Oxfordshire · England
Window Mastic in Lyneham
Professional window mastic in and around Lyneham, with old sealant always removed completely and a 12-month guarantee.
- A bead that doesn’t match the frame
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
How it works
A visit follows a simple pattern: 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 like Lyneham needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know about parking restrictions
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Getting a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
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Window mastic for homes and businesses in Lyneham
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you’re dealing with sealant in the wrong colour for the frame and hard, cracked sealant around windows, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Lyneham is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Lyneham (OX7)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Window mastic in Lyneham: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Shipton station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Lyneham is about 8 miles north of Carterton, in Oxfordshire. Homes, rented property, offices and hotels in Lyneham can book us for window mastic, old or new, large or small. The work is guaranteed for a year. 443 places in Oxfordshire are on our list. You can also see our page for Oxford, roughly 18 miles from Lyneham.
Work in OX7 is quoted and booked the same way as anywhere else. Nearby, we also carry out window mastic in Shipton-under-Wychwood (2 miles south), Ascott Earl (2 miles south-east), Ascott-under-Wychwood (2 miles south-east), Ascott d'Oyley (2 miles south-east) and Chilson (3 miles east). Within a short drive, we also cover Witney (8 miles south-east), Carterton (8 miles south), Kidlington (14 miles east), Chipping Norton (5 miles north-east), Woodstock (11 miles east) and Cogges (8 miles south-east).
What’s near Lyneham
The nearest railway station is Shipton station, roughly 1.1 miles south.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Use gentle cleaners on frames and sealant
- Walk round the house once a year and look at the joints
- Keep drainage slots and sill grooves clear
- Ventilate rooms so frames do not stay wet inside
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Housing providers, facilities teams and property managers book us too in Lyneham and across Oxfordshire. Several sites can go on one quote, and we are fully insured for the work.
Towns and villages near Lyneham
What else we do in Lyneham
Questions from Lyneham
Can you do window mastic in Lyneham?
Yes. Our work covers London and the South East, and Lyneham is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Do you work for landlords with property near Shipton station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Can you get sealant to suit coloured frames?
Yes. Anthracite grey, black, brown and white cover most frames, with clear as an option.
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.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Quotes for window mastic in Lyneham
We quote each job individually. These are the things that affect it:
- Whether there’s mould to deal with
- The product the joint needs
- How much there is to do
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
What we need to know
Photos by email are helpful but not essential. Please mention:
- The rough size of the job
- The problem you’ve noticed
- Any access issues, like height or stairs
- Where the job is, and your postcode
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear quote before we start.
Signs you need window mastic in Lyneham
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Look out for any of the following:
- Hard, cracked sealant around windows
- Old mastic that has gone black or come away
- Water coming in at the bottom corners of a door
- A bead that does not match the frame
Around Lyneham, as everywhere, window mastic is only as good as the preparation behind it.
Questions to ask before booking
- What guarantee comes with the work
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- Are they insured?
When something else is needed
It helps to know what we cannot do too:
- Worn gaskets, brush seals or a door that has dropped
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Lyneham
- uPVC windows
- Aluminium frames
- Window sills
- Composite doors
- Timber windows & doors
- Patio & French doors
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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.