North Shore, the middle and the South ShoreGround or house, settled first(315) 640-3590
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Nassau County

Mold Removal in Hicksville, NY, Under New Floors in 1950s Houses

Planning new flooring in a Hicksville house, or finding mold under a floor that went down recently? An assessment tells you whether the concrete underneath is the source and what has to happen before anything else goes over it. More than half of Hicksville's homes, 57.8 percent, were built in the 1950s, and the USGS well inside the hamlet read the water table 47.35 feet down, so moisture in that concrete comes from the soil right under it, not from an aquifer almost fifty feet below.

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1955is the median year built across Nassau County's 479,044 homes in Census estimates for 2020 to 2024
0.37 ftbelow the surface was the water table at a USGS well on Manhasset Neck in spring 2016
165.27 ftbelow the surface was the water table at a second Manhasset Neck well about 1.3 miles away
Get In Touch

Request a quote in Hicksville

Tell us the town, the lowest level of the house and where the damp is showing. In Nassau that is usually enough to say whether the water is coming up from the ground or out of the house, and which licensed trade the job needs.

Would you rather talk it through? Call (315) 640-3590.

$100credit

$100 off your first job

Credited by us on your first booked job.

  • One credit per customer per property, on your first booked job.
  • Valid through December 31, 2026.
Start Your Quote

Mention this offer when you book. Full terms.

Six quick questions about the house and where the damp is showing, then your details. It takes about a minute.

Question 1What are you dealing with?
Question 2Which part of the county is the house in?

How far down the water sits under a Nassau house changes a great deal from the South Shore to the North Shore hills. Near the bays and harbors it can be close to the surface. Under much of the middle of the island and the hills it is far below the floor, so damp there usually comes from the house itself. The town is enough, and not sure is a fine answer.

Question 3What is the lowest level of the house?

A house built on a concrete slab, a house with a basement and a house over a crawl space get wet in different ways, and the fix is different for each. Many homes in this county were built on slabs with no basement at all.

Question 4Where is it showing up?

Where the damp appears is the first clue to which way the water came. Damp that starts low and spreads up points one way, and damp around a fixture, a window or a ceiling points another.

Question 5How long has this been going on?

Something that got wet in the last day or two can often still be dried. Something that has stayed damp for weeks usually cannot, and the job changes.

Question 6What would you like to happen next?

In New York the company that assesses mold and the company that removes it cannot be the same company on one job, so it helps to know where you want to start.

The house, the damp, and how to reach you

Who should we ask for?

How can we reach you?

We call to confirm the details before anyone is sent out.

Where is the property?

The contractor match is by property, not by person, so the street line matters.

Anything else we should know?

Your $100 credit is attached to this request. Mention this offer when you book. See terms.

Your details are used only to respond to this request and arrange the service.

Planning

Before the new floor goes down in Hicksville

Hicksville is a hamlet in the Town of Oyster Bay, and 93.4 percent of its homes are single detached houses, most of them about seventy years old and on their second or third round of renovation. That is when this problem tends to appear. EPA warns that a floor covering laid on concrete giving off more water vapor than the product allows can fail and grow mold, and it recommends measuring the vapor emission rate first, even decades after the house was built. So before new vinyl, laminate or carpet goes down on a Hicksville slab or basement floor, ask the installer to measure it. If mold is already under a floor, that floor has to come up, the concrete has to dry, and the moisture source has to be named before anything replaces it. Water under a floor can also be a leaking supply or heating line, which makes it a plumber's job first.

North Shore shingle colonial on a wooded hillside with a climbing driveway
Next Step

What is on the floor of your Hicksville house now?

Tell us the flooring, roughly when it went down and where the mold or staining shows. For a Hicksville floor that is most of what the first call needs.

Start Your Quote Call (315) 640-3590
Availability

What we arrange for Hicksville floors and basements

Mold Inspection and Assessment

Find out whether the water behind the mold is coming up from the ground or out of the house itself, and get the scope in writing before anyone quotes for removal.

Mold Inspection in Hicksville →

Mold Remediation and Removal

Have the growth taken out by a licensed remediation firm working to the independent assessor's written plan, with the water that fed it repaired first.

Mold Remediation in Hicksville →

Water Damage Drying and Restoration

Get the water out and the structure dried before mold starts, including the slab, the flooring and the finished basement walls where water hides.

Water Damage Drying in Hicksville →
A booking service, not the contractorWe arrange the job and a separately licensed New York firm carries it out, sets its own price and signs its own agreement with you.
The firm that assesses never removesState law keeps the company that writes the mold plan apart from the company that carries it out, and bars one owner from holding a stake in both on your property.
Every trade licensed and insuredEvery firm we book holds the New York license its part of the work calls for, and you can look any mold license up on the state's own open register.
Local Detail

Hicksville's housing age and well reading

Basement boiler with copper lines and a small drip stain from a slow leak

Census estimates for 2020 to 2024 count 13,565 housing units in Hicksville, 57.8 percent of them built in the 1950s and 81.5 percent before 1960, with 93.4 percent single detached houses, a median year built of 1955 and 39.7 percent of homes heating with fuel oil.

Source: US Census Bureau, American Community Survey 2020-2024 5-year estimates, Hicksville CDP, tables B25034, B25035, B25003, B25024 and B25040, accessed 2026-09-23

USGS well N 1197, inside Hicksville, measured the water table 47.35 feet below the surface on April 18, 2016.

Source: U.S. Geological Survey, Water Data for the Nation, groundwater field measurements, accessed 2026-09-23

EPA states that installing a floor covering on concrete whose water vapor emission rate exceeds the manufacturer's maximum may cause the covering to fail, promote mold growth and void the warranty, and recommends measuring the vapor emission rate before coverings are installed, even long after the building was built.

Source: US Environmental Protection Agency, Moisture Control Guidance for Building Design, Construction and Maintenance (2013), accessed 2026-09-23

Next Step

Send the Hicksville floor details

We look at each request ourselves. If you have not laid the floor yet and a moisture test is all you need, we will tell you that and stop there.

Start Your Quote Call (315) 640-3590
Start Your QuoteCall (315) 640-3590
Start Your Quote