Oxfordshire · England
Window & door mastic in Hardwick, Oxfordshire
Professional window mastic in and around Hardwick, with old sealant always removed completely and a 12-month guarantee.
- Cracked or shrunken mastic around the frame
- Mastic that’s falling out in pieces
- Water coming in at the bottom corners of a door
Different surfaces, different methods
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. We match the colour to the frame.
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.
How we handle window mastic in Hardwick
Over two decades of sealing frames has taught us which products suit which walls. We are ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. We are often asked to deal with white mastic on grey or black frames and damp patches on the reveal after heavy rain, on aluminium frames, uPVC windows and composite doors.
Around Hardwick, 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.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or email us.
- Location
- Hardwick (OX27)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What window mastic looks like in Hardwick
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.
Letting a property close to Bicester North station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Hardwick is about 4 miles north of Bicester, in Oxfordshire. Hardwick gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Oxfordshire coverage runs to 443 places, and Hardwick is one of them. You can also see our page for Oxford, roughly 15 miles from Hardwick.
Every address in OX27 is covered for window mastic. We also cover the places around Hardwick: Hethe (1 mile east), Stoke Lyne (1 mile south-west), Fringford (2 miles east), Bucknell (3 miles south-west) and Stratton Audley (3 miles south-east). Larger places within reach include Oxford (15 miles south), Banbury (10 miles north-west), Bicester (4 miles south), Kidlington (11 miles south-west), Headington Quarry (14 miles south) and Bure Park (4 miles south).
Local landmarks in Hardwick
Around Hardwick, our work takes us to homes and buildings near Whitmore Arms Public House, among other places. The closest station to Hardwick is Bicester North station, roughly 4.2 miles south of the centre. Well-known places in the area include Ardley Castle (2.8 miles south-west) and Bicester Community Hospital (4.6 miles south).
What we can’t put right
To be straight with you, some problems need a different trade:
- Faulty window hardware
- Draughts through the window seals rather than the frame
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Window sills
- Timber windows & doors
- Patio & French doors
- Composite doors
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of frames, longer for a whole house. Somewhere like Hardwick 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 go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Mention any tricky access
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
How to get a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Related advice
Quotes for window mastic in Hardwick
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
- Which sealant suits the joint
- Mould in or behind the old joints
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and agree the price before starting.
What we need to know
Before you ask for a quote, have a think about:
- Where the property is
- Pictures of the joints, sent by email
- How we’d reach the joints
- Whether it has been sealed before
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or drop us an email.
Looking after it afterwards
To keep the joints looking good and working properly:
- Repaint timber before it’s bare
- Do not paint over the silicone
- Make sure the drainage slots aren’t blocked
- Keep solvents and bleach off the sealant
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Also near Hardwick
Also in Hardwick
Signs you need window mastic in Hardwick
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. Backing rod sets the right depth.
The most common problems we see are:
- Black, perished sealant on frames
- A bead that does not match the frame
- Water coming in at the bottom corners of a door
- Hard, cracked sealant around windows
In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- How hidden problems are handled
- How long the guarantee is
Your questions about window mastic in Hardwick
Do you cover smaller places like Hardwick?
Yes, Hardwick is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Bicester North station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Can resealing stop a draught around my window?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Do you guarantee window mastic?
Yes. Every job comes with our one-year guarantee, and we’re ARBOMaster approved applicators.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
What should I tell you?
A short description and the location, with photos by email if possible. If we need more, we’ll ask.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
We also work for property managers and facilities teams in Hardwick and across Oxfordshire. We can quote a run of properties together.