Buckinghamshire · England
Long Crendon New Build Mastic
New-build sealant joints in Long Crendon need attention? We cut out the old, prepare the joints and apply the right sealant.
- Sealant that never bonded to the surface
- Gaps behind new kitchen upstands
- Shower seals failing in the first year or two
Long Crendon questions
Do you work for landlords with property near Haddenham & Thame Parkway station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is Long Crendon in your area for new build mastic?
Yes, Long Crendon is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
What does new build mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
How long does new build mastic take?
A typical job takes a few hours in a single home, including the preparation. Your quote will say how long we expect yours to take.
Do you have insurance?
Yes. We are fully insured.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Can I send you my snagging list?
Yes. Send it with pictures and we will quote for the sealant items. If something is not sealant, we’ll say so.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
About our new build mastic in Long Crendon
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly instead of bonding to the dust. We work on windows & doors, show homes and plot handovers, and the jobs we see most are gaps opening as the house dries out and settles and beads laid onto grit and dust from the build.
For a new home in or near Long Crendon, it’s worth checking the sealant early. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Place
- Long Crendon (HP18)
- Wider area
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Long Crendon
A new house holds a lot of water from the build, which takes a year or two to dry out. As it does, timber shrinks and joints open.
Keep an eye out for these signs:
- Sealant applied over dusty or wet surfaces
- Cracked sealant around new window and door frames
- Plot mastic for developers ahead of handover
- Gaps behind new kitchen upstands
Around Long Crendon, as everywhere, new build mastic is only as good as the preparation behind it.
Questions to ask before booking
- What product goes in the joint
- Is VAT in the price?
- What happens if the job turns out different
- How the colour is chosen
Aftercare tips
Good habits help new joints last longer. A few tips:
- Do not wait for the house to settle if water is getting through
- Follow the cure time we give you
- Keep pictures and emails about snagging items
- Raise failed sealant with the developer while you are covered
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it as they wear the bead.
Mould takes hold quickly in sealant that has gaps or lifted edges. Dealing with it before it goes black saves a harder job later.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Joints and finishes in Long Crendon homes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Haddenham & Thame Parkway station, the sealant around baths, showers and frames is worth checking in the first year or two.
Long Crendon is about 2 miles north-west of Thame, in Buckinghamshire. Anywhere in HP18, our applicators can take on new build mastic. Across Buckinghamshire, we cover 263 places, Long Crendon among them. There’s also a page for Oxford, about 10 miles away.
All of HP18 is covered for new build mastic. If you need new build mastic at a property on High Street, The Square and Giffard Way or anywhere close by, we can help. We also cover Chearsley (2 miles north-east), Thame (2 miles south-east), Moreton (3 miles south), Haddenham (3 miles east) and Cuddington (3 miles north-east). Within a short drive, we also cover Aylesbury (8 miles east), High Wycombe (15 miles south-east), Buckingham (15 miles north), Elmhurst (9 miles north-east), Southcourt (8 miles east) and Princes Risborough (8 miles south-east).
Around Long Crendon
Locally, jobs take us to homes and businesses close to Lord Williams's School and The Eight Bells Public House and the streets around them. The nearest railway station is Haddenham & Thame Parkway station, roughly 2.3 miles east. Other landmarks nearby include Dinton Castle (4.7 miles east) and Thame Community Hospital (2.4 miles south-east). Open spaces near Long Crendon include Snakemoor.
What we can’t put right
To be straight with you, there are a few things sealant will not fix:
- Plumbing faults behind the sealant
- A tray or bath that is not properly supported, until it’s fixed
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Plot handovers
- Show homes
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Skirting & floors
Why act early in Long Crendon
A quick bead over the top of the old sealant can look fine at first, but it won’t bond to the old layer. A lasting seal starts with removing the old one completely. Homes in smaller places like Long Crendon 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.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
- Domestic, commercial and hotel work
- Anti-fungal silicone where joints get wet
Take a look at our cost guide and customer reviews.
How it works
On the day, we look over the joints with you first, so there are no surprises. 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. Parking around Long Crendon is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- 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 pets and children clear of the area while we work
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
Get a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
Read more
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.