They are the critical buffer between pool decks on one side and the tile line coping and mortar bed on the other.
Concrete pool deck expansion joints.
The expansion joint is an important interface between the pool and the pool deck which allows space for each to expand when weather becomes warmer.
It fits all deck o joint expansion joints or any other 5 8 wide joint.
This gives the concrete time to settle and assume its permanent structure.
Expansion joints are used to allow the slab to move and not put stress on whatever it abuts.
Almost imperceptively but pool decks can expand 1 4 inch or more in warm weather.
A concrete slab will grow laterally as the weather gets warmer.
The expansion joint between the coping and the deck is typically caulked or filled with elastomeric sealant approximately 30 days after the concrete was originally poured.
These joint are placed where a slab meets a building where a slab meets another slab and where a pool deck meets the coping.
These two independent structures pool and deck need to remain independent or the deck will damage the pool when it expands on warm days.
Expansion joints are put in place before the concrete is poured.
The expansion joint around your pool allows for the pool deck and the pool itself to expand when the weather gets hot.
If it is caulked before then it may not align properly.