CSSB Trade Show & AGM 2026
October
14-15, 2026
Chicago, IL
Certigroove vs. Certi-Cut Shingles for Sidewalls
Press Release |
October 7, 2026
When selecting certified cedar shingles for sidewall applications, the surface profile and edge preparation matter as much as the grade. At the Cedar Shake & Shingle Bureau, we have guided contractors and specifiers through these decisions for over a century, and the comparison between Certigroove and Certi-Cut shingles for sidewalls comes up consistently among trade professionals working to match material performance with design intent. Both carry our Certi-label certification standards, but they serve different applications. Specifying the wrong profile creates problems that no amount of quality installation can fully correct.
What Defines Each Profile
Certigroove Shingles
Certigroove shingles feature a grooved face that creates a series of parallel channels running with the grain. For sidewall use, this profile delivers:
- A textured surface that breaks up flat light and adds visual depth to large wall planes
- Improved drainage performance, with grooves directing water away from the field
- A shadow line effect that complements both traditional and contemporary architectural profiles
- Strong compatibility with medium and wide exposures typical of sidewall applications
The grooved face is a functional attribute, not a cosmetic one; it interacts with weather exposure in ways a smooth-face shingle does not.
Certi-Cut Shingles
Certi-Cut shingles are precision edge-trimmed to exact width tolerances, producing consistent butt and taper dimensions across every piece. For sidewall work, that consistency translates directly into:
- Uniform coursing with predictable lap geometry
- Tighter fitting at joints, reducing the risk of infiltration at butt edges
- Easier layout on irregular or multi-story wall sections where course alignment is critical
- A cleaner finished appearance where the installation demands tight, even lines
The precision cut is a dimensional guarantee, not a sorting process. It reflects a different priority: dimensional control over surface character.
Exposure, Coursing, and Application Context
Sidewall applications differ from roofing in one fundamental way: weather exposure patterns are largely lateral rather than top-down, and visual inspection is constant and close-range. That changes how each profile performs and how it should be specified.
Certigroove performs best where the design intent calls for texture and shadow depth, where the substrate and exposure support a wider weather exposure, or where the specification calls for a traditional hand-split aesthetic in a machine-certified product.
Certi-Cut performs best where coursing precision is the primary installation requirement, where the wall area involves returns, corners, or terminations requiring tight dimensional control, or where the specification calls for a clean, modern profile with consistent reveal lines.
These are not interchangeable decisions. Specifying Certigroove on a project that demands dimensional precision in coursing creates layout headaches. Specifying Certi-Cut where surface texture is the design driver leaves the finished wall looking flat.
Find out how long a cedar roof lasts.
Grade Selection Within Each Profile
Both Certigroove and Certi-Cut shingles are available within our established Certi-label grading framework. For sidewall applications, grade selection should account for three factors.
- Exposure-to-length ratio: Sidewall exposures typically run wider than roofing exposures, which places more of each shingle in the weather zone and raises the importance of clear, knot-free material in the exposed portion.
- Heartwood content: Our top grades specify all-heartwood or heartwood-dominant material, which is the appropriate baseline for any exterior sidewall application where long-term durability is the standard.
- Butt thickness: Consistent butt thickness across a run of shingles is more critical on sidewalls than on roofing because coursing irregularities read directly to the eye at standing distance. Specifiers who reach for a lower grade to reduce material cost on sidewalls typically encounter those savings again in labour adjustments and callbacks.
Making the Right Call
The Certigroove versus Certi-Cut decision for sidewalls comes down to what the project is optimizing for: surface character or dimensional consistency. Both profiles meet our certification standards, and both perform reliably under properly installed, ventilated sidewall conditions. The specification error is treating them as equivalent options when the application requirements are not equivalent.
At the Cedar Shake & Shingle Bureau, technical guidance is grounded in more than a century of practical application. If you’re working through a sidewall specification and need to confirm the right profile for your project conditions, reach out through our contact form. We’ll connect you with the technical resources your project requires.
