Seal out ground moisture for good. 20-mil reinforced vapor barrier, taped seams, wall & pier wrap, sealed vents, and a dedicated dehumidifier — installed in one to three days for most Charlotte homes.
A licensed local crew — usually out in 24 to 72 hours. Written scope, fixed price, no pressure.
The first Concord encapsulation I ever quoted was a 1908 house on Union St two blocks from the courthouse. The owner had inherited it, the family had rented it as a long-term for thirty years, and she was three weeks into converting it to a race-weekend Airbnb when her handyman refused to go back under the house. When I dropped in I understood why. Twenty-inch clearance at the perimeter, hand-hewn 2-by-10 joists still holding but running dark with old moisture staining, four courses of unmortared brick per pier, and a pile of 1970s foil-faced fiberglass batts sitting on the dirt like a rug that had been rolled up and forgotten. No ground cover of any kind. The RH under there was 91 percent in early June and the crawl smelled like a wet Boy Scout tent that had been packed away damp.
She wanted to know if we could encapsulate it for race season. I said yes but not the way a Christenbury tract home gets encapsulated. Downtown Concord pre-World War Two brick pier construction plays by different rules than a 2003 subdivision off Poplar Tent Rd, and the encapsulation plan has to match the house. On a Union St or Cabarrus Ave house from the 1900s or 1910s, the perimeter is not a continuous wall. It is a colander of dry-laid stone and unmortared brick with 40-year-old mortar patch attempts filling the gaps. You cannot terminate a wall liner against that the way you do against a 2003 poured block wall in Cox Mill. You do it differently. And you accept that the humidity load is going to be higher until the dehumidifier catches it, which means you size up.
The suburban belt is a completely different animal. Christenbury off Poplar Tent, Moss Creek on the north side, Cox Mill in the school-district-driven growth belt near Cox Mill High School — these are textbook block-perimeter 30 to 48 inch crawls with builder-grade 6-mil polyethylene torn to shreds, foil-faced fiberglass batts halfway out of the joist bays, and undersized 8-by-16 vents punched every 8 feet. That job is bread and butter. Two to three days on site, wrap the piers, mechanical termination bar, closed-cell vent seals, drop a Santa Fe Compact 70 or Aprilaire E070, done. It looks the same across all three HOAs with minor variation.
What follows is what I actually do under Concord crawls, why the downtown pre-war stock needs a completely different plan than the subdivisions, and how race-week rental economics changes the timeline for anyone renting a downtown house on Coca-Cola 600 or ROVAL 400 weekends. Free on-site inspection anywhere in Concord, Harrisburg, Kannapolis, and out to Huntersville across the county line.
On a downtown Concord house from the pre-World War Two era, the encapsulation process starts with two hours under the crawl before I write a scope. I probe every original brick pier stack for movement and every shim stack for rot. On a 1900s Union St or Cabarrus Ave house it is normal to find two or three piers that have settled a half-inch to an inch and a half, with a girder above bearing on 1970s cedar shims that come apart when you touch them with a screwdriver. That is shore-and-repair before the liner ever comes into the picture — Grip-Tite adjustable steel post, new 12-inch-depth concrete footing on undisturbed soil, Cabarrus County building permit and inspection. Cabarrus inspectors will fail a footing that was poured on fill or that shortcut the depth requirement. We photograph the pit before the pour and send it to the inspector so the inspection is a formality.
Then the perimeter. Downtown houses in this era have unmortared brick or dry-laid stone perimeter walls between the piers, sometimes with a 1950s attempt at enclosure using loose brick and a skim of mortar. You cannot run a wall liner up that and terminate it the way you would on a Christenbury poured block wall. What we do instead is find the intact courses — usually there are two or three continuous ones you can work with — and terminate the liner mechanically with 1-inch by 1/8-inch aluminum bar bedded in SikaFlex-1a into whatever holds. Then we accept the wall behind the liner is going to see moisture and we size the dehumidifier accordingly. On the 1919 Union St house we did last month we ran an Aprilaire E070 on a 1,650 SF footprint and it held 52 percent RH through July.
Subdivision jobs off Poplar Tent Rd and Kannapolis Pkwy run a completely different playbook. Christenbury, Moss Creek, Cox Mill, and Robinson Church have block-perimeter foundations with 30 to 48 inch clearance and the encapsulation is the textbook process. Tear the fiberglass, seal the vents with closed-cell foam blocks and mechanical covers, put down 20-mil Americover or YellowGuard or Viper CS with 12-inch overlaps, wrap each pier individually with Polyken 337 seam tape, terminate the walls with mechanical bar bedded in SikaFlex-1a, and drop a dehumidifier sized to the cubic footage. A 2,400 SF Christenbury crawl usually takes a Santa Fe Compact 70. A 2,900 SF Cox Mill build with active water history gets an Aprilaire E100 or AlorAir Sentinel HDi90. Two-person crew, three working days, no permits required for the encapsulation itself. The electrical circuit for the dehumidifier is a Cabarrus County electrical permit and we pull it.
