Buckinghamshire · England
External Mastic in Holly Green
Sealing brickwork movement joints, render, cladding and façade joints in Holly Green, with a one-year guarantee on every job. Ask us for a quote.
- Weathered mastic that no longer stretches
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Keep soil, plants and ivy away from the joints
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
- Get split or bare joints resealed while the damage is small
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal before water has had years to get in.
About our external mastic in Holly Green
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We work on joints between brick and frames, render & cladding joints and concrete & block, and the jobs we see most are sealant pulling away from one side of the joint and hard, crazed mastic that has stopped moving.
In a village or hamlet like Holly Green, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
Big or small, it’s backed by our one-year guarantee in Holly Green and across Buckinghamshire.
- Where
- Holly Green (HP27)
- Wider area
- Buckinghamshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we can’t put right
In fairness, some problems need a different trade:
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Loose or hollow render, which needs re-rendering
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Façade panels
Landlord and commercial work in Holly Green
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
We also work for property managers and facilities teams. Several sites can be quoted together, and we’re fully insured.
How it works
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Holly Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
Ask for a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Read more
Common problems we fix in Holly Green
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Common reasons people contact us are:
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
For landlords with property near Princes Risborough station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- What the quote includes, VAT included or not
- Are they insured?
- Who does the work, and how experienced they are
- What the cure time is
Towns and villages near Holly Green
More services for Holly Green
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. In a small place like Holly Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Holly Green customers choose us
- A choice of colours where the product allows
- Anti-fungal sanitary silicone in wet areas
- Sealant colour chosen to suit
- Experience in homes, commercial sites and hotels
Read our cost guide or what customers say.
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Outside joints around Holly Green
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.
If you live in an older home near Church of the Holy Trinity, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Schools such as Princes Risborough School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Holly Green is about 4 miles east of Thame, in Buckinghamshire. From the centre of Holly Green to the outskirts, we cover external mastic for every kind of property. Across Buckinghamshire, we cover 263 places, and Holly Green is one of them. There’s also a page for Oxford, about 15 miles away.
All of HP27 is within our area for external mastic. We also cover Pitch Green (1 mile south-east), Skittle Green (1 mile south), Forty Green (1 mile west), Henton (1 mile south-west) and Bledlow (1 mile south-east). Further out, we also cover Aylesbury (7 miles north-east), High Wycombe (9 miles south-east), Chesham (12 miles east), Marlow (12 miles south-east), Amersham (13 miles east) and Beaconsfield (13 miles south-east).
Near you in Holly Green
In Holly Green, that means homes and buildings near The Peacock Country Inn, among other places. For rail, the closest station is Princes Risborough station, roughly 1.8 miles east of the centre. Well-known places in the area include Great Kimble Dial Hill (3.6 miles north-east) and Thame Community Hospital (3.9 miles west). The countryside around Holly Green includes Oakley Hill nature reserve and Beacon Hill.
Questions from Holly Green
Do you work for landlords with property near Princes Risborough station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can you do external mastic in Holly Green?
Yes. We work across London and the South East, and Holly Green is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
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.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.