Kent · England
External & façade joints in Hartlip, Kent
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Hartlip. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Water getting into walls through failed joints
External mastic in Hartlip
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you are dealing with sealant that has lost its bond to the brick or render and rigid filler in a joint that should flex, we can help.
Older homes in small places like Hartlip may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water generally gets in.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Location
- Hartlip (ME9)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Hartlip buildings and the weather
Hartlip is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
If you let a flat or house near Newington station, outside joints that have cracked can let damp into a rental, so check them between lets. For an older house near a landmark such as Church of St Michael, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Hartlip is about 3 miles south-east of Gillingham, in Kent. Whether you are in the middle of Hartlip or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Hartlip is one of 922 towns and villages in Kent we cover. There’s also a page for Chelmsford, roughly 28 miles from Hartlip.
We work across ME9 for external mastic and the streets around it. That includes homes and businesses on The Street, Dane Close and Place Lane. Neighbouring places we cover for external mastic include Lower Hartlip (1 mile east), Moor Street (1 mile north-west), Breach (1 mile north-east), Meresborough (1 mile west) and Newington (1 mile east). Larger places within reach include Maidstone (7 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (14 miles north-west) and Minster (9 miles north-east).
Landmarks near Hartlip
Typical jobs here are in homes near Leigh Academy Rainham and Foxburrow Wood, among other places. The closest station to Hartlip is Newington station, about 1.3 miles east. Other landmarks nearby include Bayford Court (4.5 miles east) and Medway Maritime Hospital (4.8 miles north-west). The countryside around Hartlip includes Detling Hill and Bishop Saltings.
Common problems we fix in Hartlip
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and speed up the damage.
People normally contact us after spotting one of these:
- Water getting into walls through failed joints
- Gaps where render, brick and frames meet
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
For site and facilities teams at buildings such as Hartlip Endowed Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- How the joint is cleaned and prepared
- Is VAT in the price?
- What guarantee comes with the work
- Is the old sealant removed completely?
How the job changes by surface
Cladding and façade panels
If the façade has a specified sealant, that is what we use, or one the system allows. Send us any details you have about the façade.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
How the visit works
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. In a small place like Hartlip, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Keep pets and children clear of the area while we work
Ask for a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Read more
Towns and villages near Hartlip
What else we do in Hartlip
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How many areas need sealing
- The product the joint needs
- Whether there’s mould to deal with
- The old material and how stubborn it is
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Helping us quote
You do not need to know the technical terms. Just tell us:
- How we’d reach the joints
- Photos by email, if that’s easy
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
For external mastic in Hartlip, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
What we can’t put right
New sealant can’t fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Subsidence or other structural problems
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Copings & trims
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Your questions about external mastic in Hartlip
Do you work for landlords with property near Newington station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Do you cover smaller places like Hartlip?
Yes, Hartlip is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
How often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a one-year guarantee.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we are using.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Why act early in Hartlip
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Older cottages and farmhouses around Hartlip can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Hartlip
- We agree the colour with you first
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
Read what affects the cost and our reviews.