East Sussex · England
Northease Window Mastic
Mastic around window and door frames, sills and patio doors in Northease, with a 12-month guarantee on every job. Call for a quick quote.
- A bead that does not match the frame
- Black, perished sealant on frames
- Draughty joints inside around the window
Landlord and commercial work in Northease
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Window mastic in Northease, done properly
Over two decades of sealing frames has taught us which products suit which walls. We are ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. If you are dealing with old mastic that has gone black or come away and rain getting in at the frame or under the sill, we can put it right.
In a village or hamlet like Northease, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
You get a one-year guarantee, the same in Northease as everywhere else we work.
- Where
- Northease (BN7)
- Region
- East Sussex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Northease questions
Can you do window mastic in Northease?
Yes, Northease is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Do you cover smaller places like Northease?
Yes. Northease is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. You will know the timing when we quote.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Northease.
How we quote for window mastic
You’ll get a clear quote before work begins. It’s based on:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How many areas need sealing
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What to tell us for a quote
To make quoting easier, please include:
- A few pictures by email, if you can
- Whether it’s a home or a business
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or drop us an email.
What we are called out for in Northease
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
It’s worth asking for a quote if you see:
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
- Water coming in at the bottom corners of a door
- Cracked sealant at the sill ends
If you look after a building such as Priory School, its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How much experience the applicator has
- Whether the sealant suits the joint
- Are they insured?
- How the colour is chosen
Frames and glazing around Northease
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Monk's House (about 0.7 miles east) are a reminder that the area around Northease has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you live in an older home near St Peter's Church, the joint between an old wall and a newer frame is usually the first place rain gets in. If you let a flat or house near Southease station, renewing tired window mastic between tenants heads off draught and damp complaints.
Northease is about 3 miles south of Lewes, in East Sussex. Every kind of property in Northease can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Northease is one of 289 towns and villages in East Sussex where we work. You can also see our page for Brighton, roughly 6 miles from Northease.
All of BN7 is covered for window mastic, from the main roads to the quietest streets. Close by, we work in Rodmell (1 mile south-east), Iford (1 mile north-west), Kingston near Lewes (2 miles north-west), Southover (2 miles north) and Cliffe (2 miles north). We also work in nearby towns such as Eastbourne (13 miles east), Seaford (6 miles south-east), Hailsham (11 miles east), Uckfield (10 miles north-east), Newhaven (4 miles south-east) and Peacehaven (3 miles south).
What’s near Northease
Typical jobs here are in homes near Lewes and Laughton Levels, among other places. The nearest railway station is Southease station, about 1.4 miles south-east. Other landmarks nearby include Lewes Castle (2.2 miles north) and Lewes Victoria Hospital (2.4 miles north). The countryside around Northease includes Southerham Farm and Itford Hill.
Surface by surface
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. Those are sealed with a product suited to stone or concrete.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Other services in Northease
When it isn’t the sealant
A few problems are outside what sealant work can do:
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Draughts through the window seals rather than the frame
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Joints and surfaces we work on
- Composite doors
- Timber windows & doors
- uPVC windows
- Window sills
- Aluminium frames
- Patio & French doors
How the visit works
At the end, we look at the finished work together and explain the cure time. The work normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. Somewhere like Northease needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
How to get a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
Read more
Looking after it afterwards
So the new joints stay in good condition:
- Don’t use solvent cleaners on the joint
- Clear any debris from frame drain holes
- Ventilate rooms so frames do not stay wet inside
- Do not aim a pressure washer at the joints
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.