Tile and masonry repair
Loose, cracked or missing waterline and spa tile, plus broken brick, loose stone, failed coping over skimmers and missing mortar. We reset the pieces you saved or find the closest match.
Brentwood, CA · 35+ years · 7,000+ pools
Pool tile and mastic repair around Mount Diablo
Tile falling off the spa wall? Expansion joint cracked and gapping? We repair what you have, match or save the tile whenever we can, and keep your pool out of the remodel bill for years.
- 35+ yearsIn business since 1989
- 7,000+Pools serviced
- ReferralsWhere almost all our work comes from
- #847720California license
What we fix
Repairs that keep your pool looking good
Mastic and expansion joints
We cut out failed sealant and old plastic deck strips and install new self-leveling mastic so water stays out from under your deck and tile.
Faux rock and small repairs
We also handle faux rock touch-up and color restoration on rock waterfalls and water features, plus other small repairs around the pool.
Mastic, start to finish
One expansion joint: before, during and after
Old, failed sealant comes out and new self-leveling mastic goes in, so water stays out from under your deck.
Before you call
Tile fell off? Keep every piece.
Most pool tile is no longer made. Even when it can still be found, a new batch rarely matches the color of tile that has been in the sun for years. The pieces that fell off are often the best match you will ever get, so put them in a bucket and keep them.
Where tile fails first
The spa dam wall, the wall between the spa and the pool, takes the most punishment. Sun and daily hot and cold swings stress the tile bond there more than anywhere else, so that is where most loose tile shows up first.
Why it matters
Keep the pool ready for the grandkids
Your pool is where the family ends up every summer. Loose tile and open joints are easy to put off, but fixing them early keeps the pool looking good, keeps water out from under the deck, and keeps bigger repairs further away.
Meet the owner
Jason, the tile dentist
Jason founded Custom Mastic in 1989. It was the job that paid his way through college, and he never left. The patient, piece-by-piece tile work earned him a nickname with clients: the tile dentist.
You work directly with our team. We look at the problem, explain your options in plain terms, and let you decide.
Read our story
Our work
Real pools we have worked on
Faux rock, finished Faux rock color work Faux rock, finished Faux rock, finished
Service area
Based in Brentwood, working all around Mount Diablo
From Brentwood and Discovery Bay to Danville, Walnut Creek, Lamorinda and the Tri-Valley.