What is a flat soffit board used for?

Flat soffit boards are used to close off the underside of roof overhangs, porches and boxed soffit areas, creating a straight, uniform finish between the fascia and the wall.

Which width should I choose for a soffit board?

Choose the width based on the soffit projection from the wall to the back of the fascia. Smaller widths are typically used for narrow eaves and porches, while wider boards are used for deeper boxed soffits. Measure the projection and allow for trims and joints.

Does the Eurocell Black Ash flat soffit board need painting or treatment?

No. The Black Ash board is uPVC with a factory-applied foil finish, so it does not require painting, sealing or regular treatment. Cleaning with mild soapy water is normally sufficient.

Is the Black Ash finish colour-matched to Eurocell fascia and trims?

Yes. The Black Ash grained finish is designed to match Eurocell Black Ash fascia boards, trims and accessories for a consistent roofline appearance.

Can flat soffit boards be used with soffit ventilation?

Yes. Flat soffit boards are commonly used with separate soffit vents or over-fascia ventilation systems where airflow is required. Vent requirements vary by roof type, so match the ventilation method to the roof specification.

The Eurocell Black Ash Flat Soffit Board is a rigid uPVC board designed to close off roof overhangs, porch canopies, and boxed soffit areas where a straight, uniform finish is required. Finished in a Black Ash grained foil, it provides the appearance of painted timber without the ongoing maintenance.

The embossed woodgrain surface is colour-stable and designed to match Eurocell Black Ash fascia boards and trims, allowing a consistent roofline finish across the elevation. Unlike timber, the board will not rot, warp, crack, or require painting, making it suitable for both new installations and refurbishment work.

Available in a full range of widths, Black Ash flat soffit boards are commonly used on larger boxed soffits as well as smaller porch details. The board cuts cleanly, fixes easily, and maintains a straight line once installed, making it a reliable choice for professional roofline work.

Foiled Black Ash boards are backed by a 10-year manufacturer guarantee.

Key Features

✔ Black Ash grained foil finish for timber-effect appearance
✔ Flat uPVC profile for clean, straight soffit lines
✔ Fully colour-matched to Eurocell Black Ash fascia and trims
✔ Suitable for porches, extensions, and boxed soffit details
✔ Low-maintenance uPVC — no painting, sealing, or treatment
✔ Cuts and fixes cleanly for accurate installation
✔ 10-year manufacturer guarantee on foiled boards

Typical Installation Use

Flat soffit boards are fitted between the fascia and the wall to close off the underside of the roof overhang. Once soffit battens are set level, each board is cut to width, fixed in position, and jointed to create a continuous soffit line. The flat profile is ideal where a neat, modern finish is required and works particularly well on contemporary properties using darker fascia systems such as Black Ash.