Race week changes the timeline for downtown rental owners. If your Union St or Cabarrus Ave short-term rental has a musty first-floor smell three days before a Coca-Cola 600 weekend, you need the ground cover swapped, vents sealed, and a dehumidifier running before Friday check-in. That is a two-day job if the structure is sound and there is no active water source. If the crawl has structural issues — settled piers, rotted sill plate, standing water from a mis-routed downspout — the sequence takes longer and we have to be honest about what fits in the window. The dehumidifier alone will kill the smell within a week if the underlying structure is sound. We have a whole subsegment of the business now that is downtown Concord rental owners trying to solve a review problem before Friday.
Materials on a Concord encapsulation are the same core spec we run across the metro with area-specific sizing adjustments. 20-mil reinforced polyethylene — Americover woven poly, YellowGuard, or Viper CS depending on supplier availability. Never 12-mil, never 10-mil, and we tear out the builder 6-mil on nearly every subdivision job. Seams overlap 12 inches with Polyken 337 or Nashua 357 double-sided PSA seam tape, top-taped for redundancy. Individual pier wraps, not skirted — every job we tear out and redo has skirted piers where the previous contractor cut the corner. Mechanical termination bar is 1-inch by 1/8-inch aluminum stock fastened with 2-1/4-inch masonry screws every 12 inches, bedded in SikaFlex-1a polyurethane sealant. On downtown pre-war Concord houses with rubble-fill perimeter walls, we terminate into whatever intact brick courses we can find and accept the wall behind the liner is going to see moisture — which drives dehumidifier sizing.
Dehumidifiers get spec'd by cubic footage and moisture load, not by whatever the sales catalog defaults to. A tight 1,500 to 1,800 SF downtown Concord house runs an Aprilaire E070 or Santa Fe Compact 70. A 2,000 to 2,500 SF Christenbury or Moss Creek build runs the same E070 or Compact 70. A 2,900 SF Cox Mill build or any downtown house with rubble-fill perimeter takes an Aprilaire E100 or AlorAir Sentinel HDi90. Humidistat holds at 55 percent RH. Drain to daylight where the exterior grade allows, condensate pump when it does not. Dedicated 20-amp circuit — that is a Cabarrus County electrical permit and we pull it. Vents get closed-cell foam blocks on the inside and mechanically fastened covers on the outside. Crawl door gets swapped for an insulated gasketed hatch, no exceptions.
Rim joist insulation on subdivision jobs is usually 3 inches of open-cell spray foam — Icynene or equivalent — installed after we clean out the old fiberglass. On downtown pre-war houses with irregular hand-hewn joists, Rockwool ComfortBatt R-15 mineral wool is the fallback if the homeowner wants no foam or the historic district review favors reversible install methods.
Yes — Concord is a regular encapsulation route. Free on-site inspection anywhere in Concord, fixed written quote before we touch anything.
Concord encapsulation splits into two completely different jobs — downtown pre-war brick pier houses with rubble-fill perimeters that need mechanical termination bar bedded in whatever intact courses exist plus oversized dehumidification, versus 1990s-2010s Christenbury / Moss Creek / Cox Mill block-perimeter tract homes where the scope is textbook wrap-terminate-dehumidify. Cabarrus County structural permitting is stricter on pier footing depth than Mecklenburg, and race-week short-term rentals downtown compress the timeline in ways Charlotte does not see.
28025, 28027. All Cabarrus County addresses covered.
Completely different job. The downtown house has an unmortared brick pier foundation with a rubble-fill or dry-laid stone perimeter between the piers, 20 to 28 inches of clearance, hand-hewn joists, and often two or three settled piers that need shoring and new footings before we can touch the liner. Perimeter termination is mechanical into whatever intact brick courses we can find, and the dehumidifier is sized up because the wall behind the liner is going to see moisture. The Christenbury build is textbook — block perimeter, 30 to 48 inch clearance, tear the fiberglass, seal the vents, wrap the piers, terminate the walls, drop a Santa Fe Compact 70. Same materials, completely different sequence and timeline.
Yes on the ground cover, vents, and dehumidifier. That is a two-day scope if the structure is sound. What we cannot compress into a race-week window is structural repair — settled piers, girder shoring, new footings requiring Cabarrus County permit and inspection all add days that we do not control. If your crawl has structural issues contributing to the moisture problem, we have to sequence that first. But the dehumidifier alone will kill a musty first-floor smell within a week, so if the timing forces a phased approach we start with what moves the needle before check-in and finish the rest after the guests leave.
Not the encapsulation itself. Vapor barrier, sealed vents, and the dehumidifier as an appliance are not permitted trades in North Carolina — same as Mecklenburg. What adds time is any structural repair (new pier footings, sistering, girder replacement) and the dedicated dehumidifier electrical circuit. Cabarrus County building permits are handled through the county building inspections office in downtown Concord and inspector turnaround is typically two to five business days. Electrical is similar. We schedule around it and we know the office.
Very similar with minor variation. Christenbury, Moss Creek, Cox Mill, and Robinson Church are all 1990s-through-2010s block-perimeter construction with 30 to 48 inch clearance, builder-grade 6-mil torn to shreds, foil-faced fiberglass falling out of the joist bays, and no dehumidifier. Cox Mill has the most consistent 42-inch clearance across the footprint. Christenbury tends to have taller crawls because the lots have some grade. Scope is the same across all three — tear the fiberglass, seal the vents, wrap the piers, terminate the walls, size the dehumidifier to cubic footage. Two to three days on site with a two-person crew.
Free on-site Concord inspection. Fixed written quote. Call (980) 227-1769 or book below.