In Portsmouth, as everywhere, 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 and we'll tell you what we think has failed.
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
What usually causes it?
Edge seal failure
Every sealed unit has an edge seal and desiccant. Once the seal fails, humid air gets in and the desiccant saturates.
Movement and age
Thermal movement and age wear the seal; units at the bottom of the lantern often go first.
Covering Portsmouth and nearby
Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.
From Southampton to Portsmouth is roughly 15 miles — all part of the Hampshire area we cover.
We also cover nearby Gosport (2 miles), Fareham (5 miles), Ryde (6 miles).
Guide prices for misted glass unit replacement in Portsmouth
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 Portsmouth: questions
Do you cover Portsmouth?
Yes. We cover Portsmouth, including the PO5 postcode area, as part of Hampshire. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
How do I get a price for misted glass unit replacement in Portsmouth?
Send a few photos of the lantern and the problem, with your Portsmouth postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
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.
Will the new pane match the others?
We match tint and coatings as closely as possible; a new unit can look very slightly clearer than older neighbours.
Other lantern repairs in Portsmouth
- Eaves beam and gutter repairs in Portsmouth
- Upstand and kerb repairs in Portsmouth
- Cracked lantern glass replacement in Portsmouth
- Slipped glass panel repairs in Portsmouth
- Aluminium roof lantern repairs in Portsmouth
- Flat rooflight and skylight repairs in Portsmouth
Misted glass unit replacement near Portsmouth
More about misted glass unit replacement · All roof lantern repairs in Portsmouth