A New Roof is incomplete without trim

• What it is: The external angle formed where two roof slopes meet.

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

• Where you see it: On roofs with a hip design (sloping on all four sides), the hips run from the ridge down to the eaves.

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

• Purpose: Valleys direct rainwater and melting snow off the roof.

• How it’s finished: A valley flashing (often W- or V-shaped metal) is installed underneath to ensure water flows properly and doesn’t leak through.

 • 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 to allow hot air to escape the attic.

 • 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 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: Often made from aluminum, vinyl, or perforated metal panels in roofing systems.

 • 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: Thin 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.