Oxfordshire · England
Window & door mastic in Newington, Oxfordshire
Window mastic in Newington from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps left after new windows were fitted
- Sealant in the wrong colour for the frame
- Whistling draughts around closed windows
Surface by surface
Composite doors
A composite door generally sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones aren’t used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Window mastic for homes and businesses in Newington
Around Newington we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on aluminium frames, window sills and uPVC windows, and common reasons people get in touch are old mastic that has gone black or come away and rain getting in at the frame or under the sill.
Outdoor sealant needs dry, clean surfaces, so work on frames around Newington is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Newington (OX10)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about window mastic in Newington
Is Newington in your area for window mastic?
Yes, Newington is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Is there a guarantee on window mastic in Newington?
All our work, in Newington and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you seal inside as well as outside?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Will resealing my frames help with draughts?
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 new window sealant be painted?
Silicone generally will not take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Is there any odour?
There can be a smell while the sealant cures. Ventilation helps.
Why it’s worth doing now in Newington
Getting a straight, even bead on an outside frame takes practice, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Where a wall is exposed, as many are in small places like Newington, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why book with us
- Experience in homes, commercial sites and hotels
- More than 20 years in sealant work
- ARBOMaster approved applicator
- A choice of colours where the product allows
Take a look at how sealant jobs are priced or what customers say.
Frames and glazing around Newington
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Garsington Manor (about 3.6 miles north-west) nearby, there’s older building stock in the area around Newington as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of St Giles, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Newington is about 7 miles north-east of Didcot, in Oxfordshire. Every kind of property in Newington is covered for window mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 443 places across Oxfordshire. You can also see our page for Oxford, about 8 miles away.
Our applicators cover all of OX10 for window mastic. We also cover the places around Newington: Great Holcombe (1 mile south), Drayton St Leonard (1 mile west), Brookhampton (1 mile north-west), Stadhampton (1 mile north) and Berrick Salome (2 miles south). Further out, we also cover Oxford (8 miles north-west), Didcot (7 miles south-west), Abingdon-on-Thames (7 miles west), Thame (8 miles north-east), Wantage (14 miles west) and Henley-on-Thames (13 miles south-east).
Near you in Newington
Locally, jobs take us to homes and businesses close to The Catherine Wheel pub and the streets around them. Other landmarks nearby include Littlemore Hospital (5.7 miles north-west) and Brightwell Castle (4.3 miles south-west). Green spaces nearby include Wittenham Clumps and Wells Farm.
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Towns and villages near Newington
Other services in Newington
What happens on the day
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours for a handful of frames, longer for a whole house. For a village or hamlet like Newington, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Mention any leaks or damp you’ve noticed
- Mention any tricky access
- Let us know about earlier repairs to the joints
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
Related advice
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep timber frames painted
- Walk round the house once a year and look at the joints
- Keep paint off silicone joints
- Keep jet washers away from the mastic
Most silicone sealants won’t take paint, so mention any painting plans before we start. We can use a paintable sealant where that matters.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
What we’re called out for in Newington
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Any of these means the joints need attention:
- Damp patches on the reveal after heavy rain
- Gaps between the frame and the inside reveal
- Whistling draughts around closed windows
- Cracked or shrunken mastic around the frame
Around Newington, as everywhere, window mastic is only as good as the preparation behind it.
Comparing quotes
- What the cure time is
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
- Who turns up on the day
Quotes for window mastic in Newington
We do not publish a price list, because no two jobs are the same. The quote depends on:
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
- Any mould that needs treating
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.