Damp Proofing of Nudura ICF
A self-adhesive waterproofing membrane designed to protect below-grade ICF walls from ground moisture.
Waterproofing Membrane
We recommend the use of Nudura “Peel and Stick” damp proof membrane to protect ICF from ground moisture. The membrane is a self-adhesive waterproofing product composed of SBS modified bitumen with a tri-laminated woven polyethylene facer. A silicone release film protects the adhesive side until installation, and the membrane is applied directly to the ICF surface.
The Nudura Peel & Stick membrane is manufactured for Nudura and printed with the Nudura logo.
Summer grade
Application temperature: 10°C to 50°C (50°F to 122°F).
Winter grade
Application temperature: -10°C to 40°C (14°F to 104°F).
Surface Preparation
Ensure the surface is smooth, clean, dry and free from dust or debris. Clean, dry and even surfaces normally do not require priming for dampproofing. If the EPS has been exposed to sunlight for an extended period, remove the yellow dust coating before application.
Installation
1Prepare and prime
If required, apply compatible water-based primer and allow it to dry completely. Install the membrane the same day.
2Apply vertically
Remove the release film and install vertically with a minimum 3 in (76 mm) side overlap.
3Seal and roll
Use a compatible sealant at the top edge and footing transition, then apply even pressure with a membrane roller.
4Protect before backfill
Use self-compacting granular fill and install protection board wherever backfill could damage the membrane.
Where horizontal installation is necessary, provide a minimum 6 in (152 mm) overlap. For the top 12 in of the foundation wall, install 1/4 in Hardiboard mechanically fastened to the ICF webs at 16 in on centre using corrosion-resistant round-head screws.
Membrane Properties
| Property | Standard | Result |
|---|---|---|
| Thickness | — | 40 mil (1.0 mm) |
| Roll dimensions | — | 75 ft × 36 in (22.9 m × 0.91 m) |
| Gross / net coverage | — | 225 ft² / 206 ft² (20.8 m² / 19.1 m²) |
| Roll weight | — | 44 lb (20 kg) |
| Tensile strength, MD/XD | ASTM D5147 | 64 / 88 lb/in (11.3 / 15.4 kN/m) |
| Ultimate elongation, MD/XD | ASTM D5147 | 52 / 24% |
| Cold-temperature flexibility | ASTM D5147 | -30°C (-22°F) |
| Static puncture | ASTM D5602 | 90 lb (400 N) |
| Tear resistance, MD/XD | ASTM D1876 | 85 / 90 lb (375 / 400 N) |
| Lap adhesion | ASTM D1876 | 11.4 lb/in (2000 N/m) |
| Peel resistance | ASTM D903 | 17.5 lb/in (3050 N/m) |
| Water absorption | ASTM D5147 | <0.1% |
| Water vapour permeance | ASTM E96, Procedure B | <0.016 perm (<0.90 ng/Pa·s·m²) |
| Termite resistance | Trinity/ERD Report S10030SC.04.08 | Pass |
Values are nominal. Confirm current product data and local building-code requirements before installation.
Code Compliance
The report by Halsall Engineering (now WSP Group) provides the opinion that the Nudura Dampproofing Membrane meets the intent of the 2006 Ontario Building Code and, by inference, the current BC Building Code.
- The self-adhering polymer-modified bitumen is compatible with EPS-based ICFs when solvent-based primers are not used.
- Its water vapour transmission is well below 1.0 g/m²/day and adequately resists below-grade water vapour.
- The membrane layers provide resistance to soil gas comparable to or better than materials already approved by the OBC.