Oxfordshire · England
Window & door mastic in Jericho, Oxfordshire
Window mastic for Jericho and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
- White mastic on grey or black frames
How we handle window mastic in Jericho
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on aluminium frames, uPVC windows and patio & French doors, and common reasons people get in touch are leaking joints at the ends of sills and black, perished sealant on frames.
Around Jericho, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
All our work comes with our 12-month guarantee.
- Location
- Jericho (OX1, OX2)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need window mastic in Jericho
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
The problems people generally mention when they call are:
- Rushed sealant from a window installation
- Gaps between the frame and the inside reveal
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
If you let a flat or house near Oxford station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Questions to ask before you book
- What happens if the job turns out different
- The length of the guarantee
- Whether the sealant suits the joint
- Are they insured?
How the job changes by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal and we avoid acetoxy silicones, which can react with some metals. We use a neutral-cure product.
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that, where a rigid one would crack.
What we do, step by step
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take most of a day for a typical house, less for a few frames. Parking around Jericho is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or email us.
Advice
Landlord and commercial work in Jericho
Housing providers, facilities teams and property managers book us too in Jericho and across Oxfordshire. Several sites can go on one quote, and we are fully insured.
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Why act early in Jericho
Working on frames from a ladder with a sealant gun isn’t easy, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. In an older home around Jericho, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Why choose Mr Mastic in Jericho
- 4.9 on Google from 180+ five-star reviews
- 12-month guarantee on every job
- A choice of colours where the product allows
- Trusted Arbo and Everbuild sealants
See what affects the cost and our reviews.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Make sure the drainage slots are not blocked
- Keep timber frames painted
- Ventilate rooms so frames don’t stay wet inside
- Do not use solvent cleaners on the joint
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Common questions in Jericho
Is Jericho in your area for window mastic?
Yes. We work across London and the South East, and Jericho is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Do you cover smaller places like Jericho?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Can I paint over the new sealant?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months.
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. If it doesn’t work out, we can redo it.
How long before the joint can be used?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
Other services in Jericho
Frames and glazing around Jericho
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Holywell Manor (about 0.9 miles east) nearby, there’s older building stock in the area around Jericho as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around St Barnabas Church, the joint between an old wall and a newer frame is usually the first place rain gets in. If you look after a building such as St Barnabas' Church of England Aided Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Jericho is about 2 miles west of Oxford, in Oxfordshire. Whether you’re in the middle of Jericho or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 443 towns and villages across Oxfordshire.
Postcode districts we cover here for window mastic: OX1 and OX2. Whether your property is on Abbey Road, Combe Road and Pusey Lane or anywhere close by, we can help. You’ll find Jericho on the A4144, so it’s easy for us to get to. We also cover Walton Manor (1 mile north), St John Street area (1 mile south-east), Park Town (1 mile north-east), Norham Manor (1 mile north-east) and Osney (1 mile south-west). Larger places within reach include Didcot (10 miles south), Bicester (11 miles north-east), Abingdon-on-Thames (6 miles south), Witney (10 miles west), Carterton (14 miles west) and Thame (13 miles east).
Landmarks near Jericho
Around Jericho, our work takes us to homes and buildings near Oxford University Parks, The Rickety Press pub and The Eckersley School of English. Nearby too are Oxford Academy (1.1 miles north) and Somerville College Library (within half a mile east). The closest station to Jericho is Oxford station, roughly 0.5 miles south of the centre. A little further out are Oxford University Press Museum (under half a mile south-east) and Clarendon Shopping Centre (0.7 miles south-east). Open spaces near Jericho include Hook Meadow and The Trap Grounds and Harcourt Hill.
Quotes for window mastic in Jericho
Call for a quick quote. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- The size of the job
- Access and height
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- The type of property
- The problem you’ve noticed
- Where the property is
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 come back to you with a quote.