A frieze board is a horizontal trim board installed where the top of a wall’s siding meets the soffit or cornice, providing a clean, finished transition between these two different surfaces while often also serving as a stopping point for the siding material below.
This trim element addresses a specific transition challenge, since siding needs a defined termination point at the top of the wall, and a frieze board provides both the visual finish and functional edge this transition requires.
Proper flashing behind the frieze board matters just as much as at other siding transitions, ensuring water is directed outward rather than working behind this horizontal trim piece into the wall assembly.
What Does a Frieze Board Involve?
- A horizontal trim board at the top of the wall
- A termination point for siding material below
- Coordination with soffit or cornice above
- Flashing integration preventing water intrusion behind it
Why Is a Frieze Board Important?
By providing a clean, defined stopping point for siding at the top of a wall, a frieze board creates a more finished, intentional appearance than siding simply terminating awkwardly against the soffit without any transitional trim element. This detail contributes meaningfully to a home’s overall exterior polish and architectural coherence.
Because this trim sits at a horizontal transition point where water needs to continue shedding outward, proper flashing behind the frieze board deserves the same careful attention as any other horizontal siding transition, protecting against the hidden water intrusion that inadequate detailing here could otherwise cause. This coordinated approach between trim and flashing produces a more reliably weathertight transition overall.
Frieze Board vs. Rake Board
A frieze board addresses the horizontal transition where siding meets the soffit along an eave. A rake board addresses the sloped transition along a gable end, a different orientation requiring its own specific trim and flashing approach.