Kent · England
Window & door mastic in Coombe, Kent
Window mastic across Coombe and nearby, with old sealant always removed completely and a 12-month guarantee.
- A bead that does not match the frame
- Cracked sealant at the sill ends
- Mastic that has split away from the wall
How we handle window mastic in Coombe
There are two joints on most windows. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. If you are dealing with rushed sealant from a window installation and sealant in the wrong colour for the frame, we can put it right, on composite doors, uPVC windows and timber windows & doors alike.
In a village or hamlet like Coombe, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
All our work comes with our one-year guarantee, wherever you are in Kent.
- Where
- Coombe (CT3, CT13)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Use gentle cleaners on frames and sealant
- Do not aim a pressure washer at the joints
- Air rooms to keep condensation down around windows
- Keep drainage slots and sill grooves clear
Most silicone sealants won’t take paint, so mention any painting plans before we start. We can use a paintable sealant where that matters.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Nearby places to Coombe
Also in Coombe
Honest limits
In fairness, there are a few things sealant will not fix:
- A failed sealed unit that has misted up
- A door that needs adjusting, rehanging or new seals
- Penetrating damp from a failed cavity tray or render
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Coombe
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Composite doors
- Patio & French doors
- Window sills
Different surfaces, different methods
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We will tell you which suits your home.
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
Why deal with it now?
Resealing frames is a short job: it takes a morning for a couple of windows and a door. Leave it until water is coming in and you may need plastering and decorating as well. Around Coombe, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why choose Mr Mastic in Coombe
- Rated 4.9 stars on Google
- A sealant colour to suit the surroundings
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
Read our cost guide or our reviews.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Window mastic in Coombe: local notes
With historic houses such as Goodnestone Park (about 3.5 miles south-west) nearby, there’s older building stock in the area around Coombe as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Ash Cartwright and Kelsey Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Sandwich station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For an older house near a landmark such as Church of St Nicholas, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Coombe is about 6 miles north-west of Deal, in Kent. Every kind of property in Coombe can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Coombe is one of 922 places in Kent where we work for window mastic. Our Chelmsford page covers work nearby, about 47 miles away.
We work across CT3 and CT13 for window mastic. If you need window mastic at a property on Coombe Lane, Saunders Lane and Langdon Avenue or anywhere close by, our applicators can take on the job. Nearby, we also carry out window mastic in Flemings (1 mile south-west), Ash (1 mile north-west), Weddington (1 mile north), Guilton (1 mile west) and Hammill Park (1 mile south). Larger places within reach include Canterbury (9 miles west), Margate (8 miles north-east), Dover (9 miles south), Folkestone (14 miles south-west), Ramsgate (7 miles north-east) and Broadstairs (9 miles north-east).
Near you in Coombe
We work in homes and buildings around The Chequer Inn and Sandwich Technology School. Coombe’s nearest station is Sandwich station, about 2.1 miles east. A little further out are White Mill (1.6 miles east). Open spaces near Coombe include Monk's Wall nature reserve.
How the visit works
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It generally takes a few hours for a few frames, or a day or more for a whole house. For a village or hamlet like Coombe, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Before we arrive
- Clear items away from the joints we’re working on
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
Getting a quote
For window mastic in Coombe, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Read more
Your questions about window mastic in Coombe
Will you come out to Coombe?
Yes, Coombe is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Sandwich station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Is the work guaranteed?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
What information do you need?
A short description and the location. If we need more, we will ask.
Do you work on first-floor windows?
Yes, where it’s safe. For high or awkward windows, we will tell you what access is needed.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can new window sealant be painted?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you’re decorating and we’ll choose accordingly.