Oxfordshire · England
Window & door mastic in Blewbury, Oxfordshire
Mastic around window and door frames, sills and patio doors for Blewbury, backed by a 12-month guarantee. Ask us for a quote.
- Old mastic that has gone black or come away
- Draughty joints inside around the window
- Hard, cracked sealant around windows
About our window mastic in Blewbury
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. Typical jobs include draughts coming in around windows and doors and gaps where the sill meets the wall, on composite doors, timber windows & doors and aluminium frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Blewbury is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Blewbury (OX11)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Blewbury
For anyone letting property in or around Blewbury, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Clear any debris from frame drain holes
- Air rooms to keep condensation down around windows
- Avoid blasting the frames with a pressure washer
- Clean frames with a soft cloth and soapy water
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just call 0345 464 0079 or email us.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before we start. Most jobs take a few hours for a few frames, or a day or more for a whole house. In a small place like Blewbury, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Tell us about any water getting in
- Move anything stored near the joints
- Mention any parking rules near the property
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we will take it from there.
Advice
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Blewbury: your questions answered
Will you come out to Blewbury?
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.
I let a flat near Didcot Parkway station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Where do you work from?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
How we quote for window mastic
We quote each job individually. This is what makes a difference:
- The number of rooms or windows
- Mould in or behind the old joints
- The type of sealant required
- The number and length of the joints
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- If someone has resealed it before
- A few pictures by email, if you can
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Surface by surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
Frames and glazing around Blewbury
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Brightwell Manor (about 4.1 miles north-east) are a reminder that the area around Blewbury has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Homes close to Church of St Michael include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Blewbury Endowed Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Didcot Parkway station, renewing tired window mastic between tenants heads off draught and damp complaints.
Blewbury is about 3 miles south of Didcot, in Oxfordshire. Jobs in Blewbury get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Oxfordshire, we cover 443 places, and Blewbury is one of them. There’s also a page for Oxford, roughly 12 miles from Blewbury.
All of OX11 is within our area for window mastic, from the main roads to the quietest streets. Whether your property is on Church Road, London Road and Church End or anywhere close by, our applicators can take on the job. We also cover Woodway (1 mile south), Upton (1 mile north-west), Aston Tirrold (1 mile east), East Hagbourne (2 miles north) and West Hagbourne (2 miles north-west). Larger places within reach include Oxford (12 miles north), Didcot (3 miles north), Abingdon-on-Thames (8 miles north), Wantage (8 miles west), Henley-on-Thames (14 miles east) and Grove (9 miles west).
Near you in Blewbury
Locally, jobs take us to homes and businesses close to St Birinus School and The Load of Mischief pub and the streets around them. The nearest railway station is Didcot Parkway station, roughly 2.9 miles north. Other landmarks nearby include Brightwell Castle (4.1 miles north-east) and Atlas Computer Laboratory (3.5 miles west). The countryside around Blewbury includes Mowbray Fields and Churn Hill.
Honest limits
A few problems are outside what sealant work can do:
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
- Worn gaskets, brush seals or a door that has dropped
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Where we work in Blewbury
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Composite doors
- Patio & French doors
- Window sills