in partnership with
Crawl Space and Basement Waterproofing Products, Now in Philadelphia
Professional-grade vapor barriers, sump pumps, dehumidifiers, and drainage for homeowners and contractors across the Northeast. Pick up in Philadelphia or ship to your door.
Philadelphia pickup
Most orders ship within 24 hours
Specialist response within 24 hours
Contractor accounts available
One Northeast source for waterproofing supplies
Danbro has long supplied foundation contractors across the Northeast. Walder Foundation Products does the same for crawl space and basement waterproofing, with locations across Virginia and North Carolina. Together, we’re bringing Walder’s product line to Pennsylvania, New Jersey, Delaware, and New York, stocked and ready in Philadelphia.
How can we help?
Homeowners
Wet basement or musty crawl space? Start with the right products, or talk to a specialist about what your space needs.
DIYers
Buy the same vapor barriers, pumps, and dehumidifiers the pros use. Pick up in Philadelphia or have it shipped.
Contractors
Dedicated account manager, tiered contractor pricing, NET terms, and free training.
Shop Walder products
Top sellers from Walder’s catalog. Click through for full specs, options, and ordering on Walder’s site.
Vapor Barriers
The foundation of every crawl space encapsulation. Woven, reinforced liners that stop ground moisture.
ProSeal Liner 16 Mil Woven Vapor Barrier, 12′ x 100′
1,200 sq ft of woven vapor barrier. Won’t grow mold. 25-year warranty.
ProSeal Liner 12 Mil Woven Vapor Barrier, 12′ x 100′
1,200 sq ft. The go-to liner for standard crawl space encapsulation.
20 Mil Hybrid String/Woven Vapor Barrier, 12′ x 100′
The heavy-duty option. 1,200 sq ft with a lifetime warranty.
Sump Pumps and Basins
Move water out before it becomes a problem.
Glentronics 1/3 HP Cast Iron Sump Pump
Commercial-grade cast iron. Moves 3,200 gallons per hour at 10 ft while drawing only 5 amps. 3-year warranty.
WFP Telescopic Sump Basin with Lid, 16 Gallon
Telescopes from 11″ to 18″ to fit tight crawl spaces. Gas-tight lid. Made in USA.
Zoeller M53 1/3 HP Cast Iron Sump Pump
Cast iron 1/3 HP pump from one of the most recognized names in sump pumps.
Dehumidifiers
Control humidity once the space is sealed. AprilAire units sized for crawl spaces and basements.
AprilAire E70 Dehumidifier
Covers up to 2,200 sq ft. The crawl space standard.
AprilAire E100 Dehumidifier
Covers up to 3,200 sq ft. Built for basements and larger spaces.
AprilAire E70 Wi-Fi Dehumidifier
The E70 with Wi-Fi. Monitor and control humidity from your phone. 5-year warranty.
Drainage
Get water to the pump before it does damage.
Pro-Flow Geo Mat, 8′ x 50′
400 sq ft dimpled drainage mat for wet crawl spaces and basements. Made in USA.
WFP 4″ x 100′ Perforated Drain Tile with Filter Sock
The French drain staple.
Pro-Flow Strip Drain, 12″ x 150′
Subsurface drainage for narrow trenches.
Crawl Space Doors and Vents
Close up the crawl space with covers and doors that seal and last.
Flex Foam Vent Cover, Pack of 12
Precut 8″ x 16″ flexible covers. Seal vents from the inside, no foam board cutting.
WFP Recessed Vent Cover, 8″ x 16″
Exterior cover for standard 8″ x 16″ vent openings.
WFP Crawl Space Access Door, 16″ x 32″ Black
One-piece door and frame. UV-stabilized plastic that won’t rust, rot, or fade.
Looking for something else? Shop all Walder products
Built for waterproofing contractors
Walder works with crawl space and basement contractors every day. Open an account and get the support that goes with it.
Dedicated account manager
Tiered contractor pricing on every order
NET payment terms available through a credit application
Free training at Walder’s Ashland, VA facility or on your jobsite, plus Crawl Space Con, a free two-day event each spring
Talk to a Walder specialist
Tell us about your project. A Walder specialist will contact you within 24 hours.
Your information is shared with Walder Foundation Products so they can respond to your request.
Common questions
In Philadelphia, PA. Walder also has pickup locations in Ashland and Chesapeake, VA, and Garner and Charlotte, NC. Most online orders ship within 24 hours.
Orders are placed with and fulfilled by Walder Foundation Products. Danbro is Walder’s Philadelphia partner.
Walder supplies products, not installation.
Yes. Contractor accounts include tiered pricing, a dedicated account manager, and the option to apply for NET terms.
Walder offers free contractor training at their Ashland, VA facility or on your jobsite, plus Crawl Space Con, a free two-day event each spring.
Not sure where to start?
Tell us about your space. A Walder specialist will get back to you within 24 hours.
