Buckinghamshire · England
External Mastic in Hunt's Green
Specialist external mastic for Hunt's Green: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
Quotes for external mastic in Hunt's Green
We quote each job individually. This is what makes a difference:
- Working hours on commercial sites
- How much there is to do
- How many areas need sealing
- The old material and how stubborn it is
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 the work is at height. Your quote takes all of that into account.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The type of property
- Whether it has been sealed before
- Roughly how big the job is
- Pictures of the joints, sent by email
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
About our external mastic in Hunt's Green
Short cuts in external joints show up within a season or two. 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. Typical jobs include sealant pulling away from one side of the joint and hard, crazed mastic that has stopped moving, across brickwork movement joints, façade panels and copings & trims.
Somewhere as small as Hunt's Green, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Each job carries a 12-month guarantee.
- Location
- Hunt's Green (HP16)
- Wider area
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Hunt's Green
What else we do in Hunt's Green
What we can’t put right
We’ll always be straight with you, so here’s what sealant cannot fix:
- Cracked brickwork or render that needs a builder or plasterer
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
How it works
When we arrive, we start by going over the job with you, so there are no surprises. 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. In a small place like Hunt's Green, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us if parking is tricky
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Ask for a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Hunt's Green questions
Is Hunt's Green within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Great Missenden station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
How long does the job take?
That depends on the amount of work, but as a guide it takes anything from a few hours to several days, depending on the building. We will give you a better idea when we quote.
Can you reach joints on upper floors?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we’ll confirm the access.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before resealing.
What colours does the sealant come in?
The sealant colour is picked to suit the wall so the joint blends in. There’s a wide choice of exterior colours.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Hunt's Green buildings and the weather
Historic houses like Cholesbury Manor House (about 2.9 miles north-east) are a reminder that the area around Hunt's Green has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Lee Common Church of England School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you live in an older home near Old Church of St John the Baptist, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Hunt's Green is about 4 miles west of Chesham, in Buckinghamshire. Wherever you are in the HP16 postcode area, we cover external mastic for homes and businesses. Hunt's Green is one of 263 towns and villages in Buckinghamshire where we work for external mastic. You can also see our page for Reading, about 22 miles away.
Postcode districts we cover here for external mastic: HP16. We also cover Lee Gate (1 mile north), Kingsash (1 mile north-west), Wendover Dean (1 mile north-west), Great Missenden (2 miles south) and Great Hampden (3 miles south-west). Within a short drive, we also cover Aylesbury (8 miles north-west), High Wycombe (7 miles south), Chesham (4 miles east), Marlow (11 miles south), Amersham (5 miles south-east) and Beaconsfield (8 miles south).
Local landmarks in Hunt's Green
We work in homes and buildings around Misbourne School and Cock and Rabbit pub and the streets around them. The nearest railway station is Great Missenden station, roughly 1.5 miles south. Nearby you will also find Roald Dahl Museum and Story Centre (1.6 miles south) and Chiltern Hospital (2.4 miles south). Open spaces near Hunt's Green include Sands Bank and Haddington Hill.
Signs you need external mastic in Hunt's Green
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.
If you can see any of these, it’s time to have the joints looked at:
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Sealant pulling away from one side of the joint
For landlords with property near Great Missenden station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- How the colour is chosen
- How the surfaces are prepared before sealing
- Is VAT in the price?
- How hidden problems are handled
Why it’s worth doing now in Hunt's Green
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. Around Hunt's Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why choose Mr Mastic in Hunt's Green
- Rated 4.9 stars on Google
- Experience in homes, commercial sites and hotels
- 12-month guarantee on every job
- 20+ years of sealant experience
Landlords, agents and businesses in Hunt's Green
Letting agents often deal with us directly. Tell us the address, the job and how access works.
For anyone letting property in or around Hunt's Green, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Aftercare tips
After the cure time, these simple habits help:
- Look over the joints every year, ideally after winter
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.