West Sussex · England
Scaynes Hill External Mastic
External mastic for Scaynes Hill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
- Movement joints with cracked, split or missing sealant
External mastic in Scaynes Hill
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. Common call-outs are for hard, crazed mastic that has stopped moving and cracked joints where brick meets render or frames, on render & cladding joints, copings & trims and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Scaynes Hill is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Each job carries a 12-month guarantee.
- Place
- Scaynes Hill (RH17)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
What we can’t put right
Sealant is not the answer to every problem, and we’ll tell you before work begins. Sealant won’t put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Walls that need new movement joints cut into them
- Cracks in the bricks or render themselves, away from the joints
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
Also near Scaynes Hill
More services for Scaynes Hill
How we quote for external mastic
Jobs vary more than people expect. The main factors:
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- How much there is to do
- Whether the work is at height
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
What to tell us for a quote
To make quoting easier, please include:
- If someone has resealed it before
- The type of property
- A few pictures by email, if you can
- The address or postcode of the job
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Scaynes Hill questions
Is Scaynes Hill in your area for external mastic?
Yes, Scaynes Hill is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
I let a flat near Haywards Heath station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
How long does the job take?
Most jobs take anything from a few hours to several days, depending on the building. We’ll confirm how long when we quote.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Will the new joint stand out?
The sealant colour is picked to suit the wall. Exterior sealants come in a good range of colours.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Scaynes Hill buildings and the weather
With historic houses such as Ockenden Manor (about 4.1 miles west) nearby, there’s older building stock in the area around Scaynes Hill as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Haywards Heath station, split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as St Augustine's CofE Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Scaynes Hill is about 2 miles east of Haywards Heath, in West Sussex. If you need external mastic in Scaynes Hill, please phone 0345 464 0079 or email us for a quick quote. We cover West Sussex from our Crawley base, Scaynes Hill included. 371 places in West Sussex are on our list. We also work in Crawley, about 10 miles from Scaynes Hill.
Here we cover the RH17 postcode area for external mastic. That includes homes and businesses on Church Road, Lewes Road and Orchard Close. Neighbouring places we cover for external mastic include Haywards Heath (2 miles west), North Chailey (2 miles south-east), Wivelsfield Green (2 miles south), Wivelsfield (2 miles south-west) and Chailey (3 miles south-east). Within a short drive, we also cover Crawley (10 miles north-west), Horsham (13 miles north-west), Burgess Hill (4 miles south-west), East Grinstead (10 miles north), Shoreham-by-Sea (14 miles south-west) and Broadfield (10 miles north-west).
Landmarks near Scaynes Hill
Typical jobs here are in homes near Oathall Community College, The Farmers pub and Great Walstead School, among other places. For rail, the closest station is Haywards Heath station, about 2.4 miles west. A little further out are Princess Royal Hospital (1.6 miles west) and Parish Museum (2 miles north-west). For a walk, there’s Ashenground and Bolnore Woods.
Aftercare tips
A little care helps the new joints last. Our advice:
- Keep soil, plants and ivy away from the joints
- Leave the joints unpainted unless we have said otherwise
- Deal with leaking gutters that soak the joints below
- Walk round the building once a year and look at the joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
The process
Once we’re 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. In a small place like Scaynes Hill, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
Getting a quote
If you are in Scaynes Hill and need external mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Advice
Common problems we fix in Scaynes Hill
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
If you live in an older home near Church of St Augustine of Canterbury, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- Which colour the sealant will be
- What the quote includes, VAT included or not
- What happens if they find a problem under the old sealant
- How the surfaces are prepared before sealing