Oxfordshire · England
Window & door mastic in Newnham Murren, Oxfordshire
Mastic around window and door frames, sills and patio doors in Newnham Murren, with a 12-month guarantee on every job. Call for a quick quote.
- Cold air getting in at the frame edge
- Cracked or shrunken mastic around the frame
- Mastic that is falling out in pieces
Window mastic for homes and businesses in Newnham Murren
Over two decades of sealing frames has taught us which products suit which walls. We’re fully insured ARBOMaster approved applicators, and we give a one-year guarantee on the work. We work on composite doors, window sills and timber windows & doors, and the jobs we see most are mastic that’s falling out in pieces and gaps between the frame and the inside reveal.
Mastic can only go onto a dry, clean joint, so window work in Newnham Murren is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Newnham Murren (OX10)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Newnham Murren: your questions answered
Do you cover smaller places like Newnham Murren?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Newnham Murren in your area for window mastic?
Yes. Our work covers London and the South East, and Newnham Murren is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
How long does it take to reseal the windows on a house?
Allow a morning for a couple of windows and a door. Access and how stubborn the old mastic is affect the time most.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
What does window mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Can resealing stop a draught around my window?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Do you work for landlords and businesses?
Yes. We work in homes, commercial premises and hotels, and we’re fully insured.
Places near Newnham Murren
Other services in Newnham Murren
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
- Penetrating damp from a failed cavity tray or render
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in Newnham Murren
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
Keeping the joints in good condition
So the new joints stay in good condition:
- Wipe condensation off the frames
- Don’t paint over the silicone
- Wash the frames with mild soapy water
- Look round the frames every year or so
Silicone can’t generally be painted, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
When to call us in Newnham Murren
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us are:
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
- Gaps left after new windows were fitted
- Old mastic that has gone black or come away
For landlords with property near Cholsey station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What your quote should include
- The length of the guarantee
- Whether the sealant suits the joint
- How the joint is cleaned and prepared
- Whether VAT is included
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, 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.
Newnham Murren homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Brightwell Manor (about 2.5 miles north-west) nearby, there’s older building stock in the area around Newnham Murren as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Crowmarsh Gifford Church of England School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of St Mary Magdalene, the joint between an old wall and a newer frame is generally the first place rain gets in.
Newnham Murren is about 2 miles south of Benson, in Oxfordshire. Whether you’re in the middle of Newnham Murren or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Oxfordshire, we cover 443 places, Newnham Murren among them. For nearby work, see our Reading page (12 miles or so).
Every address in OX10 is within our area for window mastic, from the main roads to the quietest streets. You’ll find streets such as The Street, Halifax Road and Hasthorpe Road, all of which we cover. If you’re just outside Newnham Murren, we cover Crowmarsh Gifford (1 mile north-east), Mongewell (1 mile south), Winterbrook (1 mile south-west), North Stoke (2 miles south) and Cholsey (2 miles south-west). Larger places within reach include Oxford (12 miles north-west), Didcot (6 miles west), Abingdon-on-Thames (9 miles north-west), Thame (12 miles north-east), Wantage (13 miles west) and Henley-on-Thames (10 miles south-east).
Local landmarks in Newnham Murren
Around Newnham Murren, our work takes us to homes and buildings near Kinecroft, Wallingford School and Wallingford School. The closest station to Newnham Murren is Cholsey station, roughly 2.5 miles south-west. A little further out are Wallingford Castle (0.6 miles north-west). Not far away are Wittenham Clumps and Cholsey Marsh.
The process
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a handful of frames, longer for a whole house for a typical job. In a small place like Newnham Murren, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
Getting a quote
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
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Quotes for window mastic in Newnham Murren
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How easy the joints are to reach
- When we can work, for business premises
- The size of the job
- How much old sealant there is and how hard it is to remove
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and send you a clear quote before we start.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Where the job is, and your postcode
- What’s wrong with the joints now
- Any previous sealing or DIY work
- A few pictures by email, if you can
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
What happens if it’s left?
The work is quick compared with the damage it prevents: it takes a few hours for a handful of frames, longer for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. Older cottages and farmhouses around Newnham Murren can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What you get with us
- Homes, businesses and hotels
- Neat joints and a tidy finish
- Over 20 years’ experience
- 180+ five-star Google reviews
Read our cost guide or our reviews.