Oxfordshire · England
Window Mastic in New Marston
Window mastic in New Marston from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant in the wrong colour for the frame
- Rain getting in at the frame or under the sill
- Cold air getting in at the frame edge
Window mastic in New Marston: local notes
With historic houses such as Holywell Manor (about 0.7 miles south-west) nearby, there’s older building stock in the area around New Marston as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Saint Michael and All Angels include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Oxford station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
New Marston is about 1 mile north of Oxford, in Oxfordshire. Our applicators cover window mastic for householders, landlords and businesses in New Marston and nearby. Our area takes in 443 places across Oxfordshire, large and small.
Postcode districts we cover here for window mastic: OX3, OX1 and OX4. We cover properties on Ferry Road, Croft Road and Copse Lane and the roads around them. Neighbouring places we cover for window mastic include Headington Hill (1 mile south-east), Northway (1 mile north-east), Oxford (1 mile south), St Clement's (1 mile south) and Norham Manor (1 mile west). Within a short drive, we also cover Didcot (11 miles south), Bicester (10 miles north), Abingdon-on-Thames (6 miles south), Witney (11 miles west), Carterton (15 miles west) and Thame (11 miles east).
Landmarks near New Marston
Around New Marston, our work takes us to homes and buildings near English Faculty Library, Cheney School and Headington Hill Park. Also close by are Rye St Antony School (0.5 miles south-east) and White Horse pub (0.8 miles south-east). The nearest railway station is Oxford station, about 1.6 miles south-west of the centre. Nearby you will also find Clarendon Shopping Centre (1.2 miles south-west) and Churchill Hospital (0.7 miles east). Green spaces nearby include Headington Hill and CS Lewis Nature Reserve.
About our window mastic in New Marston
Around New Marston we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you are dealing with rain getting in at the frame or under the sill and mastic that has split away from the wall, we can help.
Houses in smaller places like New Marston can stand more in the open than those in a built-up town. That’s hard on the mastic around frames and sills.
There’s a 12-month guarantee on every job.
- Where
- New Marston (OX3, OX1, OX4)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Soft or decayed wood in the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp coming through the wall itself rather than the frame joint
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
Signs you need window mastic in New Marston
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid cannot stretch. Backing rod sets the right depth.
Common reasons people contact us include:
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
- Hard, cracked sealant around windows
- Gaps where the sill meets the wall
For site and facilities teams at buildings such as St Michael's CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Is the old sealant removed completely?
- Whether you can choose the colour
- What happens if the job turns out different
- What preparation is included
What affects the quote in New Marston
Call for a quick quote. The main things that affect it are:
- When we can work, for business premises
- How many areas need sealing
- Whether the work is at height
- The old material and how stubborn it is
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- A few photos by email, if you can
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Questions from New Marston
Do you work for landlords with property near Oxford station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Is New Marston in your area for window mastic?
Yes, New Marston is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
How do I get a quote for window mastic in New Marston?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or drop us an email and let us know what needs doing and where.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
When is the sealant fully cured?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Surface by surface
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain can’t run into the wall.
Towns and villages near New Marston
More services for New Marston
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes most of a day for a typical house, less for a few frames. Parking around New Marston is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Keep children and pets away from the work area
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Getting a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
Advice
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.