Oxfordshire · England
New-build mastic & snagging in Northway, Oxfordshire
New build mastic for Northway and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Kitchen sealant that has pulled off the wall
- Beads laid onto grit and dust from the build
- Gaps between new skirting and floors
New build mastic for homes and businesses in Northway
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the new bead bonds properly rather than sitting on a layer of grit. We work on windows & doors, kitchens and bathrooms & en suites, and the jobs we see most are smeared, uneven beads picked up at snagging and skirting joints opening in the first winter.
In smaller places like Northway, new homes tend to come as small developments or single plots. Each still needs its sealant and floor joints finished properly from day one.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Where
- Northway (OX3)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for new build mastic in Northway
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- The size of the job
- How many areas need sealing
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 drop us an email and we’ll talk you through it.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- Where the property is
- The rough size of the job
- A few photos by email, if you can
- Any access issues, like height or stairs
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand.
Northway: your questions answered
Is Northway within the area you cover?
Yes. Northway 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.
Can you do new build mastic in Northway?
Yes, Northway is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you when we finish.
Why does sealant fail so quickly in new builds?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can you match the sealant colour to my new kitchen or bathroom?
White and clear are the most common, but other colours are available. We match the colour to the finish.
Nearby places to Northway
More services for Northway
Why it’s worth doing now in Northway
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot and most come down to preparation. Homes in smaller places like Northway can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before we start, so you know where you stand.
Why book with us
- We’re fully insured
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
- Old sealant always removed completely
Take a look at what affects the cost or customer reviews.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Leaks from pipes, valves or wastes, which need a plumber
- Cracked trays, tiles or worktops
- Baths and trays that move too much for sealant to cope with
If in doubt, call 0345 464 0079 or email us and we will say what we think.
What we seal
- Windows & doors
- Kitchens
- Skirting & floors
- Bathrooms & en suites
- Plot handovers
- Show homes
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Avoid scourers and strong chemicals on sealant
- Raise failed sealant with the developer while you are covered
- Avoid running a DIY bead over the old one
- Ventilate bathrooms well, especially in the first year
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant and the new finishes intact.
What the job involves on each surface
Skirting and floors
Floors and skirting move as the house dries and the heating runs. Caulk cracks; a flexible sealant moves with it.
Show homes
Tired or marked sealant in a show home can be renewed. We cut it out and reseal neatly.
What new build mastic looks like in Northway
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In and around Northway, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. For new homes near Oxford station, it’s worth checking the sealant early, while snags are still fresh.
Northway is about 1 mile north of Oxford, in Oxfordshire. Our applicators cover new build mastic for homeowners, landlords and businesses in Northway. Our area takes in 443 places across Oxfordshire, large and small.
Work in OX3 is quoted and booked the same way as anywhere else. We cover properties on Copse Lane, Marsh Lane and Upway Road. Main roads around Northway include the A40, so getting to you is simple. Nearby, we also carry out new build mastic in 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). Within a short drive, we also cover 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).
Local landmarks in Northway
We work in homes and buildings around English Faculty Library, Bury Knowle Park and Cheney School and the streets around them. Other local landmarks include 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, roughly 2.4 miles south-west of the centre. Other landmarks nearby include Churchill Hospital (0.5 miles south) and Oxford Castle (2.2 miles south-west). Open spaces near Northway include Headington Hill and CS Lewis Nature Reserve.
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 need the right product, the right access and the right method.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
What we do, step by step
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before work begins. Most jobs take anything from a few hours to several days, depending on the number of plots. Parking around Northway 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 start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- We check every joint and tell you how long each needs to cure.
Getting ready for the visit
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.