FACT OR URBAN LEGEND - dark liners

TomTom977

New member
Jun 30, 2014
1
Ontario
Do darker liners actually retain/heat your pool faster?


We switched our liner last year to a much darker one and the difference seems to be substantial. All things being equal, I'm thinking 5 to 7 degrees. Our pool gets alot of sun so I'm thinking that is definitely a factor, as in, I would think a darker pool with full sun all day would accelerate this process. That's my anecdotal 2 cents..
 

Melt In The Sun

TFP Expert
LifeTime Supporter
Oct 29, 2009
3,899
Tucson, AZ
More anecdotal evidence; my pool, with a dark tan color pebble, is substantially warmer than our rental house (white diamondbrite) and the swim teacher's house (light tan pebble). I wouldn't have guessed the difference would be noticeable, but it is.
 

R.J.

Well-known member
Jul 6, 2012
82
Minneapolis
For above ground pools, I wonder if the color of the walls (exterior) would make a difference. It's a large surface area and all the heat absorbed would transfer to all depths of the pool. If I get the guts to paint mine a darker color, I'll let you all know.;)
 

mas985

TFP Expert
LifeTime Supporter
May 3, 2007
12,865
Pleasanton, CA
Remember that dark color also radiates more energy (higher emissivity) so it works against you when the sun goes down. You might get higher temperature gains during the day but it would be offset by higher heat loss at night so the average temperature might not change much. At a minimum, you would want to paint only those surfaces that are illuminated by the sun.