Smart VentRetrofit.
Continuous low-level eaves vent and high-level ridge vent retrofit — addresses black mould in cold-roof lofts.
From £260
Price
Full day · 2 roofers
Duration
10-year on vents
Warranty
London-wide
Coverage
— Overview
What this job actually involves.
If your loft has black mould across most of the rafters, point ventilation (a single tile vent) isn't enough — you need continuous airflow. We retrofit a continuous eaves ventilator strip along the front and rear, plus a continuous ridge ventilator at the apex. Air enters low, warms in the loft and exits high — passive cross-flow, no mechanical fan, no electricity.
— Signs you need this
Five things we look for first.
Black mould covering most of the loft rafters
Condensation drips visible across the loft
Insulation damp in multiple spots
Existing tile vents not solving the problem
Recent loft conversion sealing off original eaves vents
— Included in the price
A fixed price means a fixed scope.
No hidden extras. Materials, access, disposal and a written guarantee are all in the headline number.
- Continuous eaves ventilator strip (front and rear)
- Continuous ridge ventilator at the apex
- Existing insulation moved back at eaves where blocked
- Loft inspection before and after
- Mould-affected areas treated with fungicidal wash (optional)
- 10-year manufacturer warranty on ventilator products
— On the day
How we work, step by step.
Eaves preparation
Lowest course of tiles lifted along both eaves. Existing insulation rolled back from the wall plate where it's blocking the original eaves gap.
Fit eaves vent
Continuous over-fascia ventilator strip fitted along the full length. Tiles re-bedded over the top.
Ridge vent
Ridge tiles lifted along the full apex. Continuous ridge ventilator unit clipped on, ridge tiles re-bedded over it.
Verify airflow
Inside the loft, you should feel a slight draught from front eaves to ridge. That's your cross-flow established.
— Materials & kit
What we bring to the van.
The unglamorous detail that decides whether a fix lasts five years or twenty-five. We use trade-grade or manufacturer-spec materials only — never builders' merchant own-brand.
- Klober continuous over-fascia vent
- Klober continuous ridge vent
- Insulation rolls if eaves need re-stuffing
- Optional fungicidal wash for mould
— Why book with EG Roofing
The from £260 you see is the from £260 you pay.
Eight advantages built into every fixed-price small job — the things our customers tell us actually matter.
Fixed price, no surprises
Quoted before we arrive. Materials, access and disposal are all in the headline number.
Booked by the half-day
Most jobs slotted within 5–7 working days. Same-week for active leaks.
10-year on vents
Written workmanship guarantee on every job, lodged to your email after sign-off.
Before & after photos
WhatsApp photo sign-off before payment — you see the fix even if you're at work.
12+ years on London roofs
Same two-roofer crews — never sub-contracted. Public liability cover £2m.
4.9★ on Google & Checkatrade
Hundreds of reviews from SW19, CR0, BR1, SE and Central London commercial.
Clean site, zero debris
Drives and borders sheeted, all waste taken away in our van — no skip required.
One direct point of contact
WhatsApp the same roofer who quoted you — no call-centre, no chasing.
— Flexible payment
Spread the cost. Interest-free.
Pay how it suits you. Split this from £260 job into 3 interest-free instalments with Klarna or Clearpay, settle in 30 days, or pay by card, bank transfer or cash on completion. Your choice — we don't add a surcharge.
3 interest-free payments — first today, then every 30 days. Soft credit check, instant decision.
e.g. £260 → 3 × £87
4 fortnightly payments — pay over 6 weeks, no interest, no fees if paid on time.
e.g. £260 → 4 × £65
Card on completion
Tap, chip + PIN or contactless via Stripe terminal. Visa, Mastercard, Amex. Receipt by email.
Bank transfer or cash
Faster Payments on the day, or cash on completion. VAT receipt issued for landlords and small businesses.
Klarna and Clearpay are FCA-regulated payment providers. 18+, UK residents, subject to status. Missed payments may affect your ability to use these services. Full T&Cs at klarna.com and clearpay.co.uk.
— Frequently asked
3 answers before you book.
Mechanical fan or passive vent?
Passive every time unless you've got a flat-ceiling loft conversion. Passive uses no electricity, has no moving parts and lasts 30+ years.
Will it cure existing mould?
It'll stop it spreading. Existing mould should be wiped down with a fungicidal wash once airflow is established — we include that on request.
Is this needed after a loft conversion?
Almost always — conversions seal the original eaves gap. A continuous vent retrofit at the new eaves line is the standard fix.
— Free quote in 5 steps
Book your smart vent retrofit.
Five quick taps and it lands straight in our WhatsApp — same crew who'd do the job. From £260 · Full day · 2 roofers.
— Free quote · 5 quick steps
Book smart vent retrofit
Book it.Sorted this week.
From £260 · Full day · 2 roofers · 10-year on vents. Klarna & Clearpay accepted.
— Often booked together
Related small jobs.
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Insulated, draught-sealed loft hatch fitted — cuts the cold spot above the landing and stops condensation drips.
From £140 · 2 hours · 1 roofer
Soffit & Fascia Cap-Over
Rotten timber fascia capped in UPVC with continuous over-fascia vent — keeps the eaves dry and the loft breathing.
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