Hampshire · England
External Mastic in The Hummicks
We cover The Hummicks for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Damp patches traced to an open external joint
- Joints with sealant missing in places
- Rigid filler in a joint that should flex
FAQs for The Hummicks
Will you come out to The Hummicks?
Yes, we do. 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.
Do you work for landlords with property near Beaulieu Road station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is it OK to fill a movement joint with cement?
No. Cement or mortar cannot stretch and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Is it messy?
We keep the work tidy. Nearby surfaces are protected.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
External mastic in The Hummicks, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. We work on render & cladding joints, concrete & block and joints between brick and frames, and the jobs we see most are plants rooting in failed movement joints and water getting into walls through failed joints.
External sealant needs dry, clean surfaces, so work around The Hummicks is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Where
- The Hummicks (SO42)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near The Hummicks
Other services in The Hummicks
What the job involves on each surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- The number of rooms or windows
- Whether the work is at height
- Any working-time requirements on site
- Any mould that needs treating
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
There’s no standard price list. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or send us an email.
Looking after it afterwards
So the new joints stay in good condition:
- Deal with leaking gutters that soak the joints below
- Don’t let climbing plants root in the sealant
- Make sure movement joints aren’t pointed over
- Act on the first splits you see
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Leave it or put it right?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a small place like The Hummicks, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in The Hummicks
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
- Full insurance on every job
- Old sealant always removed completely
Read our cost guide or customer reviews.
How it works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to several days, depending on the building. For a village or hamlet like The Hummicks, 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.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Concrete & block
Outside joints around The Hummicks
The Hummicks is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of the Blessed Virgin and Child, an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Beaulieu Village Primary School, its movement joints, gutters and trims need looking after like any other building’s.
The Hummicks is about 4 miles south-west of Hythe, in Hampshire. Homes, rented property, offices and hotels in The Hummicks can book us for external mastic, old or new, large or small. The work is guaranteed for a year. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. You can also see our page for Southampton, about 7 miles away.
All of SO42 is within our area for external mastic, from the main roads to the quietest streets. We also cover the places around The Hummicks: Bailey's Hard (1 mile south-west), Beaulieu (1 mile north-west), East Boldre (2 miles west), Furzey Lodge (2 miles west) and Dibden Purlieu (3 miles north). We also work in nearby towns such as Gosport (12 miles east), Eastleigh (11 miles north), Fareham (11 miles east), Totton (8 miles north-west), Chandler's Ford (12 miles north) and Hedge End (9 miles north-east).
Around The Hummicks
Typical jobs here are in homes near The New Forest Academy and The Montagu Arms and the streets around them. The Hummicks’s nearest station is Beaulieu Road station, roughly 4.2 miles north-west of the centre. Well-known places in the area include Beaulieu Abbey And Display Of Monastic Life (1.1 miles north-west) and Lymington New Forest Hospital (5.9 miles south-west).
What we are called out for in The Hummicks
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and make things worse.
These are the problems we’re asked about most:
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
Letting a property close to Beaulieu Road station? Then split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before booking
- How long to leave it before use
- Whether they’re fully insured
- Whether you can choose the colour
- What guarantee comes with the work