Kent · England
External Mastic in Mott's Mill
External mastic for Mott's Mill, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed sealant between panels on a façade
- Sealant that has lost its bond to the brick or render
- Weathered mastic that no longer stretches
Mott's Mill buildings and the weather
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. Historic houses like Groombridge Place (about 1.6 miles north-east) are a reminder that the area around Mott's Mill has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as Groombridge St Thomas' Church of England Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Thomas the Apostle, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Mott's Mill is about 3 miles north of Crowborough, in Kent. For external mastic in and around Mott's Mill, please phone 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Kent, Mott's Mill included. Mott's Mill is one of 922 places in Kent where we work for external mastic. You can also see our page for Crawley, roughly 16 miles from Mott's Mill.
Our applicators cover all of the TN3 postcode area for external mastic and the streets around it. We also cover Boarshead (2 miles south), Friar's Gate (2 miles south-west), Marden's Hill (2 miles south-west), Steel Cross (2 miles south) and Crowborough (3 miles south). Larger places within reach include Sevenoaks (13 miles north), Royal Tunbridge Wells (5 miles north-east), Tonbridge (8 miles north-east), Paddock Wood (11 miles north-east), Southborough (6 miles north-east) and Edenbridge (9 miles north-west).
Near you in Mott's Mill
Mott's Mill’s nearest station is Eridge station, about 1.3 miles east of the centre. Well-known places in the area include Crowborough War Memorial Hospital (3.2 miles south) and Bolebroke Castle (3.3 miles north-west). The countryside around Mott's Mill includes Broadwater Warren RSPB Reserve.
How we handle external mastic in Mott's Mill
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. Typical jobs include plants rooting in failed movement joints and failed seals between different materials, across brickwork movement joints, render & cladding joints and copings & trims.
Older homes in small places like Mott's Mill may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Mott's Mill (TN3)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we’re called out for in Mott's Mill
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
The most common problems we see are:
- Joints with sealant missing in places
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
Rented homes near Eridge station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- What preparation is included
- How long the guarantee is
- Whether VAT is included
- Whether they’re fully insured
How it works
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job usually takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Mott's Mill, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or drop us an email.
Advice
FAQs for Mott's Mill
Do you cover Mott's Mill for external mastic?
Yes, Mott's Mill is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Will you come out to Mott's Mill?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Towns and villages near Mott's Mill
What else we do in Mott's Mill
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed 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.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Damp that is not coming from the joint
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
What we seal
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
What affects the quote in Mott's Mill
Some jobs are bigger than they look, and some smaller. The main factors:
- Any working-time requirements on site
- The product the joint needs
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The rough size of the job
- Pictures of the joints, sent by email
- Where the property is
- The type of property
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
- Have failed joints looked at early
- Walk round the building once a year and look at the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.