Kent · England
Window & door mastic in Newnham, Kent
Window mastic in Newnham from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Black, perished sealant on frames
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
Why act early in Newnham
Failed mastic isn’t a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we’ll tell you. Older cottages and farmhouses around Newnham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
- 20+ years of sealant experience
- 4.9 on Google from 180+ five-star reviews
Read how sealant jobs are priced or our reviews.
How we handle window mastic in Newnham
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. Typical jobs include rushed sealant from a window installation and black, perished sealant on frames, on composite doors, patio & French doors and uPVC windows.
Homes in small places like Newnham often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee.
- Where
- Newnham (ME9)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Newnham and across Kent. Several sites can go on one quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Quotes for window mastic in Newnham
There’s no set price list. What we look at:
- Whether the work is at height
- The amount of work
- Any working-time requirements on site
- Any mould that needs treating
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
When you contact us, these details help:
- Where the property is
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work.
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- A sash or casement that will not close properly
- Condensation trapped between the panes
- Soft or decayed wood in the frame
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
What we seal
- Composite doors
- Timber windows & doors
- uPVC windows
- Window sills
- Aluminium frames
- Patio & French doors
How the visit works
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take a morning for a couple of windows and a door. Somewhere as small as Newnham, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Advice
What we’re called out for in Newnham
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. That is what backing rod is for.
The most common problems we see are:
- Cracked sealant at the sill ends
- Draughty joints inside around the window
- Black, perished sealant on frames
- Whistling draughts around closed windows
Letting a property close to Teynham station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- Whether all the old sealant comes out first
- Is VAT in the price?
- How much experience the applicator has
- How the joint is cleaned and prepared
Places near Newnham
What else we do in Newnham
What the job involves on each surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour suits the frame.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Common questions in Newnham
Do you cover Newnham for window mastic?
Yes. Our work covers London and the South East, and Newnham is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear quote.
Will you come out to Newnham?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long before the joint can be used?
It depends on the product. Before we leave, we will tell you the cure time.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
What window mastic looks like in Newnham
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Belmont House and Gardens (about 2.2 miles south-east) are a reminder that the area around Newnham has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like Eastling Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of St Peter and St Paul, the joint between an old wall and a newer frame is generally the first place rain gets in.
Newnham is about 4 miles south-west of Faversham, in Kent. Anywhere in ME9, we cover window mastic for homes and businesses. Newnham is one of 922 towns and villages in Kent where we work for window mastic. We also work in Chelmsford, around 34 miles away.
We work across ME9 for window mastic and the streets around it. You’ll find streets such as The Street, Sharsted Hill and Newnham Lane. Nearby, we also carry out window mastic in Doddington (1 mile west), Wichling (2 miles west), Bluetown (2 miles west), Hollybushes (3 miles west) and Payden Street (3 miles south-west). Larger places within reach include Maidstone (12 miles west), Ashford (10 miles south), Canterbury (12 miles east), Sittingbourne (5 miles north-west), Whitstable (11 miles north-east) and Faversham (4 miles north-east).
Local landmarks in Newnham
We work in homes and buildings around The George Inn and Doddington Place Gardens and the streets around them. The closest station to Newnham is Teynham station, about 3.4 miles north of the centre. Other landmarks nearby include Newnham Castle (within half a mile north-east).