Oxfordshire · England
External Mastic in Great Haseley
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Great Haseley and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
Common questions in Great Haseley
What guarantee comes with external mastic in Great Haseley?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in Great Haseley?
Yes. We work across London and the South East, and Great Haseley is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or send us an email.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so the joint does not draw the eye.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
How we handle external mastic in Great Haseley
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint doesn’t stand out. Common call-outs are for damp patches traced to an open external joint and old sealant gone brittle and cracked, across joints between brick and frames, façade panels and copings & trims.
In a village or hamlet like Great Haseley, 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.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Great Haseley (OX44)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
External mastic in Great Haseley: local notes
With historic houses such as Garsington Manor (about 3.5 miles west) nearby, there’s older building stock in the area around Great Haseley as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Peter, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Great Haseley is about 5 miles south-west of Thame, in Oxfordshire. Whether you’re in the middle of Great Haseley or further out, we cover external mastic for every kind of property. Our Oxfordshire coverage runs to 443 places, Great Haseley among them. Oxford is on our list too, about 7 miles from Great Haseley.
Here we cover the OX44 postcode area for external mastic. Whether your property is on Rectory Road, Horse Close Cottages and Back Way or a nearby road, we can help. Neighbouring places we cover for external mastic include Great Milton (1 mile north-west), Milton Common (1 mile north-east), Tiddington (2 miles north), Albury (2 miles north-east) and Draycott (3 miles north). Within a short drive, we also cover Oxford (7 miles west), Didcot (10 miles south-west), Bicester (14 miles north), Abingdon-on-Thames (9 miles west), Thame (5 miles north-east) and Henley-on-Thames (14 miles south-east).
Local landmarks in Great Haseley
Locally, jobs take us to homes and businesses close to The Plough Inn, among other places. A little further out are Thame Community Hospital (5.1 miles north-east) and Waterperry Gardens Rural Museum (2.8 miles north). The countryside around Great Haseley includes Wells Farm.
Keeping the joints in good condition
Looking after new joints is easy:
- Never let anyone fill a movement joint with mortar
- Keep high-pressure jets off the joints
- Keep soil, plants and ivy away from the joints
- Keep water from gutters off the wall
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Nearby places to Great Haseley
Also in Great Haseley
When to call us in Great Haseley
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
It’s worth asking for a quote if you see:
- Weathered mastic that no longer stretches
- Joints pointed up with cement by mistake
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
If you look after a building such as Great Milton Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- What insurance they hold
- The length of the guarantee
What we do, step by step
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the building. In a small place like Great Haseley, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
Ask for a quote
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Read more
Surface by surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Should I try it myself first?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What affects the quote in Great Haseley
You’ll get a clear quote before any work starts. It’s based on:
- How much there is to do
- Whether the work is at height
- Mould in or behind the old joints
- How many areas need sealing
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us.
What to tell us for a quote
When you contact us, it’s useful to know:
- Where the property is
- Roughly how big the job is
- A few pictures by email, if you can
- The type of property
If you’re in Great Haseley and need external mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Landlords, agents and businesses in Great Haseley
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.