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TopShield Pro Greenguard PB6 Roof Cover Board, 3/8 in. x 4 ft x 50 ft
Regular price $88.00Orders start at $399 — combine any items to reach the minimum. Learn more
TopShield Pro Greenguard PB6 Roof Cover Board, 3/8 in. x 4 ft x 50 ft
TopShield Pro Greenguard PB6 Roof Cover is a closed-cell extruded polystyrene (XPS) board with high-impact facers on both sides, supplied as one 3/8 in. x 4 ft x 50 ft board. It can be installed directly over existing coal tar roof systems under the conditions the manufacturer describes, protecting the new roof assembly.
Key Features:
- Closed-cell XPS: The board comprises closed-cell extruded polystyrene (XPS) for durable performance.
- High-impact facers: High-impact facers on both sides protect the roof assembly.
- Coal tar compatible: Can be installed directly over existing coal tar roof systems if the roof has not been re-saturated within the previous 4 years.
- Temperature limited: The new roof system must limit maximum coal tar temperature to 110°F to prevent volatiles from attacking the board.
- Long board format: 4 ft x 50 ft format reduces joints across large roof fields.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | TopShield |
| Sell unit | 1 board, 3/8 in. x 4 ft x 50 ft |
| Product line | TopShield Pro Greenguard PB6 |
| Available sizes | 3/8 in. x 4 ft x 50 ft |
| Material | Closed-cell extruded polystyrene (XPS) with high-impact facers |
| Thickness | 3/8 in. |
| Dimensions | 3/8 in. x 4 ft x 50 ft |
| Length | 50 ft |
| Width | 4 ft |
| Intended use | Roof cover board over existing coal tar roof systems |
Coverage & How Much You Need:
One board measures 4 ft wide by 50 ft long, giving 200 square feet before fit waste. Plan layout with staggered joints and cut boards to fit penetrations and edges.
Fit and Compatibility:
Intended as a roof cover board installed over existing coal tar roof systems, under the manufacturer's conditions: the roof must not have been re-saturated within the previous 4 years, and the new system must limit maximum coal tar temperature to 110°F. Membrane, insulation and adhesives are sold separately.
Frequently Asked Questions (FAQ):
Q: What size is one board?
A: One sell unit is a 3/8 in. thick, 4 ft x 50 ft board.
Q: How much does one board cover?
A: The 4 ft x 50 ft board covers 200 square feet before trimming and waste.
Q: Can it go over coal tar roofs?
A: Yes, directly over existing coal tar systems if the roof has not been re-saturated within the previous 4 years, and the new system limits coal tar temperature to 110°F maximum.
Q: Why the temperature limit?
A: The manufacturer states it prevents volatiles from escaping the existing system and attacking the PB6TS Roofing Cover Board.
Q: What facers does it have?
A: High-impact facers are applied to both sides of the closed-cell XPS core.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Cover boards protect the membrane from traffic and substrate irregularities, and this long 4 ft x 50 ft XPS format covers a lot of area with few joints. Verify the coal tar history and design the system for the 110°F coal tar temperature limit before committing to direct installation. Where the coal tar condition cannot be verified, a separation layer or different cover board should be considered.
Handle long, thin boards carefully in wind, and follow the roof system design and safety data sheets for adhesives used in the assembly.
Order the TopShield Pro Greenguard PB6 Roof Cover board for your coal tar re-cover project.
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