Surrey · England
External Mastic in Cudworth
External mastic in Cudworth from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Failed seals between different materials
- Failed sealant between panels on a façade
- Rigid filler in a joint that should flex
How we handle external mastic in Cudworth
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. Typical jobs include plants rooting in failed movement joints and rigid filler in a joint that should flex, across concrete & block, copings & trims and joints between brick and frames.
In a village or hamlet like Cudworth, 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.
Our work is backed for twelve months, in Cudworth and everywhere else we cover.
- Where
- Cudworth (RH5)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Cudworth buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Newdigate CofE Endowed Aided Infant School? Then larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Holmwood station? Then split movement joints are easy to miss on a rental until damp shows inside.
Cudworth is about 4 miles west of Horley, in Surrey. Anywhere in RH5, our applicators can take on external mastic. Cudworth is one of 395 towns and villages in Surrey where we work.
Here we cover the RH5 postcode area for external mastic. Local streets include Cudworth Park, The Poplars and Burnt Oak Lane, and we cover them all. Close by, we work in Newdigate (1 mile west), Russ Hill (1 mile south-east), Parkgate (2 miles north), Charlwood (2 miles east) and Norwood Hill (2 miles north-east). Further out, we also cover Guildford (15 miles north-west), Epsom (12 miles north), Horley (4 miles east), Redhill (7 miles north-east), Ewell (13 miles north) and Reigate (6 miles north-east).
Landmarks near Cudworth
Typical jobs here are in homes near Newdigate Brickworks. The closest station to Cudworth is Holmwood station, roughly 2.8 miles north-west. Nearby you’ll also find Langley Green Hospital (3.8 miles south-east). Not far away are Vann Lake and Leith Hill.
Also near Cudworth
Other services in Cudworth
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
If you manage several properties in or around Cudworth, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep high-pressure jets off the joints
- Look over the joints every year, ideally after winter
- Deal with leaking gutters that soak the joints below
- Never let anyone fill a movement joint with mortar
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
When to call us in Cudworth
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Signs it’s time to call us include:
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
Homes close to Church of St Peter include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- What happens if they find a problem under the old sealant
- How long to leave it before use
- Are they insured?
- Whether they seal over old material or remove it
The process
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Cudworth 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.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
What the job involves on each surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one.
Quotes for external mastic in Cudworth
The price is agreed before any work begins. It takes into account:
- Any working-time requirements on site
- Mould in or behind the old joints
- Access and height
- How much there is to do
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- Roughly how big the job is
- The problem you’ve noticed
- Pictures of the joints, sent by email
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.
Common questions in Cudworth
Do you work for landlords with property near Holmwood station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Do you cover smaller places like Cudworth?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can a movement joint be filled with mortar?
No, not where the gap is a movement joint. Pointing it stops it working. We’ll reseal it with a flexible sealant.
Do you use backing rod?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away.
Can you quote for more than one area?
Of course. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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, then guaranteed for a year.