Oxfordshire · England
Sibford Ferris Window Mastic
Mastic around window and door frames, sills and patio doors for Sibford Ferris, backed by a 12-month guarantee. Call for a quick quote.
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
- Gaps left after new windows were fitted
Why it’s worth doing now in Sibford Ferris
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Where a wall is exposed, as many are in small places like Sibford Ferris, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why Sibford Ferris customers choose us
- You choose the colour before work begins
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal silicone where joints get wet
- 4.9 on Google from 180+ five-star reviews
Take a look at what affects the cost or customer reviews.
About our window mastic in Sibford Ferris
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and we give a 12-month guarantee on the work. Common call-outs are for damp patches on the reveal after heavy rain and draughty joints inside around the window, on patio & French doors, uPVC windows and composite doors.
Around Sibford Ferris, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Sibford Ferris (OX15)
- Region
- Oxfordshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
At the end, we look at the finished work together. The visit itself normally takes a few hours for a few frames, or a day or more for a whole house, depending on the size of the job. Somewhere as small as Sibford Ferris, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- 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.
How to prepare
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Ask for a quote
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Also near Sibford Ferris
What else we do in Sibford Ferris
How the job changes by surface
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it, where a rigid one would crack.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
What affects the cost of window mastic
Jobs vary more than people expect. What affects the quote:
- The size of the job
- The number of rooms or windows
- The product the joint needs
- When we can work, for business premises
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Asking for a quote
To make quoting easier, let us know:
- Whether it’s a home or a business
- If someone has resealed it before
- The rough size of the job
- What’s wrong with the joints now
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or send us an email.
What window mastic looks like in Sibford Ferris
With historic houses such as Broughton Castle (about 3.8 miles east) nearby, there’s older building stock in the area around Sibford Ferris as well as newer homes. 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. 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.
Managing a site like Sibford School? Then the mastic around its windows and doors needs looking after like any other building’s.
Sibford Ferris is about 6 miles west of Banbury, in Oxfordshire. We provide window mastic to homes and businesses in Sibford Ferris and nearby, as part of our work across Oxfordshire. Across Oxfordshire, we cover 443 places, Sibford Ferris among them. Our Oxford page covers work nearby.
Every address in OX15 is within our area for window mastic, from the main roads to the quietest streets. Local streets include Main Street, Back Lane and Cotswold Close, and we cover them all. Nearby, we also carry out window mastic in Burdrop (1 mile north), Sibford Gower (1 mile north-west), Swalcliffe (1 mile east), Epwell (2 miles north) and Tadmarton (2 miles east). Larger places within reach include Banbury (6 miles east), Chipping Norton (7 miles south-west), Neithrop (5 miles east), Grimsbury (7 miles east), Ruscote (5 miles east) and Woodstock (14 miles south-east).
What’s near Sibford Ferris
Typical jobs here are in homes near Sibford Gower Endowed Primary School. Well-known places in the area include Broughton Castle (3.8 miles east). Open spaces near Sibford Ferris include Woodford Bottom and Lamb's Pool and Castle Hill.
Sibford Ferris questions
Is Sibford Ferris in your area for window mastic?
Yes. Our work covers London and the South East, and Sibford Ferris is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Will you come out to Sibford Ferris?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Can you get sealant to suit coloured frames?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you when we finish.
Can you seal over the old sealant?
No, it won’t last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Honest limits
A few problems are outside what sealant work can do:
- Damp coming through the wall itself rather than the frame joint
- Faulty window hardware
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Window sills
- Composite doors
- uPVC windows
- Patio & French doors
- Aluminium frames
- Timber windows & doors
Common problems we fix in Sibford Ferris
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Common reasons people contact us are:
- Mastic that’s falling out in pieces
- Damp patches on the reveal after heavy rain
- Gaps between the frame and the inside reveal
- A bead that does not match the frame
In the older streets around Church of Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- What product goes in the joint
- What the cure time is
- Whether all the old sealant comes out first
- Whether VAT is included
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep jet washers away from the mastic
- Walk round the house once a year and look at the joints
- Wipe condensation off the frames
- Paint up to the joint, not over it
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.