Buckinghamshire · England
Hedsor External Mastic
External mastic in Hedsor from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Movement joints with cracked, split or missing sealant
External mastic in Hedsor
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 so the joint does not stand out. We work on copings & trims, façade panels and joints between brick and frames, and common reasons people get in touch are water getting into walls through failed joints and movement joints filled with mortar instead of sealant.
In a village or hamlet like Hedsor, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Hedsor (HP10, SL8)
- Wider area
- Buckinghamshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
We will not take on work that won’t last, so these are the limits:
- Structural movement, which needs a surveyor or engineer
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Copings & trims
Outside joints around Hedsor
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. Historic houses like Cliveden (about 1.1 miles south) are a reminder that the area around Hedsor has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
In the older streets around Cores End United Reformed Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Bourne End station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Hedsor is about 3 miles south-west of Beaconsfield, in Buckinghamshire. Every kind of property in Hedsor is covered for external mastic. The work is guaranteed for a year. Hedsor is one of 263 towns and villages in Buckinghamshire where we work. There’s also a page for Reading, roughly 15 miles from Hedsor.
Our applicators cover all of the HP10 and SL8 postcode area for external mastic and the streets around it. That includes homes and businesses on Kiln Fields, Kiln Lane and Broad Lane. We also cover the places around Hedsor: Wooburn (1 mile north), Berghers Hill (1 mile north-east), Wooburn Common (1 mile north-east), Wooburn Green (2 miles north) and Littleworth Corner (2 miles south-east). Within a short drive, we also cover High Wycombe (5 miles north-west), Chesham (10 miles north), Marlow (4 miles west), Amersham (8 miles north-east), Beaconsfield (3 miles north-east) and Chalfont St Peter (6 miles east).
Near you in Hedsor
In Hedsor, that means homes and buildings near Chequers Inn and Wye Valley School and the streets around them. The nearest railway station is Bourne End station, about 1 mile west. Nearby you’ll also find High Wycombe Castle (4.7 miles north-west) and Marlow Community Hospital (3.6 miles west). Not far away are Warren Nature Reserve and Taplow Lake.
What happens on the day
We bring everything the job needs with us, so you don’t need to buy or prepare anything. Once we have agreed what’s being done, we protect the area and start. It normally takes anything from a few hours to several days, depending on the building. Somewhere like Hedsor needs a little journey planning: 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.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear quote.
Read more
What affects the quote in Hedsor
Your quote is based on your job. We look at:
- How many areas need sealing
- Working hours on commercial sites
- The size of the job
- Mould in or behind the old joints
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and send you a clear quote before work begins.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
Nearby places to Hedsor
Also in Hedsor
Hedsor questions
Do you work for landlords with property near Bourne End station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is Hedsor within the area you cover?
Yes. Hedsor is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Can you match the colour of my brickwork?
The sealant colour is picked to suit the wall. Exterior sealants come in a good range of colours.
Are you insured?
Yes. We’re fully insured.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Do you work at height?
Each building is different. Tell us the height, the number of joints and what’s below them.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Surface by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
What we are called out for in Hedsor
Some movement joints have been pointed up with mortar. The joint cannot move, so the wall cracks somewhere else instead.
If you can see any of these, it’s time to have the joints looked at:
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
If you look after a building such as St Paul's Church of England Combined School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before booking
- How much experience the applicator has
- What product goes in the joint
- How long to leave it before use
- How the colour is chosen
Landlord and commercial work in Hedsor
Landlords and agents in Hedsor can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
For anyone letting property in or around Hedsor, several properties can be quoted together. Just tell us the addresses and what each one needs.