Many of our Los Angeles concerned customers that call our Mold Call Center have lots of questions regarding the potential dangers of mold that they have just discovered under their sink.

Sinks are dark – and by adding just a little water, it’s a perfect breeding ground for molds to grow. So, let’s get right into answering the common questions!

How dangerous is it Twins? I’m freaking out. – Tina L., Pasadena, CA

Everyone reacts to molds differently, this depends on several factors.

  1. The individual’s immune system – weak or strong.
  2. Your Age – elderly & children are more susceptible to react.
  3. The type of mold that’s under the sink, and how far it’s migrated.
  4. Are you smelling musty damp odors? That’s the off gas that the mold is omitting, and this is a sign that it’s airborne.

Should I just keep my cabinets closed until treated? – Byron W., Long Beach, CA

We recommend this, because every time you open and close them, it creates a wind effect or draft. Depending on how contaminated it is, those spores can cross contaminate into the other spaces of the home causing secondary issues.

How do I find out what caused the mold under my sink? – Mary W., Woodland Hills, CA

This is very important, because under a kitchen sink there are over 50 potential sources – from fresh water to drain water – that can produce leaks. A bathroom sink has a little less, but is used more often.

Very strategic water tests have to be ran, along with caulking static water tests, in order to pinpoint the water source if it’s not obvious.

There are five typical causes to getting black mold under a sink, you can read about them in our previous blog post!

Should I test it to see what type of mold it is? – Donna G., Thousand Oaks, CA

We believe here that if it’s visible, there is no reason to test. Put the money into treating, and test it after it’s removed to verify that it is completely removed.

If your a renter, and you need it for documentation, then absolutely perform a pre-test.

Does a mold removal company find the leak, fix the leak and do the mold treatment under the sink? – Pam W., Van Nuys, CA

There are very few mold companies that will detect the leak, fix the leak & repair your dry wall or cabinets during a mold removal process.

Here at the Twin Home Experts, we perform them all in one call. Customers appreciate it and feel secure with everything under one warranty.

Do you have to rip out my cabinets in order to remove the mold? – Elaine C., Glendale, CA

This is all depends on a few things:

  1. How far the leak and mold have spread.
  2. What was the cause of the leak – drain or fresh water? With drain water, it has to be treated separately with an antibacterial.
  3. How compromised is the cabinet? Is it coming apart due to saturation?

*Most often, we treat by just removing the bottom of the cabinet, removing the dishwasher and possibly the back wall, along with the toe kicks. This saves major destruction and cost.

Do I have to leave my home while the work is being done? – Linda A., Whittier, CA


We build a tight sealed containment around the the work area using a thick antimicrobial plastic with HEPA filtration in place to capture any potential spores that are released in the air.

I do not want this to ever happen again, how do I prevent it? – James Z., Santa Monica, CA

We are BIG believers in prevention here at Twin Home Experts.

We developed a prevention kit with water proofing the entire space under the sink and adding a water alarm. We also recommend frequent inspections while grabbing items, just take a quick look with a bright flash light periodically.

How much does mold removal cost for under my sink? – Kayla J., West Hollywood, CA

This will all depend on what type water leak (fresh or drain water), how long the leak has occurred, how much moisture there is, how far the mold spread and what type of dishwasher and materials you have.

We have completed over 2,600 “under the sink” mold treatments. The prices range from a high investment of $4,900 to a low of $450.

Does insurance cover mold under sinks? – Beth, Santa Clarita, CA

Check your policy, or you can contact your agent to see if you have coverage. Most often. it is uncovered in the Insurance’s eyes because it’s considered a long term event.

Insurance coverages are based on a sudden incidental loss. For example, if you had a “pipe burst” then insurance more than likely will cover all the damages.


Mold can be very dangerous, and should be investigated properly to determine the extent of the damage.

There are certain molds, like Stachybotrys and Aspergillosis, that are very toxic molds that are typically found under sinks.

If you have any further questions, please contact the Twins, we’re here to help!

As always, thank you for visiting our site today.