Essex · England
The Common New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes in The Common, with a 12-month guarantee on every job. Call for a quick quote.
- Cracked sealant around new window and door frames
- Second-fix sealing on new plots
- Sealant applied over dusty or wet surfaces
New build mastic in The Common
We never seal over a failed new-build bead. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. We work on skirting & floors, bathrooms & en suites and windows & doors, and common reasons people get in touch are new-build shower sealant that has already split and internal frame sealant that has split.
Around The Common, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
You get a 12-month guarantee, the same in The Common as everywhere else we work.
- Where
- The Common (CB10)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Also near The Common
Other services in The Common
What the job involves on each surface
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Skirting and floors
Wet-area floor joints need a flexible seal. We seal them with a sealant suited to wet areas.
When something else is needed
Sealant isn’t the answer to every problem, and we’ll tell you before we start. Sealant won’t put right:
- Settlement cracks that need a surveyor
- Leaking fittings rather than failed sealant
- Broken tiles or a split tray
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Plot handovers
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Windows & doors
- Show homes
Do you need new build mastic in The Common?
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, and sealant that cannot keep up splits.
The problems people generally mention when they call include:
- Plot mastic for developers ahead of handover
- Smeared, uneven beads picked up at snagging
- Leaking shower tray seals in a new home
- Frame joints opening as the plaster dries
Around The Common, 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
- How long the guarantee is
- What the cure time is
- How the colour is chosen
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. It generally takes a few hours for most snagging lists, longer for a run of plots. Somewhere like The Common needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- We check every joint and leave you with the cure times.
How to prepare
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Get a quote
Want a quote for new build mastic? Please call 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear quote before work begins.
Related advice
Common questions in The Common
Do you cover The Common for new build mastic?
Yes. Our work covers London and the South East, and The Common is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Will you come out to The Common?
Yes. The Common is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you fully insured?
Yes. We’re fully insured.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can you do plot mastic on a new development?
Yes. We work through plots to your schedule. Tell us the plots and the joints involved and we will quote.
I’m a tenant. Can you help?
Of course. Ask your landlord first, and we can send them the quote if that helps.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you when we finish.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or drop us an email.
How to look after the new joints
After the cure time, these simple habits help:
- Record problems with dated photos
- Report sealant problems to your builder during the snagging period
- Avoid running a DIY bead over the old one
- Avoid scourers and strong chemicals on sealant
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Catching it early keeps the fix to the sealant.
Why it’s worth doing now in The Common
DIY kits don’t solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. Around The Common, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why The Common clients choose us
- We leave the area clean and tidy
- Experience in homes, commercial sites and hotels
- Every job guaranteed for a year
- You choose the colour before work begins
Read what affects the cost and what customers say.
New build mastic around The Common
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.
For jobs in and around The Common, choosing the right material for each joint is as important as a tidy finish.
The Common is about 4 miles east of Saffron Walden, in Essex. For new build mastic in and around The Common, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Essex, The Common included. The Common is one of 644 towns and villages in Essex we cover for new build mastic. There’s also a page for Chelmsford, roughly 21 miles from The Common.
Our applicators cover all of CB10 for new build mastic. Close by, we work in Radwinter (1 mile south), Maple End (1 mile south-west), Wimbish (2 miles south-west), Hempstead (2 miles east) and Church End (3 miles north-west). Within a short drive, we also cover Braintree (13 miles south-east), Saffron Walden (4 miles west), Halstead (14 miles south-east), Great Dunmow (10 miles south), Stansted Mountfitchet (10 miles south-west) and Great Notley (14 miles south-east).
Around The Common
A little further out are Castle Camps (2.8 miles north-east) and Saffron Walden Community Hospital (3.5 miles west). The countryside around The Common includes Hales and Shadwell Woods.