We carry out condensation diagnosis and fixes in Boston and across the PE21 area. Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens.

What you might be seeing
- Water on the inside of the glass on cold mornings, even without rain
- Drips after cooking, showers or drying clothes
- Wet window sills elsewhere in the house too
Common causes we find
High humidity
Cooking, kettles, showers, drying washing and people all add moisture to the air.
Poor ventilation
Without trickle vents, extraction or an opening vent, moist air has nowhere to go.
About Boston and the PE21 area
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
Boston is around 27 miles from Lincoln, and both are within our Lincolnshire coverage.
Close by, we also cover Spalding (14 miles), Skegness (19 miles), Wisbech (23 miles).
How much should it cost?
Typical range: £145–£495 ex VAT, which is £174–£594 with VAT, per visit. 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?
Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. 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.
Condensation diagnosis and fixes in Boston: questions
How do I get a price for condensation diagnosis and fixes in Boston?
Send a few photos of the lantern and the problem, with your Boston 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 Boston do you cover?
As well as Boston, we cover nearby Spalding, Skegness, Wisbech, King's Lynn and the rest of Lincolnshire.
Will new glass stop condensation?
Better glass raises the inner surface temperature and helps, but if the room is very humid, ventilation matters more. We'll tell you which will make the bigger difference.
Is condensation in a lantern normal?
Occasional light condensation on very cold mornings can be. Regular dripping isn't, and can damage linings and cause mould.
Other lantern repairs in Boston
- Roof lantern resealing in Boston
- Glazing bar and capping repairs in Boston
- Ridge and hip repairs in Boston
- Misted glass unit replacement in Boston
- Leak investigation and inspection in Boston
- Commercial roof lantern repairs in Boston
Condensation diagnosis and fixes near Boston
More about condensation diagnosis and fixes · All roof lantern repairs in Boston