Hertfordshire · England
New-build mastic & snagging in Shillington, Hertfordshire
Our applicators work in Shillington on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Joints pulling apart as timber shrinks
- Kitchen sealant that has pulled off the wall
- Plot mastic for developers ahead of handover
How we handle new build mastic in Shillington
A new build should have a neat, sound bead at every joint. Smeared, patchy or cracked sealant is worth sorting early, before water reaches anything behind it. If you are dealing with skirting joints opening in the first winter and untidy sealant flagged on a snagging list, we can put it right, whatever the surface.
For a small place like Shillington, the journey and access are planned in advance, and the work itself is the same as on any site.
We stand behind the work with a one-year guarantee, so you are covered after we have gone.
- Where
- Shillington (SG5)
- Wider area
- Hertfordshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, 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.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Common questions in Shillington
Is Shillington within the area you cover?
Yes. Shillington 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.
Do you work for landlords with property near Arlesey station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job, wherever you are.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, the joint cleaned and primed where needed, and a new bead applied.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with photos if you can, and we will quote. We will flag anything that needs another trade.
Different surfaces, different methods
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Kitchens
Worktop, upstand and sink joints in new kitchens often get a hurried bead. We take it out and reseal neatly, colour-matched where it shows.
Places near Shillington
Also in Shillington
Signs you need new build mastic in Shillington
When the heating goes on in the first winter, the house dries fast. Skirting, frames and worktops pull away slightly.
Look out for these signs:
- Shower seals failing in the first year or two
- Joints pulling apart as timber shrinks
- Second-fix sealing on new plots
- Cracked caulk along new skirting
In and around Shillington, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Is the old sealant removed completely?
- Who turns up on the day
- What preparation is included
- Whether they’re fully insured
Why deal with it now?
For developers, getting the sealant right first time saves return visits. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. Older cottages and farmhouses around Shillington can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why Shillington customers choose us
- 4.9 on Google from 180+ five-star reviews
- Full insurance on every job
- More than 20 years in sealant work
- Tidy, careful work
Read what affects the cost and customer reviews.
Quotes for new build mastic in Shillington
The quote reflects the job in front of us. We look at:
- Any working-time requirements on site
- Whether the work is at height
- The product the joint needs
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What to tell us for a quote
To help us quote quickly, let us know:
- How we’d reach the joints
- If someone has resealed it before
- Roughly how big the job is
- Where the property is
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few pictures by email make the job easier to understand.
New build mastic in Shillington: local notes
Rainfall in the South East is lower than in much 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 Arlesey station, the sealant around baths, showers and frames is worth checking in the first year or two.
Shillington is about 5 miles north-west of Hitchin, in Hertfordshire. Homes, rented property, offices and hotels in Shillington is covered for new build mastic. The work is guaranteed for a year. Our area takes in 381 places across Hertfordshire, from the larger towns to small villages. London is on our list too, around 36 miles away.
Postcode districts we cover here for new build mastic: SG5. New build mastic is available to properties on Hillfoot Road, New Walk and Church View Avenue and the roads around them. We also cover the places around Shillington: Hanscombe End (1 mile west), Apsley End (1 mile south-west), Pirton (2 miles south-east), Hexton (3 miles south-west) and Pegsdon (3 miles south). Within a short drive, we also cover Stevenage (10 miles south-east), Welwyn Garden City (15 miles south-east), Harpenden (12 miles south), Hitchin (5 miles south-east), Letchworth (6 miles east) and Letchworth Garden City (6 miles east).
What’s near Shillington
Around Shillington, our work takes us to homes and buildings near The Five Bells Public House. For rail, the closest station is Arlesey station, roughly 4.6 miles north-east of the centre. Well-known places in the area include Fairfield Hospital (4.9 miles east) and Stondon Motor Museum (2.1 miles east). The countryside around Shillington includes Cain Hill and Pegsdon Hills.
The process
On the day, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work starts. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a village or hamlet like Shillington, the journey is planned in advance: 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.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
How to prepare
- Clear the area around the work
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or email us.
Related advice
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Deciding who is responsible under a builder’s warranty
- Plumbing faults behind the sealant
- Damaged fittings that need replacing
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Windows & doors
- Skirting & floors
- Plot handovers
- Kitchens