Oxfordshire · England
Window & door mastic in Summertown, Oxfordshire
We cover Summertown for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
About our window mastic in Summertown
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. If the draught is through the window seals instead, we’ll tell you. Common call-outs are for gaps left after new windows were fitted and draughts coming in around windows and doors, on patio & French doors, aluminium frames and window sills.
In a smaller place like Summertown, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
Every job comes with a 12-month guarantee.
- Where
- Summertown (OX2, OX3)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of window mastic
The price is agreed before any work begins. It takes into account:
- Whether old sealant or filler has to be cut out
- The amount of work
- Working hours on commercial sites
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What we need to know
When you call or email, these details help:
- The address or postcode of the job
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- What’s wrong with the joints now
Want a quote for window mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Use gentle cleaners on frames and sealant
- Look round the frames every year or so
- Wipe condensation off the frames
- Keep solvents and bleach off the sealant
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Places near Summertown
What else we do in Summertown
Signs you need window mastic in Summertown
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
People generally contact us when they notice something like this:
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
- Sealant in the wrong colour for the frame
- Old mastic that has gone black or come away
If you live in an older home near Church of St Michael and All Angels, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Which colour the sealant will be
- Is the old sealant removed completely?
- What happens if the job turns out different
- Whether they’re fully insured
Surface by surface
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Summertown homes and the weather
With historic houses such as Holywell Manor (about 1.7 miles south-east) nearby, there’s older building stock in the area around Summertown as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Summer Fields School? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Oxford station, renewing tired window mastic between tenants heads off draught and damp complaints.
Summertown is about 2 miles north-west of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Summertown is covered for window mastic. Every job comes with our 12-month guarantee. Our area takes in 443 places across Oxfordshire.
Work in OX2 and OX3 is quoted and booked the same way as anywhere else. We cover properties on Islip Road, Hobson Road and Hernes Road and the roads around them. You’ll find Summertown on the A4165, so it’s easy for us to get to. Nearby, we also carry out window mastic in North Oxford (1 mile south), Sunnymead (1 mile north), Cutteslowe (1 mile north), Park Town (1 mile south) and Norham Manor (1 mile south). We also work in nearby towns such as Didcot (12 miles south), Bicester (10 miles north-east), Abingdon-on-Thames (7 miles south), Witney (10 miles west), Carterton (14 miles west) and Thame (13 miles east).
Near you in Summertown
Locally, jobs take us to homes and businesses close to Oxford Academy, Oxford University Parks and Cutteslowe Primary School, among other places. Nearby too are St Hugh's College Main Building Including Library (0.8 miles south) and Dew Drop Inn (less than half a mile south-east). The nearest railway station is Oxford station, about 1.7 miles south. Other landmarks nearby include Clarendon Shopping Centre (1.8 miles south) and Oxford University Museum of Natural History (1.4 miles south). Open spaces near Summertown include Hook Meadow and The Trap Grounds and Headington Hill.
What we do, step by step
We keep the work tidy and contained to the area we’re working on. The job generally takes a few hours for a handful of frames, longer for a whole house. Parking around Summertown is normally 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.
- 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.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Clear the area around the work
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Read more
Questions from Summertown
Can you help a landlord with a rental near Oxford station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you cover smaller places like Summertown?
Yes. Summertown is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we’re using and why.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
When is the sealant fully cured?
That depends on the sealant used, so follow the cure time we give you.
Landlord and commercial work in Summertown
We work for landlords and agents as well as householders. Resealing between tenancies keeps a property looking cared for.
Hotels need rooms back in use, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
What happens if it’s left?
If you’re painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Around Summertown, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email.
Why Summertown customers choose us
- 4.9 on Google from 180+ five-star reviews
- Colour picked to suit the job
- An ARBOMaster approved applicator
- White, clear, grey or another colour, product permitting
Take a look at our cost guide or our reviews.