East Sussex · England
Boreham Street Window Mastic
Window and door frames in Boreham Street need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Draughts coming in around windows and doors
- Gaps left after new windows were fitted
- Old mastic that has gone black or come away
Window mastic for homes and businesses in Boreham Street
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on timber windows & doors, uPVC windows and patio & French doors, and common reasons people get in touch are draughts coming in around windows and doors and mastic that has split away from the wall.
Outdoor sealant needs dry, clean surfaces, so work on frames around Boreham Street is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Big or small, you get the same 12-month guarantee in Boreham Street and across East Sussex.
- Location
- Boreham Street (BN27)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
The work is quick compared with the damage it prevents: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. Older cottages and farmhouses around Boreham Street can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
Why Boreham Street customers choose us
- Rated 4.9 stars on Google
- Sealant colour chosen to suit
- Homes, businesses and hotels
- More than 20 years in sealant work
What we’re called out for in Boreham Street
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
If you can see any of these, it’s time to have the joints looked at:
- Black, perished sealant on frames
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- Gaps between the frame and the inside reveal
For landlords with property near Normans Bay station, renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- When the joint can take water or movement
- Whether VAT is included
- How the joint is cleaned and prepared
- What happens if the job turns out different
Nearby places to Boreham Street
Other services in Boreham Street
Looking after it afterwards
After the cure time, these simple habits help:
- Avoid harsh chemicals near the mastic
- Clear any debris from frame drain holes
- Keep timber frames painted
- Wipe condensation off the frames
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
FAQs for Boreham Street
Do you cover smaller places like Boreham Street?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Normans Bay station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Boreham Street, along with the rest of our area.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How much does window mastic cost in Boreham Street?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
What affects the cost of window mastic
You will get a clear quote before work begins. It’s based on:
- The old material and how stubborn it is
- Any mould that needs treating
- How many rooms, windows or areas are involved
- Any working-time requirements on site
Combining jobs into one visit is normally more efficient than separate visits. We’ll give you a clear quote for the lot.
Asking for a quote
What to tell us when you ask for a quote:
- The type of property
- Where the job is, and your postcode
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
Landlord and commercial work in Boreham Street
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
We also work for property managers and facilities teams in Boreham Street and across East Sussex. We can quote a run of properties together.
The process
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of frames, longer for a whole house. Somewhere like Boreham Street 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 go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Frames and glazing around Boreham Street
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Boreham Street, as everywhere, window mastic is only as good as the preparation behind it.
Boreham Street is about 5 miles north-west of Bexhill-on-Sea, in East Sussex. Whether you’re in the middle of Boreham Street or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 289 places across East Sussex, from the larger towns to small villages. Our Brighton page covers work nearby (22 miles or so).
Our applicators cover all of the BN27 postcode area for window mastic and the streets around it. You’ll find streets such as Boreham Lane, Wood Lane and Boreham Hill, all of which we cover. We also cover Windmill Hill (1 mile north-west), Wartling (1 mile south-west), Flowers Green (2 miles west), Chapel Row (2 miles west) and Golden Cross (2 miles west). Within a short drive, we also cover Eastbourne (7 miles south-west), Hastings (9 miles east), Bexhill-on-Sea (5 miles south-east), Seaford (13 miles south-west), Hailsham (5 miles west) and Crowborough (15 miles north-west).
Landmarks near Boreham Street
We work in homes and buildings around The Bulls Head Inn, among other places. The nearest railway station is Normans Bay station, roughly 3.7 miles south of the centre. Well-known places in the area include Amberstone Hospital (4 miles west) and Herstmonceux Castle (1.3 miles south-west). Green spaces nearby include Gillham Wood.
When it is not the sealant
It helps to know what we cannot do:
- Rotten timber, which needs a joiner first
- Damp coming through the wall itself rather than the frame joint
- Broken hinges, locks or handles
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Composite doors
- Window sills
- uPVC windows