Mastic and Grout Question

[kmerenda]

I bought this house two years ago, and I believe the pool was built about 15 years before that. I noticed that the expansion joint between the decking and the coping has no sealant in it whatsoever. Around the entire length of the pool and spa, the expansion joint is just empty. There is no sign that mastic was ever there. Was that intentional or has it just deteriorated and I need to quickly fill it back in? Assume
Deck-o-seal would be the go-to Solution?

My other question is on the grout. The grout in the natural stone tile line is deteriorating and falling away in several places. any recommendations on a product to repair that grout would be appreciated.

 

[ajw22]

Expansion joints are often left open. Sometimes, foam is put along the joint during construction and the foam deteriorates over time. It does not need to be sealed.

You have a lot going on in that picture.

The green is grout.

The red is mortar the coping is laid on.

The white is waterline scale.

How deep is the hole at the yellow?

It looks like your coping is coming loose from the mortar.

You can put grout along the edge above the tile but it will eventually crack.

 

[kmerenda]

Expansion joints are often left open. Sometimes, foam is put along the joint during construction and the foam deteriorates over time. It does not need to be sealed.

You have a lot going on in that picture.

The green is grout.

The red is mortar the coping is laid on.

The white is waterline scale.

How deep is the hole at the yellow?

It looks like your coping is coming loose from the mortar.

You can put grout along the edge above the tile but it will eventually crack.

View attachment 645815

The hole at the yellow is maybe 1/2 inch deep. The tiles were horrible with calcium buildup when we bought the place. I had a company sand blast (or whatever media they use) and it’s significantly better, but they said some of it goes through the stone and couldn’t just be cleaned off. So, it’s the red and yellow that I’m worried about most

 

[ajw22]

You can use this grout but your challenge will be mixing it to a color that matches.

Tile

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