West Sussex · England
Thakeham External Mastic
We cover Thakeham for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Gaps where render, brick and frames meet
- Rain getting behind render or cladding at a joint
- Movement joints filled with mortar instead of sealant
Do you need external mastic in Thakeham?
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Signs it’s time to call us include:
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
- Old sealant gone brittle and cracked
Schools such as Rydon Community College are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- Is VAT in the price?
External mastic in Thakeham, done properly
Short cuts in external joints show up within a season or two. 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 concrete & block, render & cladding joints and joints between brick and frames, and people most often call us about old sealant gone brittle and cracked and sealant pulling away from one side of the joint.
Outside joints can only be sealed when they’re dry, so work in Thakeham is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Place
- Thakeham (RH20)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for external mastic
Your quote is based on your job. We look at:
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- How many rooms, windows or areas are involved
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Roughly how big the job is
- The problem you’ve noticed
- Where the job is, and your postcode
- Whether it has been sealed before
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Thakeham: your questions answered
I let a flat near Pulborough station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is Thakeham within the area you cover?
Yes, Thakeham is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
How long does the job take?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including the preparation. We’ll confirm how long when we quote.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
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.
Housing providers, facilities teams and property managers book us too in Thakeham and across West Sussex. Several sites can be quoted together.
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
What external mastic looks like in Thakeham
With historic houses such as Parham House (about 3.6 miles south-west) nearby, there’s older building stock in the area around Thakeham as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as The Parish Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. If you let a flat or house near Pulborough station, outside joints that have cracked can let damp into a rental, so check them between lets.
Thakeham is about 8 miles north of Worthing, in West Sussex. Anywhere in RH20, we cover external mastic for homes and businesses. 371 places in West Sussex are on our list. There’s also a page for Crawley, about 15 miles away.
All of RH20 is within our area for external mastic. Whether your property is on The Street, Bramble Lane and Cray's Lane or anywhere close by, we can help. Other places close to Thakeham include Abingworth (1 mile south-west), Warminghurst (1 mile south-east), Goose Green (1 mile north-east), West Chiltington (1 mile north-west) and Heath Common (1 mile south). We also work in nearby towns such as Crawley (15 miles north-east), Horsham (9 miles north-east), Worthing (8 miles south), Haywards Heath (15 miles east), Burgess Hill (13 miles east) and Littlehampton (10 miles south-west).
Near you in Thakeham
The nearest railway station is Pulborough station, about 4.1 miles west. Other landmarks nearby include The Storrington And District Museum (2.2 miles south-west). Green spaces nearby include Knepp Wildland and Chanctonbury Hill.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How the visit works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Thakeham, 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.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Tell us about any water getting in
Get a quote
If you are in Thakeham and need external mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Read more
Towns and villages near Thakeham
What else we do in Thakeham
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Get split or bare joints resealed while the damage is small
- Check external joints each spring
- Ask before painting over external sealant
- Keep high-pressure jets off the joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.