Surrey · England
External Mastic in Smallfield
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Smallfield. Fully insured, ARBOMaster approved and guaranteed for a year.
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
- Gaps where render, brick and frames meet
External mastic for homes and businesses in Smallfield
For buildings in Smallfield, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We are often asked to deal with joints with sealant missing in places and failed seals between different materials, across copings & trims, brickwork movement joints and concrete & block.
Homes around Smallfield range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
There’s a 12-month guarantee on every job, large or small.
- Location
- Smallfield (RH6)
- Wider area
- Surrey
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Smallfield
Sealing over the top of old mastic doesn’t hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. In an older home around Smallfield, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Why choose Mr Mastic in Smallfield
- We leave the area clean and tidy
- Sealant colour chosen to suit
- Anti-fungal sanitary silicone in wet areas
- Approved under the ARBOMaster scheme
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What happens on the day
At the end, we look at the finished work together. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. For a job in Smallfield, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Get a quote
For external mastic in Smallfield, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
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FAQs for Smallfield
Do you work for landlords with property near Horley station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is Smallfield within the area you cover?
Yes. Smallfield is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
How do you reach high-level joints?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What we cannot put right
In fairness, some problems need a different trade:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Loose or hollow render, which needs re-rendering
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Smallfield
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Façade panels
Also near Smallfield
Other services in Smallfield
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Show decorators and builders where the movement joints are
- Clear growth from the base of walls and joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- Whether the work is at height
- Mould in or behind the old joints
- The product the joint needs
- How much old sealant there is and how hard it is to remove
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Roughly how big the job is
- A few photos by email, if you can
- The address or postcode of the job
- How we’d reach the joints
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, and add photos by email if you can.
Outside joints around Smallfield
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Horley station? Then split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as Burstow Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Smallfield is about 2 miles east of Horley, in Surrey. Jobs in Smallfield get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 395 places in Surrey are on our list, large and small.
We work across the RH6 postcode area for external mastic. You will find streets such as Churchill Road, Orchard Road and Tudor Close, and we cover them all. We also cover the places around Smallfield: Outwood (1 mile north), Burstow (1 mile south-west), Keeper's Corner (1 mile south), Fernhill (2 miles south-west) and Shipley Bridge (2 miles south-west). Larger places within reach include Epsom (13 miles north-west), Redhill (5 miles north-west), Ewell (14 miles north-west), Reigate (6 miles north-west), Caterham (8 miles north) and Dorking (10 miles north-west).
Landmarks near Smallfield
Typical jobs here are in homes near Oakwood School and Plough and Furrow pub and the streets around them. The nearest railway station is Horley station, about 2 miles west. Other landmarks nearby include Bletchingley Castle (4.5 miles north) and Effingham Park Motor Museum (2.5 miles south-east). Open spaces near Smallfield include Hedgecourt Lake.