If a roof lantern pane looks cloudy or wet between the two layers of glass, the sealed unit has failed and moisture has got inside. Send photos from Gerrards Cross (SL9) and we'll tell you which it is — with the price agreed in writing before any work.
What you might be seeing
- One pane looks hazier than the others
- Misting that comes and goes with the weather
- Water marks or tide lines inside the unit
Why it happens
Edge seal failure
Every sealed unit has an edge seal and desiccant. Once the seal fails, humid air gets in and the desiccant saturates.
Water sitting on the edge
If the unit's edge sits in water because the eaves don't drain, the seal fails sooner.
About Gerrards Cross and the SL9 area
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 Gerrards Cross as part of Buckinghamshire, about 19 miles from Aylesbury.
Neighbouring places we cover include Chalfont St Peter (2 miles), Uxbridge (4 miles), Rickmansworth (5 miles).
How much should it cost?
Typical range: £245–£595 ex VAT, which is £294–£714 with VAT, per glass unit. 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?
In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. 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?
- Send photosWhatsApp or upload a few photos and tell us when it leaks.
- Guide priceWe reply with a guide price and whether a visit is needed.
- Fixed price in writingYou approve the price and the date before anything starts.
- Repair and testWe fix what's failed, water-test where it matters, and send photos.
Misted glass unit replacement in Gerrards Cross: questions
How do I get a price for misted glass unit replacement in Gerrards Cross?
Send a few photos of the lantern and the problem, with your Gerrards Cross 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 Gerrards Cross do you cover?
As well as Gerrards Cross, we cover nearby Chalfont St Peter, Uxbridge, Rickmansworth, Slough and the rest of Buckinghamshire.
How much does a misted lantern unit cost to replace?
Usually £245–£595 ex VAT per unit depending on size, glass spec and access, confirmed in writing before work starts.
How long does a replacement unit take?
Units are made to measure, so there's a lead time between measuring and fitting. Fitting itself is usually a short visit.
Other lantern repairs in Gerrards Cross
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Misted glass unit replacement near Gerrards Cross
More about misted glass unit replacement · All roof lantern repairs in Gerrards Cross