Buckinghamshire · England
New-build mastic & snagging in Coombe, Buckinghamshire
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Coombe. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between new skirting and floors
- Gaps opening as the house dries out and settles
- Messy sealant that spoils new finishes
New build mastic in Coombe
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. If you have cracked sealant around new window and door frames and worktop and upstand sealant coming away, we can put it right, on windows & doors, skirting & floors and show homes alike.
Somewhere as small as Coombe, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Every job is covered by a one-year guarantee.
- Location
- Coombe (HP17)
- Region
- Buckinghamshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Small cosmetic gaps can wait for the house to settle, but water getting through cannot. If you are unsure which you have, call 0345 464 0079 or send us an email with pictures and we will give you a straight answer. Where a wall is exposed, as many are in small places like Coombe, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- ARBOMaster approved applicator
- Domestic, commercial and hotel work
- Colour picked to suit the job
Read what affects the cost and what customers say.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The process
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for most snagging lists, longer for a run of plots. Somewhere like Coombe needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Clear the area around the work
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
When to call us in Coombe
Fresh sealant can be knocked or cut by trades finishing off. If it’s disturbed before curing, the joint can be left weak.
Keep an eye out for these signs:
- Cracks appearing as a new home settles
- Kitchen sealant that has pulled off the wall
- Plot mastic for developers ahead of handover
- Untidy sealant flagged on a snagging list
In and around Coombe, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- Who turns up on the day
- What the quote includes, VAT included or not
- How hidden problems are handled
- What product goes in the joint
Also in Coombe
FAQs for Coombe
Is Coombe in your area for new build mastic?
Yes. Our work covers London and the South East, and Coombe is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Is Coombe within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you take on second-fix sealing for builders?
Yes. We work through plots to your schedule, room by room. Tell us the plots and the joints involved and we’ll quote.
Can new sealant go on top of the old bead?
No. Over-sealing traps mould and water and soon fails. All the old sealant comes out before any work starts.
My new home is still under warranty. Should I contact you?
Report it to the builder first while you’re covered. Once that’s done, or if they won’t put it right, we will cut it out and reseal it.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
Can landlords and businesses book you?
Yes, regularly. Several properties can be quoted together.
How long will you be here?
As a guide, most jobs take anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we’ll tell you how long to expect.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
Different surfaces, different methods
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
How we quote for new build mastic
Call for a quick quote. The main things that affect it are:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
When you call or email, it’s useful to know:
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Pictures of the joints, sent by email
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details, and photos are welcome.
New build mastic around Coombe
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Little Kimble station, the sealant around baths, showers and frames is worth checking in the first year or two.
Coombe is about 5 miles south of Aylesbury, in Buckinghamshire. For new build mastic in and around Coombe, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Buckinghamshire from our Crawley base. Our Buckinghamshire coverage runs to 263 places, and Coombe is one of them. There’s also a page for Oxford, roughly 19 miles from Coombe.
Postcode districts we cover here for new build mastic: HP17. We also cover Butler's Cross (1 mile north), Ellesborough (1 mile north-west), Chalkshire (1 mile north), Terrick (1 mile north) and Nash Lee (1 mile north). Larger places within reach include Aylesbury (5 miles north), High Wycombe (8 miles south), Chesham (8 miles east), Marlow (12 miles south), Amersham (9 miles south-east) and Beaconsfield (11 miles south-east).
Landmarks near Coombe
Locally, jobs take us to homes and businesses close to John Colet School and The Russell Arms and the streets around them. The nearest railway station is Little Kimble station, roughly 1.3 miles west. A little further out are Little Kimble Motte (1 mile west) and Trenchard Museum (3.1 miles north-east). Not far away are Brush Hill Local Nature Reserve and Coombe Hill.