Why state the mil thickness of the vapor barrier?

Because it's the main thing separating your bid from a cheaper one, and it's invisible in a finished crawlspace. A 6-mil barrier and a 20-mil reinforced liner are different products with different lifespans — printing yours is the fairest way to explain a higher price.

Should the dehumidifier be optional?

Quote it as part of the system, not as an add-on. Sealing a crawlspace without moisture control creates the exact humidity problem your warranty will be blamed for — and if the customer declines it, that decision belongs in writing.

How do I write the as-found repair line?

As a per-unit rate — per joist, per pier, per square foot of rot — noted as billed only after photo approval. It prices the unknown honestly without pretending you can see through a vapor barrier you haven't lifted yet.

Crawlspace Encapsulation Estimate Template (Free)

Essential line items on a crawlspace encapsulation estimate

A professional crawlspace encapsulation estimate protects your business margins, establishes clear building code compliance, and educates homeowners on the difference between cheap 6-mil plastic and reinforced heavy-gauge vapor barrier systems:

Specialty Contractor Licensing Header: Business name, logo, physical address, phone, email, state waterproofing contractor license number, and commercial general liability insurance details.
Customer & Crawlspace Access Metadata: Client name, property address, crawlspace square footage, perimeter wall linear footage, access hatch dimensions, and headroom clearance.
Debris Cleanup & Mold Remediation: Debris removal, old fiberglass insulation removal, and EPA-registered mold/fungal antimicrobial spray treatment.
Heavy-Gauge Vapor Barrier Specification: Square footage and mil thickness of reinforced antimicrobial polyethylene liner (12-mil, 15-mil, or 20-mil virgin poly) covering floor and wall surfaces.
Wall Liners, Termination Bars & Seam Taping: Wall liner height, aluminum termination bars with mason fasteners, double-sided butyl tape, and heavy-duty seam tape.
Drainage & Dehumidification System: Perforated French drain trenching, sump pit basin, dual-check sump pump, and energy-star commercial crawlspace dehumidifier (70–100 pints/day).
As-Found Structural Repair Unit Rates: Per-joist sistering rates, pier shimming charges, and subfloor repair unit costs.
Draw Schedule, Warranty & Exclusions: 30/40/30 progress payment schedule, system warranty duration (10–25 years), and written exclusions.

Free Crawlspace Encapsulation Text Template

Copy and paste the template below to build professional crawlspace and waterproofing estimates:

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               CRAWLSPACE ENCAPSULATION & WATERPROOFING ESTIMATE
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CONTRACTOR INFO:                           ESTIMATE & SITE DETAILS:
[Your Crawlspace Business Name]            Estimate Number: CEE-2026-0921
[Waterproofing License / Insurance #]      Date: August 3, 2026
[Phone & Billing Email Address]            Estimate Validity: 30 Days

CLIENT & PROPERTY LOCATION:                CRAWLSPACE METADATA:
Client Name: [Homeowner Name]              Area: 1,400 Sq Ft Floor | 160 Lf Wall
Property: [951 Moisture Lane]              Headroom: 32 Inches | Standing Water: Yes

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LINE ITEM DESCRIPTION & MATERIAL SPECIFICATIONS                AMOUNT
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1. Crawlspace Debris, Trash & Damaged Insulation Removal        $650.00
2. Organic Mold & Fungal Remediation (1,400 sq ft @ $1.25/sq ft) $1,750.00
3. 20-Mil Reinforced Antimicrobial Vapor Barrier (1,400 sq ft) $3,500.00
   - Spec: Floor & Wall Coverage, Seams Taped w/ Waterproof Tape
4. Aluminum Termination Bar Wall Fastening (160 lf @ $4.50/lf)  $720.00
5. Closed-Cell Spray Foam Rim Joist Insulation (160 lf)         $960.00
6. Interior Perimeter French Drain Trenching & Pipe (120 lf)   $2,880.00
7. Heavy Sump Pit Basin & 1/3 HP Submersible Pump Unit          $850.00
8. 70-Pint Commercial Crawlspace Dehumidifier w/ Pump Drain    $1,650.00
9. Foundation Vent Sealing & Air-Tight Hatch Door Cover        $350.00

AS-FOUND STRUCTURAL REPAIRS (Billed upon photo approval):
- Floor Joist Sistering: $160 per joist
- Subfloor Rot Replacement: $18 per sq ft
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SUBTOTAL ESTIMATE:                                             $13,310.00
State & Local Material Sales Tax:                              $215.00
--------------------------------------------------------------------------------
TOTAL ESTIMATED PROJECT COST:                                  $13,525.00
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PROGRESS PAYMENT DRAW SCHEDULE:
- Draw 1 (30% Material & Booking Deposit at Signing):           $4,057.50
- Draw 2 (40% Draw Upon Vapor Barrier & Drainage Completion):   $5,410.00
- Draw 3 (30% Final Balance Upon Dehumidifier Activation):      $4,057.50

SYSTEM WARRANTY: 20-Year Limited Warranty on 20-Mil Reinforced Liner System.
Dehumidifier covered per 5-Year Manufacturer Warranty.
================================================================================

Vapor barrier mil thickness specs: The key to winning high-margin bids

Printing exact mil thickness specifications distinguishes your bid from cheap 6-mil hardware store plastic:

Encapsulation Cost Benchmarks ($3.00–$8.00 per sq ft total system): Includes debris removal, mold treatment, wall/floor liners, drainage, and dehumidification.
6-Mil Hardware Plastic (DO NOT USE): Non-reinforced black or clear construction plastic degrades, tears during foot traffic, and off-gasses petroleum odors.
12-Mil to 20-Mil Reinforced Liners ($1.50–$3.20 per sq ft material/install): Multi-ply virgin polyethylene cord-reinforced liners resist tears, puncture, and mold growth. Specifying “20-mil cord-reinforced antimicrobial liner” reframes your price as an investment.

Sump pumps, perimeter French drains, and commercial dehumidifiers

Sealing a crawlspace without managing water intrusion creates severe moisture issues:

Perimeter French Drain Trenching ($24–$45 per linear foot): Trenching along interior foundation footings, laying 4” perforated pipe in gravel, and channeling water to a sump pit.
Submersible Sump Pump Systems ($750–$1,400 installed): Heavy-duty 1/3 HP or 1/2 HP cast-iron submersible sump pumps with battery backup surge protection.
Commercial Dehumidifiers ($1,200–$2,200 installed): Sealed crawlspaces require dedicated low-temperature commercial dehumidifiers (70–100 pints per day) with automatic condensate pumps.

Progress draw schedules and photo-documented structural repairs

30/40/30 Payment Structure: Collect 30% upon signing to order liners and dehumidifiers, 40% when drainage and liners are fastened, and 30% upon final testing.
Photographic Inspection Logs: Take high-resolution photos of rot, joists, and standing water before covering them with white liners to document as-found structural repairs.

If you also offer basement waterproofing, see our free basement waterproofing estimate template or check out our review of the crawlspace and waterproofing invoicing app.

Software with your per-square-foot and per-linear-foot rates saved builds this estimate from the inspection photos and schedules the deposit and mid-job draw automatically.