Kent · England
Maidstone External Mastic
External mastic for Maidstone, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Panel joints letting water in
- Weathered mastic that no longer stretches
- Rain getting behind render or cladding at a joint
External mastic for homes and businesses in Maidstone
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. We are often asked to deal with failed seals between different materials and movement joints filled with mortar instead of sealant, across concrete & block, copings & trims and render & cladding joints.
Flats, offices and shops in Maidstone have long runs of movement joints, cladding joints and roofline trims. When those fail, water gets behind the face of the building, often unseen until it shows inside.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
How the job changes by surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Places near Maidstone
Also in Maidstone
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. In a busy place like Maidstone, a failed joint in a flat or office can send water into the space below, where it can go unnoticed until the damage is done.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
- A choice of colours where the product allows
- We agree the colour with you first
See our cost guide and our reviews.
FAQs for Maidstone
Do you work for landlords with property near Maidstone West station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Is external mastic in Maidstone guaranteed?
All our work, in Maidstone and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Should I point up the gap in my brickwork?
No. Cement or mortar can’t stretch. If it has already been filled, we can usually cut it out and reseal it.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
How the visit works
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to several days, depending on the building. For homes and businesses in busier parts of Maidstone, parking needs a little planning. For flats, mention stairs, lifts and shared entrances as well.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear quote.
Related advice
When to call us in Maidstone
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
These are the problems we are asked about most:
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
- Plants rooting in failed movement joints
For landlords with property near Maidstone West station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- Whether they seal over old material or remove it
- How hidden problems are handled
- What preparation is included
- How long to leave it before use
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- Mould in or behind the old joints
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The rough size of the job
- The problem you’ve noticed
- Pictures of the joints, sent by email
- Where the property is
Asking for a quote is easy: tell us what needs doing and where. A few photos by email make the job easier to understand.
Walls and rooflines in Maidstone
With historic houses such as Stoneacre (about 2.4 miles south-east) nearby, there’s older building stock in the area around Maidstone as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as South Borough Primary School, its movement joints, gutters and trims need looking after like any other building’s. Homes close to St Philip's Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Maidstone is about 31 miles south-east of London, in Kent. We provide external mastic to householders, landlords and businesses in Maidstone and nearby. Our Kent coverage runs to 922 places, Maidstone among them. We also work in London, about 31 miles from Maidstone.
Work in ME15, ME16, ME14 and ME17 is quoted and booked the same way as anywhere else. You will find streets such as Square Hill Road, Arundel Square and Square Hill, and we cover them all. You will find Maidstone on the A20 and A26, which makes it straightforward to reach with everything needed for external mastic. If you’re just outside Maidstone, we cover Tovil (1 mile west), Foley Park (1 mile north), Shepway (1 mile south-east), Penenden Heath (1 mile north) and Weavering (1 mile east). Further out, we also cover Sittingbourne (10 miles north-east), Sevenoaks (15 miles west), Royal Tunbridge Wells (14 miles south-west), Gravesend (13 miles north-west), Tonbridge (12 miles south-west) and Northfleet (14 miles north-west). Maidstone is among the bigger towns we cover in Kent.
What’s near Maidstone
Locally, jobs take us to homes and businesses close to St Augustine Academy, River Len LNR and Maidstone Grammar School and the streets around them. For rail, the closest station is Maidstone West station, about 0.6 miles north-west of the centre. Other landmarks nearby include Maidstone Carriage Museum (within half a mile north-west) and Oakwood Hospital (1.8 miles west). Open spaces near Maidstone include Burham Down and Boxley Hills.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
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, and the work is guaranteed for a year.