Metal roofing Trim

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• What it is: Trim installed at the base of a wall or panel system.
   
• Purpose: Directs water away from the structure and protects the bottom edge of panels.
   
• Common types: Base trim, starter strip, or drip edge.

• What it is: A cap or cover installed on top of parapet walls or roof edges.
   
• Purpose: Prevents water infiltration into the wall system and protects from weathering.
   
• Common types: Snap-on coping, metal cap flashing, and custom-fabricated coping.

 • What it is: A narrow strip of metal installed along the roof edges (eaves and rakes).

• Purpose: Directs water away from the fascia and prevents it from seeping under the roofing material.

• Why it matters: It protects both the roof deck and siding from water damage and helps guide runoff into gutters.

 • What it is: The vertical finishing edge that runs along the roofline where the roof meets the outer walls.

• Purpose: Supports the lower edge of the roof and gutters.

• Looks & protection: Gives a clean edge and protects the wood beneath from weather.

• What it is: Metal pieces installed around roof penetrations (chimneys, vents, skylights) and transitions (walls, dormers).

• Purpose: Seals these vulnerable areas to prevent leaks.

• Common types: Step flashing, counter flashing, and base flashing.

• What it is: The external angle formed where two roof slopes meet. Refer to Ridge Caps below for more info.

• Purpose: A hip cap or hip flashing covers this seam, protecting it from water intrusion.

• Where you see it: On roofs with sloping that meets at a point on all sides, the hips run from the ridge down to the eaves.

• What it is: Metal trim installed along the sloped edges (rakes) of a gable roof.
   
• Purpose: Protects the roof edge from wind and water while giving a finished look.
   
• Common types: Standard rake, gable trim, or custom profiles depending on roof pitch.

 • What it is: The piece that runs along the peak (ridge) of the roof.

• Purpose: Seals the top seam where two sides of the roof meet.

• Bonus feature: On vented systems, ridge caps may also include venting using Z or H metal to allow hot air to escape the attic.

 • What it is: The underside of the eaves (the part you see when looking up from the ground).

• Purpose: Typically vented, soffit allows air to circulate into the attic, reducing moisture and regulating temperature.

• Material: Perforated steel panels made to match steel standing seam roofing systems.

• What it is: A metal trim used on roofing systems to connect or transition between different roof planes or between roof and vertical surfaces (e.g., wall transitions, slope changes).
   
• Purpose: Provides a watertight and visually clean connection where roofing surfaces meet dissimilar materials or angles.
   
• Common types: Custom-fabricated transition trims depending on the slope and material interface.

 • What it is: The internal angle where two roof planes meet.

• Purpose: Valley trim directs rainwater and melting snow off the roof.

• How it’s finished:  Valley trim is typically completed with a W- or V-shaped metal flashing installed beneath the roofing panels. This flashing helps channel water away efficiently and prevents leaks at the joint where roof planes meet. Because each panel must be precisely cut and bent to fit the valley angle, this is often the most labor-intensive part of the installation. Even small mistakes are highly visible and can compromise both appearance and performance. 

• What it is: Shaped steel profiles used in various parts of metal roofing systems for joining, transitioning, and finishing.
   
• Purpose:
   
  • H Metal: Connects two metal panels end-to-end and is also used to mount flashing or trim for siding.
     
  • Z Metal: Installed beneath panels or between layers, especially at ridge caps and hips, to provide water shedding and structural separation.
     
  • J Metal (J Channel): Provides a clean edge and support for soffit panels or siding at the corners of the building.
     
• Common usage: Ridge caps, hips, siding flashings, soffit terminations, and panel transitions.