Oxfordshire · England
Horspath New Build Mastic
Problem with your new-build sealant joints in Horspath? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Frame joints opening as the plaster dries
- Shower seals failing in the first year or two
- Worktop and upstand sealant coming away
New build mastic for homes and businesses in Horspath
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. Common call-outs are for gaps behind new kitchen upstands and sealant that never bonded to the surface, across show homes, windows & doors and kitchens.
Older homes in small places like Horspath often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
Big or small, it’s backed by our 12-month guarantee in Horspath and across Oxfordshire.
- Place
- Horspath (OX33)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
There isn’t much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours for most snagging lists, longer for a run of plots, including the tidy-up. Somewhere as small as Horspath, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before we start.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Before we arrive
- Keep children and pets away from the work area
- Clear the area around the work
- Mention if the joints have been sealed before
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Common questions in Horspath
Can you help a landlord with a rental near Oxford station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Is Horspath within the area you cover?
Yes. Horspath is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Should I wait before resealing?
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.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
What does new build mastic cost?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or drop us an email and tell us what needs doing and where.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Is the work guaranteed?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Honest limits
New sealant cannot fix everything, and we will tell you before any work starts. Sealant will not put right:
- Baths and trays that move too much for sealant to cope with
- Plumbing faults behind the sealant
- Cracked trays, tiles or worktops
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Horspath
- Show homes
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Windows & doors
- Plot handovers
Why deal with it now?
A quick bead over the top of the old sealant can look fine at first, but it cannot bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. Older cottages and farmhouses around Horspath can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and give you a clear price before any work starts.
What you get with us
- We leave the area clean and tidy
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- Colour agreed with you before we start
Take a look at how sealant jobs are priced and customer reviews.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Do not seal over failed sealant yourself
- Follow the cure time we give you
- Open a window or run the fan after bathing
- Put sealant faults on your snagging list early
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Catching it early keeps the fix to the sealant and protects the rest of the house.
Common problems we fix in Horspath
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.
People generally contact us when they notice one of these:
- Gaps behind new kitchen upstands
- Gaps opening as the house dries out and settles
- Cracked sealant around new window and door frames
- Beads laid onto grit and dust from the build
For new homes near Oxford station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- How long the guarantee is
- Whether all the old sealant comes out first
- What product goes in the joint
- How long to leave it before use
New homes and floors in Horspath
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Horspath, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Horspath is about 3 miles east of Oxford, in Oxfordshire. Every kind of property in Horspath can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 443 places across Oxfordshire.
We cover every part of the OX33 postcode area for new build mastic. We cover properties on Church Road, Manor Drive and Butts Road and the roads around them. We also cover Littleworth (1 mile north-east), Shotover Hill (1 mile north-west), Blenheim (1 mile south-east), Garsington (1 mile south) and Wheatley (2 miles east). Within a short drive, we also cover Oxford (3 miles west), Didcot (10 miles south), Bicester (11 miles north), Abingdon-on-Thames (6 miles south-west), Witney (14 miles west) and Thame (9 miles east).
Around Horspath
In Horspath, that means homes and buildings near Wheatley Park School, Shotover Country Park and Queen's Head pub, among other places. For rail, the closest station is Oxford station, about 4.4 miles west of the centre. Other landmarks nearby include Templars Square (2 miles west) and Slade Hospital (1.3 miles west). Open spaces near Horspath include Shotover and CS Lewis Nature Reserve.
Places near Horspath
Also in Horspath
How we quote for new build mastic
For a quick quote, just ask. The main things that affect it are:
- The number of rooms or windows
- The number and length of the joints
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- If someone has resealed it before
- The rough size of the job
- Where the property is
- Whether it’s a home or a business
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.