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Hertfordshire · SG1

Flat roof junction and flashing repairs in Stevenage

Dealing with a leak where the roof meets the lantern in Stevenage (SG1)? We re-make the membrane, trims and flashing where the flat roof meets the lantern kerb, with a fixed price agreed in writing first.

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In Stevenage, as everywhere, the junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos and we'll tell you what we think has failed.

Newly trimmed flat roof junction and flashing tape around a roof lantern kerb

Signs you need flat roof junction and flashing repairs

  • Leak near the lantern but not from the frame
  • Missing or loose edge trims and flashings
  • Ponding on the roof next to the lantern

Common causes we find

Cracked GRP

Fibreglass roofs can crack at the kerb corner where movement concentrates.

Missing trims

Without a trim or flashing to protect the top edge, water gets in behind the membrane.

Covering Stevenage and nearby

Leaf fall from garden trees is the most common cause of eaves overflow on suburban extensions. If your lantern sits near trees, clearing the eaves channel each autumn prevents a lot of drips.

We cover Stevenage as part of Hertfordshire, about 12 miles from St Albans.

Close by, we also cover Hitchin (5 miles), Letchworth Garden City (5 miles), Welwyn Garden City (7 miles).

Guide prices for flat roof junction and flashing repairs in Stevenage

Guide price, per lantern£245–£695 ex VAT£294–£834 inc VAT

Typical range: £245–£695 ex VAT, which is £294–£834 with VAT, per lantern. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.

Do you need permission in England?

Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.

How does it work?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Flat roof junction and flashing repairs in Stevenage: questions

How do I get a price for flat roof junction and flashing repairs in Stevenage?

Send a few photos of the lantern and the problem, with your Stevenage postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.

Which places near Stevenage do you cover?

As well as Stevenage, we cover nearby Hitchin, Letchworth Garden City, Welwyn Garden City, Harpenden and the rest of Hertfordshire.

What does a junction repair cost?

Usually £245–£695 ex VAT, confirmed in writing before work starts.

Can you repair a GRP roof without it showing?

Repairs are colour-matched as closely as possible, but new topcoat next to weathered topcoat can look slightly different at first.

Other lantern repairs in Stevenage

Flat roof junction and flashing repairs near Stevenage

More about flat roof junction and flashing repairs · All roof lantern repairs in Stevenage

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