Kent · England
Window & door mastic in Goathurst Common, Kent
Specialist window mastic for Goathurst Common: careful preparation, the right product and tidy work. Call for a quick quote.
- Cracked sealant at the sill ends
- Rushed sealant from a window installation
- Cracked internal joints between frame and plaster
When it is not the sealant
Before you book, it’s worth knowing the limits:
- A door that needs adjusting, rehanging or new seals
- A sash or casement that won’t close properly
- Penetrating damp from a failed cavity tray or render
If in doubt, call 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- Window sills
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- uPVC windows
About our window mastic in Goathurst Common
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We work on patio & French doors, aluminium frames and composite doors, and the jobs we see most are white mastic on grey or black frames and gaps between the frame and the inside reveal.
Mastic can only go onto a dry, clean joint, so window work in Goathurst Common is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Goathurst Common (TN14)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Goathurst Common
Also in Goathurst Common
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The biggest DIY mistake is sealing over old sealant. 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.
How the visit works
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes most of a day for a typical house, less for a few frames in most cases. In a small place like Goathurst Common, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Clear the area around the work
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
Get a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Related advice
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- Any mould that needs treating
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Helping us quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- How we’d reach the joints
- A few photos by email, if you can
- The type of property
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
Different surfaces, different methods
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that, where a rigid one would crack.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match keeps the clean look.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Repaint timber before it’s bare
- Wipe condensation off the frames
- Do not paint over the silicone
- Keep drainage slots and sill grooves clear
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Common questions in Goathurst Common
Do you cover smaller places like Goathurst Common?
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.
Can you do window mastic in Goathurst Common?
Yes, Goathurst Common is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
Do the sealants smell?
Possibly a little. It fades as the sealant cures.
Is the new sealant paintable?
It depends on the sealant. Some hybrid sealants can be painted; silicone cannot. Tell us if you’re decorating and we’ll choose accordingly.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you when we finish.
Goathurst Common homes and the weather
With historic houses such as Chartwell (about 2.6 miles west) nearby, there’s older building stock in the area around Goathurst Common as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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 Ide Hill Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Sevenoaks station, renewing tired window mastic between tenants heads off draught and damp complaints. For an older house near a landmark such as Church of St Mary at South End of Village Green, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Goathurst Common is about 3 miles south-west of Sevenoaks, in Kent. Homes, rented property, offices and hotels in Goathurst Common can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Goathurst Common is one of 922 towns and villages in Kent where we work for window mastic. For nearby work, see our Crawley page (17 miles or so).
Postcode districts we cover here for window mastic: TN14. Close by, we work in Ide Hill (1 mile south-west), Toy's Hill (2 miles west), Brasted Chart (2 miles north-west), Sundridge (2 miles north) and Kippington (2 miles north-east). Further out, we also cover Dartford (14 miles north), Sevenoaks (3 miles north-east), Royal Tunbridge Wells (10 miles south-east), Tonbridge (7 miles south-east), Northfleet (15 miles north-east) and Swanley (10 miles north).
Around Goathurst Common
Around Goathurst Common, our work takes us to homes and buildings near Stubbs Wood Country Park and The Cock Inn, among other places. The nearest railway station is Sevenoaks station, about 2.5 miles north-east. Other landmarks nearby include Sevenoaks Hospital (3.5 miles north-east) and Chiddingstone Castle (4.4 miles south). The countryside around Goathurst Common includes Betsom's Hill and Dryhill Nature Reserve.
Landlords, agents and businesses in Goathurst Common
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.