Oxfordshire · England
Sand Mastic in Northway
Sand mastic across Northway and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Mastic round period door frames that has failed
Aftercare tips
Looking after new joints is easy:
- Check the mastic when you check the paintwork
- Sort the mastic before the decorators arrive
- Go gently near the mastic when preparing windows
- Make sure water runs off the sill
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Sand mastic in Northway
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include mastic that needs renewing before redecorating and failed mastic on an exposed elevation, on stone surrounds, period & listed homes and timber door frames.
Houses in smaller places like Northway can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
You get a one-year guarantee, the same in Northway as everywhere else we work.
- Where
- Northway (OX3)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Honest limits
Before you book, it’s worth knowing the limits:
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
- Broken panes
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before booking.
Where we work in Northway
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Timber door frames
- Tenement windows
- Brick reveals
Common problems we fix in Northway
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Any of these means the joints need attention:
- Weathered mastic on the most exposed windows
- Modern sealant on a period surround
- Open joints round the window box
- Gaps round a timber door in stone or brick
For site and facilities teams at buildings such as New Marston Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- What insurance they hold
- What the cure time is
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
Windows and doors in Northway
With historic houses such as Holywell Manor (about 1.5 miles south-west) nearby, there’s older building stock in the area around Northway 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 is 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.
Letting a property close to Oxford station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For an older house near a landmark such as St Anthony of Padua, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Northway is about 1 mile north of Oxford, in Oxfordshire. For sand mastic in and around Northway, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Oxfordshire from our Crawley base, Northway included. We cover 443 towns and villages across Oxfordshire, large and small.
Every address in OX3 is within our area for sand mastic. Local streets include Copse Lane, Marsh Lane and Upway Road. With the A40 close by, Northway is simple for us to get to for sand mastic. Other places close to Northway include Headington (1 mile south-east), Marston (1 mile north-west), New Marston (1 mile south-west), Headington Hill (1 mile south) and Headington Quarry (1 mile south-east). We also work in nearby towns such as Didcot (11 miles south), Bicester (9 miles north), Abingdon-on-Thames (7 miles south), Witney (12 miles west), Thame (11 miles east) and Wantage (15 miles south-west).
Landmarks near Northway
We work in homes and buildings around English Faculty Library, Bury Knowle Park and Cheney School. Also close by are Rye St Antony School (0.8 miles south) and White Hart Inn (0.6 miles south-east). For rail, the closest station is Oxford station, about 2.4 miles south-west of the centre. Nearby you will also find Churchill Hospital (0.5 miles south) and Oxford Castle (2.2 miles south-west). The countryside around Northway includes Headington Hill and CS Lewis Nature Reserve.
Also near Northway
What else we do in Northway
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What affects the quote in Northway
For a quick quote, just ask. The main things that affect it are:
- The product the joint needs
- How many areas need sealing
- When we can work, for business premises
- The size of the job
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before we start.
What we need to know
When you call or email, these details help:
- The rough size of the job
- The type of property
- Any previous sealing or DIY work
- The problem you’ve noticed
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Common questions in Northway
Do you cover smaller places like Northway?
Yes, Northway is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Oxford station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
How much does sand mastic cost in Northway?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
Where are you based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you replace silicone on a period window with sand mastic?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
How the visit works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a single window, longer for several. A visit to Northway is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
If you are in Northway and need sand mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Related advice
Landlords, agents and businesses in Northway
If you manage several properties in or around Northway, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.