My crawlspace is already sealed. Why is the humidity still high?

Sealing the vents without drying the space traps the moisture that is already there and whatever continues to come up through the soil. A sealed crawlspace needs a properly sealed ground barrier and conditioned air. One without the other reads high.

How do I know if my dehumidifier is the right size?

We measure the crawlspace, check the unit's rated capacity, and take readings over the space. If it is undersized or the condensate is not draining, that shows up quickly and we will tell you what the space actually needs.

Is my home too new to need this work?

Age is not the deciding factor here. Readings are. Plenty of Daniel Island homes under fifteen years old have unsealed ground cover and high humidity. The inspection is free, so the honest way to answer is to look.

Spray foam insulation applied to the subfloor of a raised Charleston home

Daniel Island, SC

Crawlspace Services on Daniel Island, SC

Daniel Island is newer construction surrounded by water on every side. The crawlspaces here are cleaner than most, and the problems are different: sealed vents without conditioning, undersized dehumidifiers, and unsealed builder plastic. We measure before we recommend.

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Licensed & Insured
Every Job Photo-Documented
Honest Recommendations Only
Serving the Lowcountry

What we do in Daniel Island

Crawlspace Cleanouts

Even newer homes collect construction scrap and loose plastic under the floor. We clear it so the space can be sealed correctly.

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Vapor Barrier Installation

Builder ground cover here is typically thin and unsealed. Replacing it with an overlapped, sealed barrier is often the whole fix.

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Crawlspace Encapsulation

Many Daniel Island homes were built with closed or partially closed crawlspaces. If yours is sealed without conditioning, encapsulation done right is the correction.

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Insulation Removal

Where humidity has been high, batts and duct insulation come down. We remove what has failed and document the subfloor condition first.

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Crawl Space Dehumidifiers

Undersized units are the most common issue we find here. We size to the actual square footage and route condensate properly.

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CL-100 Repairs

Even newer homes flag moisture findings. We perform the CL-100 moisture corrections and hand your inspector clear documentation.

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Local conditions

Why newer homes here still read high

Daniel Island is surrounded by the Wando and the Cooper. Dew points stay high through the warm months, and a crawlspace that is sealed at the vents but never conditioned has no way to shed the moisture already inside it. That is the single most common condition we find on this island.

The second is equipment that was sized for a brochure rather than a house. A small dehumidifier in a large sealed crawlspace runs constantly and still loses ground, and the homeowner assumes the space is being handled.

The good news is that these crawlspaces are usually accessible, well framed, and clean. Corrections here tend to be precise rather than heavy: seal the ground properly, close the gaps, and match the equipment to the volume.

Black vapor barrier laid tight across a low crawlspace floor beneath plumbing and wiring

Neighborhoods we work in

Daniel Island Park
Codners Ferry
Smythe Park
Center Park
Etiwan Park
River Landing
Beresford Creek
Ralston Creek
Cochran Park

Do not see your street? Call (843) 408-3877 and ask. If your address falls outside our area, we will tell you straight.

Frequently Asked Questions

Daniel Island crawlspaces need precision, not a heavy sell.

Free inspection, moisture readings, labeled photos, and a recommendation limited to what the numbers support.

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