Oxfordshire · England
Window Mastic in Sunnymead
Window mastic for Sunnymead, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked or shrunken mastic around the frame
- Gaps between the frame and the inside reveal
- Damp patches on the reveal after heavy rain
Frames and glazing around Sunnymead
The South East is one of 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 Holywell Manor (about 2.1 miles south) are a reminder that the area around Sunnymead has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Oxford Parkway station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. If you look after a building such as Cutteslowe Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Sunnymead is about 3 miles north-west of Oxford, in Oxfordshire. If you need window mastic in Sunnymead, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Oxfordshire from our Crawley base, Sunnymead included. Across Oxfordshire, we cover 443 places, Sunnymead among them.
Our applicators cover all of the OX2 postcode area for window mastic and the streets around it. Streets in the area include Wren Road, Scott Road and Wyatt Road. Main roads around Sunnymead include the A4165, which makes travel easy. We also cover the places around Sunnymead: Cutteslowe (1 mile north), Summertown (1 mile south), North Oxford (1 mile south), Wolvercote (1 mile west) and Park Town (1 mile south). Larger places within reach include Oxford (3 miles south-east), Didcot (12 miles south), Bicester (9 miles north-east), Abingdon-on-Thames (7 miles south), Witney (10 miles west) and Carterton (14 miles west).
Around Sunnymead
Around Sunnymead, our work takes us to homes and buildings near St Hugh's College Main Building Including Library, Oxford University Parks and Dew Drop Inn, among other places. Also close by are Summer Fields School (0.5 miles south) and Oxford Academy (0.7 miles south). The closest station to Sunnymead is Oxford Parkway station, roughly 1.4 miles north of the centre. Nearby you will also find Oxford Castle (2.3 miles south) and Oxford University Museum of Natural History (1.8 miles south). Open spaces near Sunnymead include Hook Meadow and The Trap Grounds and Headington Hill.
Window mastic in Sunnymead, done properly
Frames and walls do not move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on uPVC windows, window sills and patio & French doors, and people most often call us about gaps where the sill meets the wall and cold air getting in at the frame edge.
In smaller places like Sunnymead, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Sunnymead (OX2)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Sunnymead
Also in Sunnymead
What affects the cost of window mastic
We quote each job individually. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- Any mould that needs treating
- How easy the joints are to reach
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
What to tell us for a quote
When you call or email, it’s useful to know:
- The rough size of the job
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- Whether it’s a home or a business
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or send us an email.
Common problems we fix in Sunnymead
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
Signs it’s time to call us include:
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
- Cold air getting in at the frame edge
- Cracked internal joints between frame and plaster
In the older streets around Roman Catholic Church of St Gregory and St Augustine, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- How the surfaces are prepared before sealing
- How much experience the applicator has
- The length of the guarantee
- Whether the sealant suits the joint
Common questions in Sunnymead
Do you cover Sunnymead for window mastic?
Yes, Sunnymead is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
I let a flat near Oxford Parkway station. Can you help?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
When is the sealant fully cured?
It depends on the product. Before we leave, we’ll tell you the cure time.
How do I get a quote for window mastic in Sunnymead?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or send us an email and let us know what needs doing and where.
Are you insured?
Yes. Full insurance covers our work.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
How the job changes by surface
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We’ll tell you if that’s what we find.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. In a smaller place like Sunnymead, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about any water getting in
- Clear the area around the work
How to get a quote
Want a quote for window mastic? Please ring 0345 464 0079 or send us an email with a few details. We will explain what we’d do and send you a clear quote before any work starts.
Advice
Aftercare tips
A little care helps the new joints last. Our advice:
- Avoid blasting the frames with a pressure washer
- Paint up to the joint, not over it
- Use gentle cleaners on frames and sealant
- Do not use solvent cleaners on the joint
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Why it’s worth doing now in Sunnymead
Running fresh sealant over the old joint is tempting, but new sealant can’t bond to old, crumbling mastic. It peels before long, and water still gets in behind. The old mastic has to come out. In an older home around Sunnymead, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- More than 20 years in sealant work
- Homes, businesses and hotels
- We leave the area clean and tidy
Take a look at our cost guide and customer reviews.