Oxfordshire · England
External & façade joints in Farnborough, Oxfordshire
Problem with your movement joints in Farnborough? We cut out the old, prepare the joints and apply the right sealant.
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
External mastic for homes and businesses in Farnborough
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 line blends in. We work on brickwork movement joints, render & cladding joints and copings & trims, and people most often call us about damp patches traced to an open external joint and failed sealant between panels on a façade.
In a village or hamlet like Farnborough, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Farnborough (OX12)
- Region
- Oxfordshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Farnborough
Is external mastic in Farnborough guaranteed?
All our work, in Farnborough and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you cover smaller places like Farnborough?
Yes. Farnborough 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 work for letting agents?
Yes. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep soil, plants and ivy away from the joints
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
- Make sure movement joints aren’t pointed over
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
When to call us in Farnborough
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall and make things worse.
People usually contact us after spotting one of these:
- Rigid filler in a joint that should flex
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
In and around Farnborough, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- Are they insured?
- What product goes in the joint
- What happens if they find a problem under the old sealant
- Who turns up on the day
Walls and rooflines in Farnborough
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.
Homes close to Church of All Saints include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Farnborough is about 4 miles south-east of Wantage, in Oxfordshire. Whether you’re in the middle of Farnborough or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Farnborough is one of 443 places in Oxfordshire where we work for external mastic. There’s also a page for Oxford, roughly 16 miles from Farnborough.
Work in OX12 is quoted and booked the same way as anywhere else. We also cover Catmore (2 miles south-east), Brightwalton (2 miles south), Brightwalton Green (2 miles south), West Ilsley (3 miles east) and Stanmore (3 miles south-east). Within a short drive, we also cover Didcot (8 miles north-east), Abingdon-on-Thames (11 miles north), Wantage (4 miles north-west), Grove (6 miles north-west), Faringdon (12 miles north-west) and Benson (13 miles north-east).
Local landmarks in Farnborough
Well-known places in the area include Atlas Computer Laboratory (3.8 miles north-east). The countryside around Farnborough includes Letcombe Valley and Chain Hill.
How the job changes by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant isn’t too deep.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The number and length of the joints
- Any mould that needs treating
- Access and height
- How many areas need sealing
Combining jobs into one visit is generally more efficient than separate visits. We’ll send you a clear quote for the lot.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- The problem you’ve noticed
- Where the job is, and your postcode
- Any previous sealing or DIY work
- Roughly how big the job is
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building. Somewhere as small as Farnborough, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
How to prepare
- Tell us about any water getting in
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
How to get a quote
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear price before we start.