Buckinghamshire · England
Alscot New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Alscot and across Buckinghamshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracks appearing as a new home settles
- Gaps between new skirting and floors
- Worktop and upstand sealant coming away
About our new build mastic in Alscot
In a new home, every joint should have a clean, even bead. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. We work on show homes, windows & doors and bathrooms & en suites, and common reasons people get in touch are cracked sealant around new window and door frames and gaps behind new kitchen upstands.
Around Alscot, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
Your job is guaranteed for a year, as with all our work.
- Location
- Alscot (HP27)
- Region
- Buckinghamshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
In fairness, some problems need a different trade:
- Damaged fittings that need replacing
- A tray or bath that is not properly supported, until it’s fixed
- Structural cracks in walls or ceilings
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Windows & doors
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Kitchens
- Show homes
Common questions in Alscot
Is Alscot in your area for new build mastic?
Yes, Alscot is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
I let a flat near Monks Risborough station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
What does new build mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email and tell us what needs doing and where.
How long will you be here?
That depends on the amount of work, but as a guide it takes a few hours for most snagging lists, longer for a run of plots. We’ll tell you when we quote.
Where do you work from?
We work from Crawley. We cover Alscot and the rest of Buckinghamshire, along with the rest of our area.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can you do several jobs on one visit?
Yes. Just list everything you need.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
When to call us in Alscot
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints aren’t always given time to dry.
These are the problems we’re asked about most:
- Skirting joints opening in the first winter
- Joints pulling apart as timber shrinks
- Smeared, uneven beads picked up at snagging
- Second-fix sealing on new plots
Around Alscot, as everywhere, new build mastic is only as good as the preparation behind it.
Before booking anyone
- How long the guarantee is
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
What affects the quote in Alscot
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- Mould in or behind the old joints
- The old material and how stubborn it is
- Access and height
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Wipe joints with warm soapy water
- Ventilate bathrooms well, especially in the first year
- Avoid running a DIY bead over the old one
- Record problems with dated pictures
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Don’t let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you, so raise it early.
New homes and floors in Alscot
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 Monks Risborough station, the sealant around baths, showers and frames is worth checking in the first year or two.
Alscot is about 6 miles east of Thame, in Buckinghamshire. For new build mastic in and around Alscot, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Buckinghamshire from our Crawley base. Our area takes in 263 places across Buckinghamshire, from the larger towns to small villages. For nearby work, see our Oxford page, about 17 miles away.
We cover every part of the HP27 postcode area for new build mastic and the streets around it. We also cover the places around Alscot: Monks Risborough (1 mile east), Princes Risborough (1 mile south-east), Longwick (1 mile west), Askett (1 mile north-east) and Meadle (1 mile north). Within a short drive, we also cover Aylesbury (6 miles north), High Wycombe (8 miles south-east), Chesham (10 miles east), Marlow (11 miles south), Amersham (11 miles east) and Beaconsfield (12 miles south-east).
What’s near Alscot
In Alscot, that means homes and buildings near The Whiteleaf Cross pub and Princes Risborough School. The closest station to Alscot is Monks Risborough station, about 0.5 miles north-east of the centre. Well-known places in the area include Stoke Mandeville Hospital (4.8 miles north) and Great Kimble Dial Hill (1.7 miles north-east). Green spaces nearby include Beacon Hill and Brush Hill Local Nature Reserve.
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It generally takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as Alscot, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked for movement before we start.
- We remove the failed sealant and clean the joints.
- 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.
Getting ready for the visit
- Tell us if parking is tricky
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Related advice
Landlords, agents and businesses in Alscot
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Landlords and agents in Alscot can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.