Oxfordshire · England
Marcham New Build Mastic
New build mastic across Marcham and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Messy sealant that spoils new finishes
- Internal frame sealant that has split
- Leaking shower tray seals in a new home
Do you need new build mastic in Marcham?
New homes are full of moisture from plaster, screed and concrete, and it dries out over the first couple of years. As it does, timber shrinks and joints open, and sealant that cannot keep up splits.
The most common problems we see are:
- Gaps between new skirting and floors
- Gaps behind new kitchen upstands
- Gaps opening as the house dries out and settles
- Internal frame sealant that has split
Around Marcham, as everywhere, new build mastic is only as good as the preparation behind it.
What to look for in a quote
- What insurance they hold
- Which colour the sealant will be
- The length of the guarantee
- How long to leave it before use
New build mastic in Marcham
Snagging sealant properly means taking the failed bead out completely. New silicone will not bond to old silicone, so the joint is cut out, cleaned, dried and resealed. We are often asked to deal with sealant applied over dusty or wet surfaces and messy sealant that spoils new finishes, on skirting & floors, windows & doors and bathrooms & en suites.
In and around Marcham, floors range from older timber boards to tiles and newer finishes, each moving in its own way. Skirting and threshold joints need a sealant that suits the floor.
Your job is guaranteed for a year, as with all our work.
- Where
- Marcham (OX13)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in Marcham
Different surfaces, different methods
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. A proper reseal keeps water in the tray.
Landlord and commercial work in Marcham
For anyone letting property in or around Marcham, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We work for letting agents and landlords as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It will not solve:
- Baths and trays that move too much for sealant to cope with
- Structural cracks in walls or ceilings
- Leaking fittings rather than failed sealant
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Where we work in Marcham
- Windows & doors
- Skirting & floors
- Kitchens
- Show homes
- Plot handovers
- Bathrooms & en suites
New build mastic around Marcham
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.
If you’ve bought a new home near Radley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Marcham is about 3 miles west of Abingdon-on-Thames, in Oxfordshire. We carry out new build mastic for homes and businesses in Marcham, as part of our work across Oxfordshire. Marcham is one of 443 towns and villages in Oxfordshire we cover. You can also see our page for Oxford, roughly 7 miles from Marcham.
Work in OX13 works the same way as everywhere else we cover. If you need new build mastic at a property on Haines Court, Orchard Way and Elwes Road or anywhere close by, we can help. Nearby, we also carry out new build mastic in Frilford (1 mile west), Frilford Heath (1 mile north-west), Cothill (2 miles north), Tubney (2 miles north-west) and Shippon (2 miles north-east). Larger places within reach include Oxford (7 miles north-east), Didcot (6 miles south-east), Abingdon-on-Thames (3 miles east), Witney (10 miles north-west), Carterton (13 miles north-west) and Wantage (6 miles south-west).
Around Marcham
Locally, jobs take us to homes and businesses close to Larkmead School and The Crown Public House. The closest station to Marcham is Radley station, about 4.4 miles east of the centre. Well-known places in the area include Abingdon Community Hospital (1.7 miles east) and FitzHarris Castle (2.5 miles east). Green spaces nearby include Hitchcopse Pit and Cumnor Hill.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Marcham: your questions answered
Is Marcham within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do new build mastic in Marcham?
Yes, Marcham is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
Can you do plot mastic on a new development?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What should I tell you?
A short description and the location, with photos by email if possible. We’ll ask anything else we need to know.
Should I go to my builder first?
Report it to the builder first while you are covered. If it is not resolved, we can reseal it properly.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for most snagging lists, longer for a run of plots from start to finish. Parking around Marcham is usually 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.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Read more
What affects the cost of new build mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- The product the joint needs
- Whether the work is at height
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Roughly how big the job is
- What’s wrong with the joints now
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.