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D6164 – Standard Test Method Technical Guide
📐 Classification and Types
This specification covers prefabricated SBS modified bituminous sheet materials with polyester reinforcement. Sheets are classified by type and grade. Type I and Type II denote performance categories, while Grades G and S indicate surfacing.
| 🟦 Type | 📏 Grade | 📐 Surfacing |
|---|---|---|
| Type I | G | Granule surfaced |
| Type I | S | Smooth surfaced |
| Type II | G | Granule surfaced |
| Type II | S | Smooth surfaced |
✅ Type I and Type II provide different performance levels, with Grade G offering granule surfacing for weather protection.
The standard intends for these materials to form multiple ply roofing and waterproofing membranes, emphasizing minimum properties.
🏭 Material and Manufacture
Manufacturing involves saturating polyester reinforcement with asphalt or modified asphalt and coating it with SBS-modified bitumen. Mineral stabilizers are allowed. For Grade G, granules are applied on the weather side, with fine material on the reverse and selvage to prevent sticking. The SBS-modified coating ensures flexibility and durability.
⚠️ Note: Glass yarns may be added in small percentages for processing, but they do not contribute significantly to physical properties, so products remain classified under D6164.
The sheet material is suitable for heat welding application, with surfacing that does not interfere with adhesion.
📊 Testing and Compliance
Testing according to D5147/D5147M establishes minimum property values such as tensile strength and elongation. The specification references D1079 for terminology, ensuring consistency in definitions across the industry.
| 🟦 Test Parameter | 📏 Reference | 🎯 Criteria |
|---|---|---|
| Physical properties | D5147/D5147M | Minimum values per type and grade |
| Reinforcement identification | D6164 scope | Polyester primary reinforcement |
💡 For in-place performance criteria, refer to design standards beyond this material specification.
Design criteria like fire resistance and uplift are beyond this scope, focusing solely on material properties.
❓ Frequently Asked Questions
🔍 What is the primary reinforcement specified in D6164?
The primary reinforcement is polyester fabric, though glass yarns may be included in minor amounts without altering classification.
💡 How are the grades distinguished?
Grade G has granule surfacing on the weather side, while Grade S has smooth surfacing.
⚡ What is the scope of this specification?
It covers material specifications for SBS modified bituminous sheets with polyester reinforcement, not installation or design criteria.
📌 Which testing standards are referenced?
D5147/D5147M for testing methods and D1079 for terminology.