Spa/Hot Tub Spillway Design

[kkbrininstool]

Hi there! We are currently building our pool and they are setting the flagstone for our three spillways.

Can you tell me:
- What is the ideal overhang amount would be?
- Should the spillway be flat/level, angled towards the pool or angled towards the spa/hot tub?

Any other advice is welcome! I’ve seen pics of some waterfalls that look better than others, so want to make sure it’s done correctly. Thanks!

 

[Ahultin]

Have them do a small relief cut at the front underside so that the water is less likely to stick and wrap around

 

[kkbrininstool]

Have them do a small relief cut at the front underside so that the water is less likely to stick and wrap around

Thanks! I’ve seen a lot about that in here when I started looking, but we haven’t seen that done anywhere. Is that in addition to the “side guards” (not sure what else to call them)? Or something people do in place of?

 

[Jimrahbe]

kk,

As Ahultin points out above, without the relief cut under the stone, surface tension will just make some of the water flow under the stone ledge and then it will just dribble down the stone wall. The cut is usually about a 1/4" from the front and about a 1/4" deep and 1/4" wide, all the way across the bottom of the stone.

Thanks,

Jim R.

 

[kkbrininstool]

kk,

As Ahultin points out above, without the relief cut under the stone, surface tension will just make some of the water flow under the stone ledge and then it will just dribble down the stone wall. The cut is usually about a 1/4" from the front and about a 1/4" deep and 1/4" wide, all the way across the bottom of the stone.

Thanks,

Jim R.

Thank you! Do you happen to have a picture of this? I’m pretty sure I’m envisioning it correctly, but just a visual person and curious.

Also, is that still in addition to the side pieces/guards? Any input on if it needs to be flat or angled one way or the other?

 

[Jimrahbe]

kk,

Two different things..

Without the side pieces, water would never make it to the end of the overflow..

Here is a basic idea of the slot... Forget about the dimensions, just trying to show the slot on the bottom of the stone

https://www.researchgate.net/profile/John-Straube/publication/241910119/figure/download/fig13/AS:669091257929728@1536535195036/Drip-edges-and-sloped-sills-are-critical-deflection-elements-Straube-2011.png

Thanks,

Jim R.

 

[kkbrininstool]

kk,

Two different things..

Without the side pieces, water would never make it to the end of the overflow..

Here is a basic idea of the slot... Forget about the dimensions, just trying to show the slot on the bottom of the stone

https://www.researchgate.net/profile/John-Straube/publication/241910119/figure/download/fig13/AS:669091257929728@1536535195036/Drip-edges-and-sloped-sills-are-critical-deflection-elements-Straube-2011.png

Thanks,

Jim R.

That’s what I thought, but wanted to check. This is perfect…thanks! And even shows a bit of an angle. Thank you!