The Problems

Laying out drainage on horizontal surfaces presents many issues. Narrow rolls of drainboard require a lot of weighting to keep them from lifting in the wind or rolling back up because of material memory. This means higher labor costs for rolling out small rolls to cover large areas. Weights reduce open work areas, reducing productivity.

Conventional drainboards have been commoditized, driving manufacturers to cost-savings efforts that include using cheaper geotextiles and compromised performance. As a result, incidents of clogging have increased. Additionally, these cheaper geotextiles have less resistance to soil pressure after backfilling, which causes a reduction in drainage space and, therefore, a reduction in drainage rates.

The Solution

DELTA®-TERRAXX PLUS is the ideal solution for horizontal drainage requirements. It offers the ideal combination of compressive strength, drainage performance, handling, and installation ease.

DELTA®-TERRAXX PLUS is the first dimpled drainboard with the special integrated self-adhering edge tab. The sealed edge tab helps prevent the ingress of soil particles and provides dramatically better positional stability. Once in place, DELTA®-TERRAXX PLUS stays in place.

The large, light, and easily cut rolls save labor and make installation much easier than traditional drainage composites. Large spaces are covered faster and with less ballast, leaving wide-open work areas on podium decks and other horizontal applications, allowing for additional efficiencies.

The unique geotextile ensures that DELTA®-TERRAXX PLUS won’t clog. The special manufacturing process means that in situ soil pressures will compromise neither the drainage space around and between the dimples nor the drainage rate.

The DELTA®-TERRAXX PLUS drainage system ensures an ideal water drainage and permanently protects pavements and slab coverings from frost damage.

Product Details
Product Benefits

• Unique self-adhesive flat tab for secure placement and sealing
• Heat-bonded special clog-resistant geotextile
• Large 2 m wide rolls for faster installation
• Lightweight and easily cut
• Optimal combination of compressive strength and drainage capacity
• Compressive strength of 8,969 psf (429 kPa)
• Tested long-term durability
• Maintains drainage space, even after placement of backfill or overburden
• Available in rolls 2 m (6.6’) by 12.5 m (41’)

• Excellent for flat roof decks, PRMA roof systems, green roofs, and walkable paving stone patios
• Lays flat and stays in place due to self-adhering flat tab
• Requires less ballast during installation, allowing for wide-open work areas
• Easy to carry and easy to cut
• Drains reliably without clogging
• No loss of drainage capacity caused by soil pressure, snow, landscaping and plantings, pedestrians, and significant vehicle wheel point loads