Kent · England
Window & door mastic in Kennington, Kent
Professional window mastic in and around Kennington, with every bit of old sealant taken out first.
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- Water coming in at the bottom corners of a door
Window mastic in Kennington: local notes
Historic houses like Godinton House (about 2.3 miles west) are a reminder that the area around Kennington 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. 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.
If you live in an older home near Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as Kennington Church of England Academy, its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Ashford International station, renewing tired window mastic between tenants heads off draught and damp complaints.
Kennington is about 2 miles north-east of Ashford, in Kent. Every kind of property in Kennington can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Kennington is one of 922 places in Kent where we work for window mastic. Chelmsford is on our list too, around 43 miles away.
All of TN24 and TN25 is covered for window mastic. If you need window mastic at a property on Park Road, York Road and Ball Lane or anywhere close by, our applicators can take on the job. Being close to the A28, Kennington is simple for us to get to. If you are just outside Kennington, we cover Bockhanger (1 mile south-west), Potters Corner (1 mile west), Boughton Lees (2 miles north), Godinton (2 miles south-west) and Willesborough (2 miles south). We also work in nearby towns such as Canterbury (12 miles north-east), Sittingbourne (14 miles north-west), Folkestone (13 miles south-east), Whitstable (14 miles north-east), Faversham (10 miles north) and Hythe (11 miles south-east).
Local landmarks in Kennington
In Kennington, that means homes and buildings near Towers School and Sixth Form Centre, Conningbrook Lakes Country Park and The Rose Inn and the streets around them. The closest station to Kennington is Ashford International station, about 1.7 miles south of the centre. Well-known places in the area include County Square (1.4 miles south-west) and William Harvey Hospital (2.1 miles south-east). Not far away are Hatch Park.
Window mastic in Kennington
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. We work on window sills, composite doors and uPVC windows, and the jobs we see most are water coming in at the bottom corners of a door and cracked or shrunken mastic around the frame.
Around Kennington, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
Your job is guaranteed for a year, as with all our work.
- Where
- Kennington (TN24, TN25)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Kennington
Is Kennington within the area you cover?
Yes, Kennington is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Ashford International station. Can you help?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Can you quote for more than one area?
Yes. Just list everything you need.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses.
Does the work come with a guarantee?
Yes. Every job comes with our one-year guarantee, and we are ARBOMaster approved applicators.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is there any odour?
There can be a smell while the sealant cures. Ventilation helps.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
What affects the quote in Kennington
The quote reflects the job in front of us. We look at:
- Whether there’s mould to deal with
- How easy the joints are to reach
- Any working-time requirements on site
- The product the joint needs
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that’s easy
- The rough size of the job
- Whether it’s a home or a business
- Any access issues, like height or stairs
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Condensation trapped between the panes
- Penetrating damp from a failed cavity tray or render
- Broken hinges, locks or handles
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- uPVC windows
- Aluminium frames
- Window sills
- Patio & French doors
- Composite doors
- Timber windows & doors
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What happens if it’s left?
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Around Kennington, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
What you get with us
- Colour picked to suit the job
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
- An ARBOMaster approved applicator
Read our cost guide or our reviews.
Also near Kennington
Also in Kennington
Landlords, agents and businesses in Kennington
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
How it works
The work is kept neat and contained to the joints we are treating. The job normally takes anything from an hour or two to a full day, depending on how many frames there are. For a job in Kennington, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- 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
- Move anything stored near the joints
- On commercial sites, let us know about site rules
Ask for a quote
If you’re in Kennington and need window mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Read more
How the job changes by surface
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the new bead is laid against the frame and the wall and tooled smooth.