Surrey · England
Nalderswood External Mastic
Problem with your movement joints in Nalderswood? We remove the old material, prepare the joints and seal them properly.
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Don’t let climbing plants root in the sealant
- Get split or bare joints resealed while the damage is small
- Avoid pressure-washing directly into sealant joints
- Check the sealant is paintable before painting near it
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
External mastic in Nalderswood, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. We work on render & cladding joints, brickwork movement joints and joints between brick and frames, and common reasons people get in touch are failed sealant between panels on a façade and moss and dirt in joints with no sealant left.
External sealant needs dry, clean surfaces, so work around Nalderswood is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Nalderswood (RH2)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Nalderswood: your questions answered
Can you do external mastic in Nalderswood?
Yes. We work across London and the South East, and Nalderswood is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Nalderswood?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Why do you put foam in the joint first?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
Where are you based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What information do you need?
Let us know what needs doing and where. We will ask anything else we need to know.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
When something else is needed
We will not take on work that will not last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Brickwork movement joints
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
Why act early in Nalderswood
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Where a wall is exposed, as many are in small places like Nalderswood, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Why Nalderswood customers choose us
- Approved under the ARBOMaster scheme
- Sanitary silicone with an anti-fungal additive in wet areas
- You choose the colour before work begins
- More than 20 years in sealant work
Take a look at what affects the cost and what customers say.
When to call us in Nalderswood
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
These are the problems we are asked about most:
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
- Rain getting behind render or cladding at a joint
In the older streets around Church of St Bartholomew, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before you book
- Who turns up on the day
- Whether they’re fully insured
- Whether the sealant suits the joint
- How long the guarantee is
Quotes for external mastic in Nalderswood
We don’t publish a price list. The quote depends on:
- Any mould that needs treating
- The product the joint needs
- Any working-time requirements on site
- The size of the job
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
Photos by email are helpful but not essential. Please mention:
- Where the job is, and your postcode
- The rough size of the job
- Whether it’s a home or a business
- Pictures of the joints, sent by email
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
How the visit works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Somewhere as small as Nalderswood, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
If you’re in Nalderswood and need external mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Also near Nalderswood
Also in Nalderswood
What external mastic looks like in Nalderswood
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.
Rented homes near Salfords station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Burys Court School, larger buildings have long runs of movement joint that eventually need resealing.
Nalderswood is about 3 miles west of Horley, in Surrey. If you need external mastic in Nalderswood, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Surrey from our Crawley base, Nalderswood included. Our area takes in 395 places across Surrey, large and small. For nearby work, see our Crawley page, about 6 miles away.
Our applicators cover all of RH2 for external mastic and the streets around it. If you need external mastic at a property on Smalls Hill Road and Deanoak Lane or a nearby road, we can help. We also cover the places around Nalderswood: Norwood Hill (1 mile south-east), Shellwood Cross (1 mile west), Parkgate (2 miles south-west), Cudworth (2 miles south-west) and Charlwood (3 miles south). Larger places within reach include Guildford (15 miles west), Epsom (10 miles north), Horley (3 miles east), Redhill (4 miles north-east), Ewell (11 miles north) and Reigate (3 miles north-east).
Local landmarks in Nalderswood
Around Nalderswood, our work takes us to homes and buildings near Edolph's Copse. The nearest railway station is Salfords station, roughly 3.4 miles east of the centre. Well-known places in the area include Reigate Priory Museum (3.3 miles north-east) and East Surrey Hospital (3.7 miles north-east). The countryside around Nalderswood includes Reigate Heath and Colley Hill.
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.