Buckinghamshire · England
Widmer End External Mastic
External mastic for Widmer End, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
How we handle external mastic in Widmer End
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. Common call-outs are for water getting into walls through failed joints and brick movement joints where the sealant has split, across joints between brick and frames, brickwork movement joints and render & cladding joints.
Around Widmer End, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Whatever the size of the job, it’s backed by our 12-month guarantee in Widmer End and across Buckinghamshire.
- Place
- Widmer End (HP15)
- Region
- Buckinghamshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What external mastic looks like in Widmer End
Historic houses like Hughenden Manor (about 1.9 miles south-west) are a reminder that the area around Widmer End has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of the Good Shepherd, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near High Wycombe station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Widmer End is about 3 miles north-east of High Wycombe, in Buckinghamshire. We carry out external mastic for homes and businesses in Widmer End. Widmer End is one of 263 places in Buckinghamshire where we work for external mastic. We also work in Reading, around 19 miles away.
Our applicators cover all of HP15 for external mastic. You’ll find streets such as Haines Road, George's Hill and Primrose Green, and we cover them all. We also cover the places around Widmer End: Spurlands End (1 mile north-east), Cryers Hill (1 mile west), Great Kingshill (1 mile north-west), Four Ashes (1 mile south-west) and Hazlemere (1 mile south-east). Within a short drive, we also cover Aylesbury (11 miles north), High Wycombe (3 miles south-west), Chesham (6 miles north-east), Marlow (7 miles south), Amersham (5 miles east) and Beaconsfield (5 miles south-east).
Landmarks near Widmer End
In Widmer End, that means homes and buildings near Pipers Corner School, Holmer Green Senior School and The White Lion pub, among other places. For rail, the closest station is High Wycombe station, roughly 2.6 miles south-west of the centre. Other landmarks nearby include High Wycombe Castle (2.6 miles south-west) and Roald Dahl Museum and Story Centre (2.7 miles north). The countryside around Widmer End includes Prestwood Local Nature Reserve.
Towns and villages near Widmer End
Other services in Widmer End
FAQs for Widmer End
Do you work for landlords with property near High Wycombe station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Do you cover Widmer End for external mastic?
Yes, Widmer End is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Are you insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
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.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months, large or small.
Do you work at height?
It depends on the building. Send us photos and a rough idea of the height and we’ll confirm how they can be reached safely.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
How long does external mastic take?
Most jobs take anything from a few hours to several days, depending on the building. Your quote will say how long we expect yours to take.
How we quote for external mastic
Call for a quick quote. What matters most is:
- The size of the job
- How many areas need sealing
- The product the joint needs
- Whether there’s mould to deal with
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
Before you ask for a quote, have a think about:
- The type of property
- The address or postcode of the job
- The problem you’ve noticed
- Photos by email, if that’s easy
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Honest limits
We will not take on work that won’t last, so these are the limits:
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
- Rising or penetrating damp from elsewhere in the wall
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Where we work in Widmer End
- Façade panels
- Render & cladding joints
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
Surface by surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
How it works
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. Somewhere like Widmer End needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details, and pictures are welcome.
Read more
Do you need external mastic in Widmer End?
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
People usually contact us after spotting one of these:
- Weeds or debris growing in open joints
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
- Cracked joints where brick meets render or frames
For site and facilities teams at buildings such as Widmer End Combined School, its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- Which sealant they’ll use, and why
- Whether they’re fully insured
- What the cure time is
- Whether you can choose the colour
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
If you manage several properties in or around Widmer End, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.