GCP and CertainTeed are pushing 6Sides+ as a single-source building envelope system backed by Saint-Gobain — bundling waterproofing, air barriers, roofing, fireproofing, and electrochromic glass under one coordinated warranty. Here's what that means for specification workflows and risk transfer on commercial projects.
A Single-Warranty Envelope Play Hits the Spec Sheet
In mid-September, Saint-Gobain's North American commercial building brands turned up the volume on 6Sides+, the integrated building envelope system jointly developed by GCP and CertainTeed. The pitch to architects and general contractors is deceptively simple: stop stitching together six independent scopes with six independent warranties, and instead specify one coordinated system that carries a single warranty across every interface — including the tie-ins where envelope failures typically originate.
Building envelope performance depends on every interface working together, which is why GCP and CertainTeed created 6Sides+, a fully integrated building envelope system backed by the expertise and resources of Saint-Gobain. From below-grade waterproofing and air barriers to roofing and critical PLUS elements such as fireproofing, thermal and acoustic controls, and electrochromic glass, 6Sides+ brings proven solutions together into one coordinated approach.
That electrochromic glass mention is the piece worth watching for the fenestration crowd. It signals that dynamic glazing is now being marketed inside a broader envelope bundle rather than as a standalone spec.
What's Actually in the Bundle
The system is broader than the original 2023 launch, which was primarily a waterproofing play. GCP's 6Sides+ system is an integrated, single-manufacturer waterproofing and air barrier portfolio that provides continuous protection from below-grade foundations through vertical walls, all under one warranty. The current iteration expands well beyond that base:
- Below-grade waterproofing (pre-applied and post-applied)
- Air and weather-resistive barriers
- Roofing assemblies (asphaltic and liquid-applied)
- Fireproofing
- Thermal and acoustic insulation
- Gypsum sheathing and interior systems
- Electrochromic glass facades
The Saint-Gobain integrated portfolio goes beyond the building envelope with fireproofing, acoustical insulation, electrochromic glass facades, gypsum sheathing, insulation, ceilings, solar and more.
The Tie-In Problem — and Why Warranties Are the Real Story
Ask any building envelope consultant where commercial projects fail, and the answer is almost never the field of the wall or the middle of the roof. It's the transitions. A lot of warranties don't include the tie-in detail where, say, a horizontal meets a vertical plane. They'll include the horizontal and the vertical, but really where's the problem going to occur? At the tie-in. Saint-Gobain is helping solve for that.
That's the commercial argument behind 6Sides+. On any given job, while you can purchase components from different manufacturers, no individual manufacturer will warrant these product interfaces leaving you vulnerable at critical tie-ins. 6Sides+ covers both GCP and CertainTeed products and their tie-ins with clear and comprehensive warranties.
For owners and their consultants, that shifts a meaningful chunk of risk transfer. Instead of chasing three subs and four manufacturers when moisture shows up at a slab-to-wall transition, there's one throat to choke.
Practical Implications for Specifiers and GCs
For architects: Bundled envelope specifications compress decision cycles, but they also lock projects into a single manufacturer's product family. That's a trade-off worth flagging early in DD — particularly on projects where a competing curtain wall or dynamic glazing system may already be preferred. The inclusion of electrochromic glass in the 6Sides+ orbit puts SageGlass (Saint-Gobain's dynamic glass brand) in a stronger competitive position against View and Halio for projects specifying single-source envelope warranties.
For building envelope consultants: Expect more RFIs about compatibility carve-outs. If a project team wants to spec a non-Saint-Gobain window wall or a third-party air barrier at a specific detail, the warranty math changes. Consultants will need to document which tie-ins remain covered and which revert to the individual manufacturer's standard warranty.
For general contractors: Single-source envelope systems can simplify submittals and reduce coordination between trades, but they also concentrate schedule risk. If one product line hits a lead-time snag, the whole envelope scope slips. GCs bidding institutional and healthcare work — where 6Sides+ has already been referenced on projects like a Seattle medical tower and a public health laboratory — should be asking about product availability by region before committing to the bundle.
For competing manufacturers: The message is clear. Saint-Gobain is using its portfolio breadth as a moat. Standalone air barrier, waterproofing, and glazing manufacturers will increasingly need to publish tested, warranted tie-in details with adjacent products — or partner with roofing and waterproofing OEMs — to stay on shortlists for large commercial projects.
The Bigger Picture
The 6Sides+ push reflects a broader shift in how commercial envelopes are being specified. As energy codes tighten and continuous-insulation requirements expand, the industry is moving away from component-level thinking toward assembly-level performance. Warranty consolidation is the commercial expression of that engineering trend — and Saint-Gobain, with the deepest envelope portfolio in North America, is positioned to define what the bundled spec sheet looks like.