Kent · England
Broadstairs Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Broadstairs. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. It normally takes a few hours for a handful of frames, longer for a whole house. Parking in a town like Broadstairs is usually straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, 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.
How to prepare
- Keep children and pets away from the work area
- Mention any parking rules near the property
- For indoor joints, keep the area dry beforehand if you can
Get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Related advice
Window mastic for homes and businesses in Broadstairs
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. If you are dealing with leaking joints at the ends of sills and damp patches on the reveal after heavy rain, we can help.
Walls in Broadstairs that face the prevailing wind take the most weather, and that’s usually where the sealant gives up first. It’s worth looking at every frame, not just the one that leaks.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Where
- Broadstairs (CT10, CT9, CT12)
- Region
- Kent
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In Broadstairs, as anywhere, most leaks start as a small gap in a joint, and early is when they’re cheapest and quickest to sort.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why book with us
- 4.9 on Google from 180+ five-star reviews
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- Colour agreed with you before work begins
Read what affects the cost or customer reviews.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Quotes for window mastic in Broadstairs
Your quote is based on your job. We look at:
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- Any mould that needs treating
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
What we need to know
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- Where the job is, and your postcode
- Pictures of the joints, sent by email
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
When it is not the sealant
To be straight with you, there are a few things sealant won’t fix:
- Faulty window hardware
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Window sills
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Composite doors
Do you need window mastic in Broadstairs?
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Look out for these signs:
- Hard, cracked sealant around windows
- Cracked internal joints between frame and plaster
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
In the older streets around Parish Church of St Peter the Apostle, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- The length of the guarantee
- How much experience the applicator has
- What preparation is included
- Whether they seal over old material or remove it
Also near Broadstairs
What else we do in Broadstairs
Window mastic in Broadstairs: local notes
Broadstairs is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. 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.
Schools such as St Joseph's Catholic Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Broadstairs station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Broadstairs is about 16 miles east of Canterbury, in Kent. Homes, rented property, offices and hotels in Broadstairs can book us for window mastic. Every job comes with our one-year guarantee. Our Kent coverage runs to 922 places, and Broadstairs is one of them. We also work in Chelmsford, about 48 miles from Broadstairs.
Every address in CT10, CT9 and CT12 is within our area for window mastic, from the main roads to the quietest streets. Streets in the area include High Street, Union Square and Church Road, all of which we cover. Broadstairs sits on or near the A254 and A255, so getting to you is simple. We also cover the places around Broadstairs: Upton (1 mile south-west), St Peter's (1 mile north-west), Northwood (1 mile south-west), Kingsgate (2 miles north) and Northdown (2 miles north). Further out, we also cover Deal (10 miles south), Herne Bay (13 miles west), Walmer (11 miles south), Whitfield (15 miles south-west), Sandwich (7 miles south-west) and Aylesham (14 miles south-west).
Near you in Broadstairs
Locally, jobs take us to homes and businesses close to The Charles Dickens School, The Charles Dickens School and The Little Albion Inn and the streets around them. Broadstairs has its own railway station: Broadstairs station. Other landmarks nearby include Queen Elizabeth the Queen Mother Hospital (2 miles north-west) and Westwood Cross (1.5 miles west). Not far away are Sandwich and Pegwell Bay.
Landlords, agents and businesses in Broadstairs
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
We work for landlords and agents as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Common questions in Broadstairs
Can you help a landlord with a rental near Broadstairs station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is window mastic in a coastal place like Broadstairs any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Do you work in Broadstairs?
Yes. We work in Broadstairs and the rest of Kent. For a quote, phone 0345 464 0079 or drop us an email.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Can you quote for more than one area?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
How much does window mastic cost in Broadstairs?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Can resealing stop a draught around my window?
In many cases. The gap between frame and wall is a common source of draughts, and sealing the inside and outside joints closes that path.
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.