300mm uPVC Vented Soffit Board x 5m
A 300mm vented soffit board closes off the underside of your roof overhang and lets air into the roof space through built-in slots, giving a continuous 10mm air gap. That stops condensation forming on the rafters. It comes in 5m lengths, needs no painting, and wipes clean. These are Eurocell boards. This width comes in 8 colours, so pick your finish and add it to your basket.
What a 300mm vented soffit board is used for
A 300mm vented soffit board suits wider overhangs on houses and bungalows. Use vented soffit on a cold roof, where the loft is insulated at ceiling level and the roof space needs airflow at the eaves.
How to measure for 300mm vented soffit
Measure from the back of the fascia to the wall, at a few points along the run, and take the widest reading. If you're between sizes, take the wider board.
300mm vented soffit board colours and prices

White
£37.99 inc VAT

Anthracite Grey
£54.99 inc VAT

Rosewood
£54.99 inc VAT

Agate Grey
£54.99 inc VAT

Golden Oak
£54.99 inc VAT

Irish Oak
£54.99 inc VAT

Black Ash
£54.99 inc VAT

Chartwell Green
£54.99 inc VAT
300mm vented soffit board questions
Do I need vented soffit?
Use vented soffit on a cold roof, where the roof space needs air at the eaves to stop condensation. If ventilation is already handled another way, such as over-fascia vents, flat soffit is fine.
How much ventilation does it give?
The built-in slots give a continuous 10mm air gap along the length of the board.
How quickly can I get it?
White is usually with you in a few working days. Woodgrain and grey foils can take longer, because some are made to order by the branch. Delivery is £9.99, or free on orders over £150, and you can collect from a local depot instead.
Related boards and fittings
Same width, other boards: 300mm full replacement fascia board · 300mm capping board · 300mm flat soffit board · 300mm hollow soffit board
Browse the full range: Eurocell full replacement fascia boards · Eurocell capping boards · Eurocell flat soffit boards · Eurocell hollow soffit boards
To finish the job: 25mm soffit starter trim (J trim) · 40mm soffit joint (H trim) · polytop fixing pins



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