What is the difference between flat and hollow soffit?

Flat soffit is thinner and has no internal ribs, so it needs backing timber or a short span behind it. Hollow soffit has ribs and bridges an open eaves gap on its own. Most capping jobs use flat; most full replacement jobs use hollow.

Is the board Agate Grey on both sides?

No. The foil is applied to a white board, so the face is Agate Grey and the reverse is white. On a normal roofline that never shows, but it matters on an open porch soffit or a freestanding canopy where both sides are visible.

How long will Agate Grey take to arrive?

Agate Grey is a special foil rather than a stock colour, so branches usually bring it in. Allow 3 to 10 working days.

Flat soffit, sometimes called utility or general purpose board, is the thinner of the two soffit types. It has no internal ribs, so it needs something solid behind it — existing timber, a short span, or a boarded overhang — rather than bridging an open gap on its own.

That makes it the board of choice on a capping job where the original timber soffit is staying, and on any run where the overhang is supported. Five widths from 100mm to 400mm, all 5m lengths.

A note on lead time. Agate Grey is a special foil rather than a stock colour, so most branches bring it in rather than holding it on the shelf. Allow 3–10 working days. Order the whole elevation together and it all lands at once — it is piecemeal ordering that causes the wait.

Key Features

✔ 100mm, 150mm, 200mm, 300mm and 400mm widths
✔ 5m lengths
✔ Needs backing timber or a short span
✔ Agate Grey woodgrain foil on a white board
✔ Colour-matched to Eurocell Agate Grey fascia and trims