If the room under your lantern overheats in summer or glares, the glass is usually the problem, not the frame. Send photos from Penzance (TR18) and we'll tell you which it is — with the price agreed in writing before any work.
What you might be seeing
- The room is noticeably hotter than the rest of the house in summer
- Furniture or flooring fading under the lantern
- Clear, uncoated glass in an older lantern
Common causes we find
Orientation
South- and west-facing lanterns gain the most heat in the afternoon.
No ventilation
A lantern without opening vents traps warm air at ceiling level.
About Penzance and the TR18 area
Wind-driven rain is the real test of a roof lantern, and the wetter west sees plenty of it. Leaks that appear only in a storm from one direction usually point to the cappings or eaves on that face — a useful clue when you send us photos.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
From Truro to Penzance is roughly 24 miles — all part of the Cornwall area we cover.
Close by, we also cover Camborne (12 miles), Redruth (16 miles), Falmouth (21 miles).
Guide prices for solar control and self-cleaning glass upgrades in Penzance
Guide price for solar control and self-cleaning glass upgrades: £345–£895 ex VAT (£414–£1,074 inc 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?
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?
- 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.
Solar control and self-cleaning glass upgrades in Penzance: questions
Do you cover Penzance?
Yes. We cover Penzance, including the TR18 postcode area, as part of Cornwall. 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.
Which places near Penzance do you cover?
As well as Penzance, we cover nearby Camborne, Redruth, Falmouth, Truro and the rest of Cornwall.
How much does it cost to upgrade lantern glass?
Usually £345–£895 ex VAT per unit depending on size and specification, confirmed in writing before work starts.
Can you add a film instead?
Films are cheaper but can affect the unit's warranty and may not suit sloped double glazing. We'd rather replace the unit properly.
Other lantern repairs in Penzance
- Eaves beam and gutter repairs in Penzance
- Flat roof junction and flashing repairs in Penzance
- Slipped glass panel repairs in Penzance
- uPVC roof lantern repairs in Penzance
- Leak investigation and inspection in Penzance
- Commercial roof lantern repairs in Penzance
Solar control and self-cleaning glass upgrades near Penzance
More about solar control and self-cleaning glass upgrades · All roof lantern repairs in Penzance