Oxfordshire · England
New Build Mastic in Marston
We cover Marston for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Gaps opening as the house dries out and settles
- Internal frame sealant that has split
- Kitchen sealant that has pulled off the wall
About our new build mastic in Marston
In a new home, every joint should have a clean, even bead. Smeared, patchy or cracked sealant is worth sorting early, before water reaches anything behind it. If you have frame joints opening as the plaster dries and shower seals failing in the first year or two, we can help, whatever the surface.
Work in a small place like Marston just needs the journey and access planning, and the work itself is the same as on any site.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Marston (OX3, OX2)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Resist patching a failed seal with a tube from the DIY shop
- Get a leaking seal dealt with straight away
- Record problems with dated pictures
- Avoid scourers and strong chemicals on sealant
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers to help keep mould away.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in keeps the job straightforward.
Places near Marston
Other services in Marston
Quotes for new build mastic in Marston
The quote reflects the job in front of us. We take into account:
- Mould in or behind the old joints
- Any working-time requirements on site
- The number and length of the joints
- The product the joint needs
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Where the property is
- The problem you’ve noticed
- A few photos by email, if you can
- The type of property
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
Why act early in Marston
For developers, getting the sealant right first time saves return visits. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. Around Marston, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why us?
- Fully insured
- Colour picked to suit the job
- 180+ five-star Google reviews
- We never seal over old sealant
Take a look at what affects the cost or what customers say.
New build mastic in Marston: local notes
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.
If you’ve bought a new home near Oxford station, the sealant around baths, showers and frames is worth checking in the first year or two.
Marston is about 2 miles north of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Marston can book us for new build mastic. Every job comes with our one-year guarantee. Across Oxfordshire, we cover 443 places, and Marston is one of them.
All of OX3 and OX2 is covered for new build mastic, from the main roads to the quietest streets. That includes homes and businesses on Back Lane, Mill Lane and Butts Lane and the roads around them. We also cover the places around Marston: Northway (1 mile south-east), New Marston (1 mile south), Norham Manor (1 mile south-west), Summertown (1 mile west) and North Oxford (1 mile west). Larger places within reach include Didcot (12 miles south), Bicester (9 miles north), Abingdon-on-Thames (7 miles south), Witney (11 miles west), Carterton (15 miles west) and Thame (12 miles east).
Local landmarks in Marston
Typical jobs here are in homes near Oxford University Parks, Oxford Academy and Swan School and the streets around them. Nearby too are Victoria Arms (0.5 miles west) and St Hugh's College Main Building Including Library (1.3 miles south-west). For rail, the closest station is Oxford station, about 2.2 miles south-west. Other landmarks nearby include Pitt Rivers Museum (1.5 miles south-west) and Oxford Castle (2.1 miles south-west). The countryside around Marston includes Headington Hill and Hook Meadow and The Trap Grounds.
Marston questions
Do you work for landlords with property near Oxford station?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Marston?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How do I get a quote for new build mastic in Marston?
Size, access and the old material all affect the cost. Ask us for a quote.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, the joint cleaned and primed where needed, before resealing.
Is it normal for sealant to crack in a new home?
There are normally two causes: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
Do you work for developers?
Yes. We seal plots to the developer’s programme ready for handover. Get in touch with the number of plots and the scope for a clear quote.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
What the job involves on each surface
Skirting and floors
New homes often develop a gap between skirting and floor. We seal it with a flexible sealant that copes with the movement.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Do you need new build mastic in Marston?
Sealant applied onto damp surfaces does not bond well. Site programmes do not always leave time for joints to dry first.
The most common problems we see are:
- Smeared, uneven beads picked up at snagging
- Beads laid onto grit and dust from the build
- New-build shower sealant that has already split
- Joints pulling apart as timber shrinks
Around Marston, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- How long the guarantee is
- Are they insured?
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
Can I do it myself?
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.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
The process
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a village or hamlet like Marston, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Preparing for the visit
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
- Clear the area around the work
How to get a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.