circulated over the winter. It will almost always re-absorb in two or three weeks if the water is allowed to warm up and is circulated and shocked with chlorine every couple of days. The problem is not known to occur more than once in the life of a liner and always the first time the pool is re-opened after winterization.
5. Pool scum is a ring that forms aroudn the pool at the water line and is made up of soil, contaminants from suntan lotion, environmental pollution, and organic materials from bather load, etc.
The following procedure has been recommended by experts in the pool industry as being effective in eliminating “pool goo” or “pool tar” problems.
1. Stop using quaternary algaecides.
2. Reduce and maintain pH at 7.0 – 7.2.
3. Superchlorinate every other day to 6.0 – 8.0 ppm.
4. Use heater to speed up warming of water, if available.
5. Continue to circulate water and monitor pressure on filter.
6. Backwash filter as often as required.
If you own a concrete inground pool and are wondering if it is possible to install a vinyl liner in your pool, the answer is yes, but we don’t suggest it.
Installing a vinyl liner is perhaps the most inexpensive way to fix a leaking concrete inground pool, but converting a beautiful concrete pool into a liner type pool should be the last resort. We encourage you to repair your concrete pool if you can.
If you decide you must convert your pool, it requires accurately measuring the pool for a liner, installing a bead receiver around the perimeter and then converting the skimmer and other fittings to the liner type that have faceplates and gaskets.
The difficulty of the conversion depends on the internal shape of the pool, whether the contours in the floor are rounded or sharp, and if you have internal steps or other obstacles.
Every job is different so depend on your local pool contractor to advise if your particular installation is a good candidate for a conversion.
When homeowners visit our website, www.mcewenindustries.com, they often wonder if the liner pattern pictures they are viewing are true to life of the actual vinyl material.
All of our liners today have the floor pattern coming all the way up the sidewall to the bottom of the tile. When you look at the pictures of our patterns on our website or on our pattern chart, that’s exactly what you will see in the pool. Homeowners who purchased liners from McEwen Industries several years back may have purchased a pattern that had a solid blue or white sidewall in between the floor and the tile border.
Today, all of those patterns that had the solid color sidewall have been discontinued in response to consumer preference. As we started offering more and more patterns with the floor pattern coming up to the tile, the solid color sidewall patterns just dropped in popularity.
Another reason the solid color sidewall patterns were discontinued was that the solid sidewall would sometimes get stretched onto the floor during installation, resulting in a messy appearance. With the floor pattern coming all the way up to the tile, that’s no longer a concern.
Visit our website and check out our liner patterns – what you see is what you get.
Oftentimes people ask us which liner material is “better:” the 20 mil or the 27 mil?
In reality, there is no “better” liner. The most important choice is not the thickness of the material, but the liner pattern that you choose.
Choose the vinyl liner pattern that you like the best. If it comes in 27 mil at no extra charge, take it, but don’t pay extra for it. You shouldn’t pass on your first pattern choice just to get the thicker material. In our opinion, there is no meaningful advantage to thicker material. There is no difference in wear, durability, longevity or warranty.
Liners fail for two reasons. The ink fades or the material dry rots above the waterline. Thicker material solves neither of these problems.
Most importantly, choose a vinyl liner pattern that speaks to you. You are going to be looking at that pattern in your backyard for at least the next seven years. Ultimately, the pattern you choose should outweigh the thickness of your liner material. It is what you think looks the best that matters.
Here at McEwen Industries, we are always searching for new ways to educate our dealers and consumers about issues in the inground pool liner industry. We have developed this blog as an interactive forum between our company, our dealers, and current and prospective pool owners – a place to discover and discuss hints and tips regarding inground pool liners.
McEwen Industries supplies quality pool products to professionals in the swimming pool industry. While we love working with swimming pool dealers, we look forward to sharing our pool liner knowledge to those not in the industry. Within this blog, we will concentrate on the homeowners looking to purchase a vinyl pool liner or homeowners looking for tips to maintain or replace their current pool liner. We take pride in our extensive swimming pool knowledge and expertise, and we want you to be in the know as well.
Please stop by from time to time to check out our latest post. We will continually update our blog and keep it swimming with an abundance of useful information. We appreciate your interest in inground pool liners and look forward to keeping you updated.
Please feel free to leave comments and ask us any questions that you might have.