VaporDefender™ — the whole crawlspace system, one order.
VaporDefender™ is a single-sheet woven vapor barrier — no glued layers, no delamination, no odor. Tell us your crawlspace and we’ll build the exact material list, down to the last screw.
Buying for the job, or the whole territory
Running crawlspace jobs? Contact us for contractor pricing on volume orders. Supply houses can apply to carry the full line.
Do one crawlspace, done right
Size it with the calculator and order exactly what you need at a fair price — no account, no minimum, shipped to your door.
Stop guessing. Know exactly what your job needs.
Enter your floor sections and pillars, and we size floor liner, wall liner, seam tape, butyl tape, term bar, and fasteners — then drop the whole bundle in your cart in one click.
- Wall length auto-derived from your floor perimeter
- Handles multiple rooms and support pillars
- Builds a complete, priced material list
- Add the full system to cart in one click
Everything the crawlspace needs, from one source.
Buy the barrier and the parts that finish the job together — not a roll from here and tape from there.
VaporDefender™ Crawl
Single-sheet woven vapor barrier. No glued layers to separate, no adhesive odor.
View the liner →Wall liner & term bar
Foundation-wall liner sized to your perimeter, with term bar and masonry screws.
View wall system →Seam & butyl tape
Seam tape for the field, double-sided butyl for walls and pillars.
View tapes →VaporDefender™ Slab SOON
A 15-mil poly barrier for under-slab vapor and soil-gas protection. In development.
Get notified →Takeoff calculator
Turn your crawlspace dimensions into an exact, priced material list.
Open calculator →Data & install
Specs, perm data, and installation guidance for spec-driven and DIY jobs.
View specs →Made for crawlspaces, start to finish.
We focus on crawlspaces — the product and the whole buying experience are built around getting your job done right.
Single-sheet woven
No glued layers to delaminate, no adhesive that off-gasses odor over time.
The full system
Liner, wall liner, tapes, term bar, and fasteners — one order, one delivery.
Sized in seconds
The only crawlspace calculator in the category builds your list for you.
Direct, contractor & wholesale
Homeowners order direct, contractors get contractor pricing, and distributors carry the line — whatever fits your job.
Carry a line contractors actually want to install.
A complete crawlspace system with room to grow into below-slab. Get the wholesale price sheet and a stocking proposal.