Fascias
The board the soffit meets at the eaves, almost always renewed with it.
Fascia services Soffits
Soffit board installation & replacement
The soffit is the board under the roof overhang, the one you look up at from below the eaves. It seals the underside of the roof edge and, when ventilated, lets your roof space breathe. We install and replace ventilated and solid soffits that keep the roof dry and the finish neat.
If the fascia is the board you notice, the soffit is the one you forget. It sits underneath, out of sight, closing the gap beneath the overhanging roof and letting the roof space breathe. Get it wrong and you invite condensation, damp timber and uninvited visitors into the loft.
Below is what a soffit is, why ventilation matters, how to spot a failing board, and your choices when it is time to renew, work nearly always handled alongside fascias and guttering.
The basics
What is a soffit board?
A soffit is the horizontal board closing the underside of your roof overhang, between the wall top and the bottom of the fascia. Stand under the eaves and look up: that board is the soffit. It hides the rafter feet and keeps rain and wildlife out of the gap.
It has a second job, too: airflow. The soffit is the natural place to let fresh air into the roof void, so a cracked, sagging or blocked board stops doing both jobs at once.
Why it matters most
Why does a roof space need ventilation?
This is the part most people never think about, and the part that does the most good when it is right.
Ordinary life makes a lot of moisture: cooking, washing, drying clothes, even breathing. That warm, damp air rises into the roof space, and with nowhere to go it condenses on the cold underside of the roof, soaking insulation, staining ceilings and, in time, rotting the timbers.
Ventilated soffits give the void a way to breathe: air is drawn in at the eaves and escapes higher up, carrying the moisture with it. When we renew soffits, we check how your roof breathes now and keep that airflow rather than sealing it off.
A quick note: ventilation needs vary from roof to roof. We assess what yours requires rather than applying a single rule.
Spot the signs
Signs your soffits need replacing
Soffits sit overhead and out of mind, so trouble often goes unnoticed. Here is what to look for.
Cracks and splits
They let damp in and give insects and birds a route into the roof.
Sagging or bowing boards
A board dropping or bellying down has taken on moisture or lost support.
Damp staining or mould
Dark patches point to trapped moisture or poor airflow above.
Pests getting in
Wasps, birds and squirrels at the gaps mean the edge is no longer sealed.
Flaking paint on timber
Peeling paint on older timber shows the surface has stopped protecting it.
Condensation in the loft
Damp insulation or droplets on the timbers can mean blocked vents.
Your options
Ventilated or solid soffits?
Soffits come in a couple of forms, and the choice turns on how your roof is already set up to breathe.
The difference between ventilated and solid
A ventilated soffit has a built-in airflow path, a perforated board or a continuous vent strip, that draws air into the roof on its own. A solid soffit is a plain, unvented board, fine where the roof breathes elsewhere and still ventable later with circular push-in vents. We check how your roof is ventilated now before recommending either.
Hollow or flat boards
Flat boards are a smooth sheet across the overhang; hollow, box-profile boards have a tongue-and-groove look and suit deeper eaves. Both do the same job, so it comes down to eaves depth and the finish you prefer.
Fitting soffits with the fascias
The soffit and fascia meet at the eaves and share access, so they are usually renewed together, often as part of a full roofline replacement, with one colour and profile across the roof edge and nothing disturbed later.
Look & finish
Soffit colours and finishes
Modern soffits are almost always uPVC: light, weatherproof and maintenance-free, ideal for a board that is awkward to reach and easy to forget. They coordinate with matching fascias so the whole roof edge reads as one, and follow the same colour palette as the rest of the roofline, so you can keep it consistent or pick a deliberate contrast.
- White uPVC, the classic, bright underside finish.
- Anthracite grey & black to match contemporary fascias and windows.
- Woodgrain foils for a warmer, timber-style finish under the eaves.
Planning your budget
What affects the cost of new soffits?
Rather than a number that cannot fit your roof, here is what makes the difference.
- Length and depth of the overhang: longer, deeper eaves mean more board.
- Access and height: upper storeys may call for scaffolding.
- Ventilation needed: the method to keep your roof breathing affects materials.
- Board type and finish: flat, hollow, colours or woodgrain vary from white.
- Condition behind the boards: damp or decayed timber may need making good.
- Combining with fascia and gutter work: doing the edge together shares access.
A written quotation after our assessment sets it all out, so there are no surprises once work starts.
Good to know
Soffit FAQs
A ventilated soffit has a built-in airflow path, a perforated board or a vent strip, that lets air into the roof. A solid soffit is plain and unvented, but can still be ventilated with circular push-in vents. The right choice depends on how your roof is already ventilated.
Cracks and splits, sagging or bowing boards, flaking paint on timber, damp staining, and birds, wasps or squirrels getting into the roof edge. A soffit that has dropped or is crumbling is no longer sealing the roof space.
Yes. When renewing soffits we can improve the roof-space ventilation at the same time, either by fitting ventilated boards or by adding vents to solid ones. We assess how your roof breathes and recommend an approach that suits it.
Not always, but very often. The soffit and fascia meet at the eaves and share the same access, so renewing them together gives a consistent finish and avoids disturbing new work later. We will advise honestly if only one needs attention.
Keep exploring
Related services
Guttering
Sits above the soffit on the fascia line, completing the roof edge.
Guttering servicesRoofline replacement
Soffits, fascias and rainwater goods renewed together in one package.
Complete replacementLearn how we work on our installation process page, or compare the materials & finishes.
Cracked or sagging soffits overhead?
Tell us what you can see beneath your eaves and we will arrange a no-obligation assessment and a clear written quotation.