Sam_Brooks
New member
I see mixed opinions about using a pool pillow under the cover for winter. Does it actually help with ice expansion?
Is a pool pillow really necessary for winter?
- Thread starter Sam_Brooks
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Sean Whitaker
Member
I didn’t bother with a pool pillow the first year I closed my pool. Everyone online seemed split on it, and I figured since I had a decent winter cover, I’d be fine. That winter ended up being colder than usual, and we had a bunch of snow and freezing rain. When I opened the pool in the spring, the liner near one end looked stretched, and one of the rails had shifted slightly. Nothing major, but enough to make me regret skipping it.
The next season, I used a pillow, and while yeah, it deflated a little by the end of winter, I could see how it helped. The ice wasn’t pushing outward as much, and the weight seemed more evenly distributed under the cover. I also noticed way less water pooling on top. Since then, I’ve made it part of my regular winter prep, and it’s cheap, takes five minutes to set up, and gives me peace of mind.
So no, it’s probably not required, especially in milder climates, but if you get hard freezes or heavy snow where you are, I’d say it’s a smart extra step. For me, the small effort upfront has saved me more trouble later.
The next season, I used a pillow, and while yeah, it deflated a little by the end of winter, I could see how it helped. The ice wasn’t pushing outward as much, and the weight seemed more evenly distributed under the cover. I also noticed way less water pooling on top. Since then, I’ve made it part of my regular winter prep, and it’s cheap, takes five minutes to set up, and gives me peace of mind.
So no, it’s probably not required, especially in milder climates, but if you get hard freezes or heavy snow where you are, I’d say it’s a smart extra step. For me, the small effort upfront has saved me more trouble later.
Mark Davis
Member
Yeah, pool pillows can actually make a difference especially if you live in a region where your pool surface freezes during winter. The idea behind a pool pillow is to absorb the pressure from expanding ice so it doesn’t push out against your pool walls and cause damage, especially with above-ground pools. It creates a buffer zone in the center that allows ice to compress inward rather than outward.
That said, it’s not a miracle fix. A properly secured cover and balanced water are just as important. If your pool is well-prepped for winter and you use a pillow correctly (centered and inflated about 60–70% so it can flex), it can help reduce stress on the liner and walls. Some folks skip it and are fine, but if your winters are harsh, it’s a small investment that adds an extra layer of protectio
That said, it’s not a miracle fix. A properly secured cover and balanced water are just as important. If your pool is well-prepped for winter and you use a pillow correctly (centered and inflated about 60–70% so it can flex), it can help reduce stress on the liner and walls. Some folks skip it and are fine, but if your winters are harsh, it’s a small investment that adds an extra layer of protectio
Michael Williams
New member
If you regularly get thick ice or heavy snow, it can be useful as a “buffer” that encourages ice pressure to push toward the center instead of against the pool walls. If your winters are mild and your cover/support setup is already solid, plenty of people do fine without one. The bigger priorities are closing with clean water, properly winterizing the lines, keeping the water level where it should be, and having the cover tight so rain/snow load doesn’t sag and stretch it.
Henry Graham
Member
I skipped the pillow my first couple seasons and the pool survived, so it’s definitely not something every pool absolutely needs. But after dealing with a sagging cover and a huge ice sheet one winter, I started using one and it did make the whole setup behave better.
The biggest difference I noticed was how the cover sat during freezing weather. Without a pillow the cover would dip and rainwater would collect in the middle, which eventually turned into a heavy ice bowl. With the pillow pushing the cover upward a bit, water tends to run toward the edges instead of sitting in one spot.
It also gives the ice somewhere to expand toward. Ice naturally pushes outward as it thickens, and the pillow creates a softer center area so the pressure isn’t all directed toward the pool walls or rails. It doesn’t completely stop ice pressure, but it changes how that force spreads out across the surface.
One small tip if you use one is not to inflate it all the way. I usually leave it a little soft so it can compress as the ice forms. If it’s rock hard it can pop early in the winter and then it’s basically doing nothing the rest of the season.
So yeah, not strictly required, especially in mild climates, but in places with real freeze cycles it’s a pretty cheap piece of insurance. Curious if most people here are using them mainly for ice pressure or more to keep the cover from sagging under rain and snow.
The biggest difference I noticed was how the cover sat during freezing weather. Without a pillow the cover would dip and rainwater would collect in the middle, which eventually turned into a heavy ice bowl. With the pillow pushing the cover upward a bit, water tends to run toward the edges instead of sitting in one spot.
It also gives the ice somewhere to expand toward. Ice naturally pushes outward as it thickens, and the pillow creates a softer center area so the pressure isn’t all directed toward the pool walls or rails. It doesn’t completely stop ice pressure, but it changes how that force spreads out across the surface.
One small tip if you use one is not to inflate it all the way. I usually leave it a little soft so it can compress as the ice forms. If it’s rock hard it can pop early in the winter and then it’s basically doing nothing the rest of the season.
So yeah, not strictly required, especially in mild climates, but in places with real freeze cycles it’s a pretty cheap piece of insurance. Curious if most people here are using them mainly for ice pressure or more to keep the cover from sagging under rain and snow.
Katherine Morgan
Member
I went a couple winters without one and the pool was technically fine, so it’s not like the pillow is some magic requirement. But I did notice the difference once I started using one, mostly with how the cover behaves through the season.
Without a pillow my cover always ended up forming a low spot in the middle. Rain and melting snow would collect there, then freeze into a big ice disk that just kept getting heavier. The following spring my cover had stretched a bit and the waterline area had a lot more debris sitting there. After adding a pillow the cover had more of a peak in the center, so water would run off toward the edges instead of sitting in one place.
Another small thing is ice movement. When the surface freezes solid, the sheet of ice expands and shifts a little during thaw cycles. Having that soft center area seems to give it somewhere to move instead of all that pressure pushing toward the walls or rails. Hard to measure exactly, but the pool structure just feels less stressed during those deep freeze weeks.
One trick that helped me was tying the pillow across in an X pattern so it actually stays centered. The first time I used one it drifted to the side by January and wasn’t doing much. Curious if other people here anchor theirs or just let it float.
Without a pillow my cover always ended up forming a low spot in the middle. Rain and melting snow would collect there, then freeze into a big ice disk that just kept getting heavier. The following spring my cover had stretched a bit and the waterline area had a lot more debris sitting there. After adding a pillow the cover had more of a peak in the center, so water would run off toward the edges instead of sitting in one place.
Another small thing is ice movement. When the surface freezes solid, the sheet of ice expands and shifts a little during thaw cycles. Having that soft center area seems to give it somewhere to move instead of all that pressure pushing toward the walls or rails. Hard to measure exactly, but the pool structure just feels less stressed during those deep freeze weeks.
One trick that helped me was tying the pillow across in an X pattern so it actually stays centered. The first time I used one it drifted to the side by January and wasn’t doing much. Curious if other people here anchor theirs or just let it float.
Reading this thread as someone who just went through their first winter without a pillow and yeah, dont skip the pillow. Had a ton of water pooled on my cover and now my cover clips are all bent from the weight. Plus Im pretty sure the ice expansion cracked one of my coping stones. Live and learn I guess.
Already ordered two pillows for next year.
Already ordered two pillows for next year.