Skip to content
Johns Manville BaseGrip SD/SA SBS Modified Bitumen Base Sheet, 36 in. x 72 ft Roll
Regular price $143.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville BaseGrip SD/SA SBS Modified Bitumen Base Sheet, 36 in. x 72 ft Roll
Johns Manville BaseGrip SD/SA is an SBS-modified base sheet for roofs with two or more plies of modified bitumen, sold as one 36 in. x 72 ft roll. Its sand top surface includes a self-adhering side lap for faster installation, and it accepts a torchable cap sheet, hot asphalt or approved cold adhesive. The SBS rubber and asphalt blend delivers the elasticity to handle roof expansion and contraction.
Key Features:
- SBS modified: An SBS (styrene-butadiene-styrene) synthetic rubber and high quality asphalt blend brings elasticity and flexibility to the sheet.
- Self-adhering lap: The sand top surface has a self-adhering side lap that speeds installation and simplifies use.
- Flexible cap options: Allows installation of a torchable cap sheet, hot asphalt, or an approved cold adhesive, and is ideal with heat welding.
- Lays flat: Elasticity and flexibility let the sheet lay flat, virtually eliminating wrinkles for fast, efficient application.
- Handles movement: Elongation and recovery properties accommodate the continual expansion and contraction strains experienced on all roofs.
- Base ply design: Designed as the base ply in multi-ply modified bitumen systems installed over an approved substrate.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 36 in. x 72 ft |
| Product line | JM BaseGrip SD/SA SBS Base Sheet |
| Available colors | ['Gray'] |
| Available sizes | ['36 in. x 72 ft roll'] |
| Dimensions | 36 in. x 72 ft per roll |
| Material | SBS-modified bitumen base sheet with sand top surface |
| Finish / texture | Sand top surface with self-adhering side lap |
| System type | Multi-ply modified bitumen base ply |
| Application methods | Torchable cap sheet, hot asphalt, approved cold adhesive, heat welding |
| Intended use | Base ply over an approved substrate in two-plus ply modified bitumen roofing |
Coverage & How Much You Need:
One 36 in. x 72 ft roll covers up to 216 sq ft of roof at full width; subtract for side and end laps per the specified installation method to size your order.
Fit and Compatibility:
Intended as the base ply in Johns Manville modified bitumen systems with a compatible cap sheet applied by torch, hot asphalt, cold adhesive or heat welding. Install over an approved substrate and verify the full system assembly with the membrane manufacturer.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of JM BaseGrip SD/SA base sheet measuring 36 in. x 72 ft, gray.
Q: How much does one roll cover?
A: At 36 in. x 72 ft, one roll covers roughly 216 sq ft before lap deductions.
Q: What cap sheets can go over it?
A: The sand top surface accepts a torchable cap sheet, hot asphalt, or an approved cold adhesive, and the product is ideal with heat welding.
Q: Why choose an SBS base sheet?
A: The SBS rubber-asphalt blend adds elasticity and flexibility, so the sheet lays flat and handles expansion and contraction on the roof.
Q: What substrate do I need?
A: It may be used as the base ply when installed over an approved substrate; confirm substrate approval with the system specification.
Q: Is the side lap self-adhering?
A: Yes, the sand top surface includes a self-adhering side lap that aids faster installation.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
BaseGrip SD/SA is a strong pick for multi-ply jobs where a self-adhering side lap saves labor on large fields. Stage rolls and let them relax before adhering to maximize flatness, and always check the substrate is approved for the specified attachment method. Match the cap sheet and adhesive or torch application to the system specification for a warrantable assembly.
Torch application of modified bitumen is a fire hazard; follow fire-safe torching procedures, keep extinguishers on site and comply with local fire codes.
Order JM BaseGrip SD/SA SBS Base Sheet in 36 in. x 72 ft rolls for your next multi-ply modified bitumen roof.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