When selecting certified cedar shingles for sidewall applications, the surface profile and edge preparation matter as much as the grade. At the Cedar Shake & Shingle Bureau, we have guided contractors and specifiers through these decisions for over a century, and the comparison between Certigroove and Certi-Cut shingles for sidewalls comes up consistently among trade professionals working to match material performance with design intent. Both carry our Certi-label certification standards, but they serve different applications. Specifying the wrong profile creates problems that no amount of quality installation can fully correct.
What Defines Each Profile
Certigroove Shingles
Certigroove shingles feature a grooved face that creates a series of parallel channels running with the grain. For sidewall use, this profile delivers:
- A textured surface that breaks up flat light and adds visual depth to large wall planes
- Improved drainage performance, with grooves directing water away from the field
- A shadow line effect that complements both traditional and contemporary architectural profiles
- Strong compatibility with medium and wide exposures typical of sidewall applications
The grooved face is a functional attribute, not a cosmetic one; it interacts with weather exposure in ways a smooth-face shingle does not.
Certi-Cut Shingles
Certi-Cut shingles are precision edge-trimmed to exact width tolerances, producing consistent butt and taper dimensions across every piece. For sidewall work, that consistency translates directly into:
- Uniform coursing with predictable lap geometry
- Tighter fitting at joints, reducing the risk of infiltration at butt edges
- Easier layout on irregular or multi-story wall sections where course alignment is critical
- A cleaner finished appearance where the installation demands tight, even lines
The precision cut is a dimensional guarantee, not a sorting process. It reflects a different priority: dimensional control over surface character.
Exposure, Coursing, and Application Context
Sidewall applications differ from roofing in one fundamental way: weather exposure patterns are largely lateral rather than top-down, and visual inspection is constant and close-range. That changes how each profile performs and how it should be specified.
Certigroove performs best where the design intent calls for texture and shadow depth, where the substrate and exposure support a wider weather exposure, or where the specification calls for a traditional hand-split aesthetic in a machine-certified product.
Certi-Cut performs best where coursing precision is the primary installation requirement, where the wall area involves returns, corners, or terminations requiring tight dimensional control, or where the specification calls for a clean, modern profile with consistent reveal lines.
These are not interchangeable decisions. Specifying Certigroove on a project that demands dimensional precision in coursing creates layout headaches. Specifying Certi-Cut where surface texture is the design driver leaves the finished wall looking flat.
Find out how long a cedar roof lasts.
Grade Selection Within Each Profile
Both Certigroove and Certi-Cut shingles are available within our established Certi-label grading framework. For sidewall applications, grade selection should account for three factors.
- Exposure-to-length ratio: Sidewall exposures typically run wider than roofing exposures, which places more of each shingle in the weather zone and raises the importance of clear, knot-free material in the exposed portion.
- Heartwood content: Our top grades specify all-heartwood or heartwood-dominant material, which is the appropriate baseline for any exterior sidewall application where long-term durability is the standard.
- Butt thickness: Consistent butt thickness across a run of shingles is more critical on sidewalls than on roofing because coursing irregularities read directly to the eye at standing distance. Specifiers who reach for a lower grade to reduce material cost on sidewalls typically encounter those savings again in labour adjustments and callbacks.
Making the Right Call
The Certigroove versus Certi-Cut decision for sidewalls comes down to what the project is optimizing for: surface character or dimensional consistency. Both profiles meet our certification standards, and both perform reliably under properly installed, ventilated sidewall conditions. The specification error is treating them as equivalent options when the application requirements are not equivalent.
At the Cedar Shake & Shingle Bureau, technical guidance is grounded in more than a century of practical application. If you’re working through a sidewall specification and need to confirm the right profile for your project conditions, reach out through our contact form. We’ll connect you with the technical resources your project requires.
