West Sussex · England
Waterbeach External Mastic
External mastic in Waterbeach from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
- Movement joints with cracked, split or missing sealant
Surface by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Tell us what the building has when you get in touch.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap and keep the sealant to the right depth.
About our external mastic in Waterbeach
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. Common call-outs are for gaps where render, brick and frames meet and movement joints filled with mortar instead of sealant, on façade panels, render & cladding joints and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Waterbeach is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Waterbeach (PO18)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Waterbeach
Also in Waterbeach
Waterbeach buildings and the weather
With historic houses such as Goodwood House (about 0.5 miles north-west) nearby, there’s older building stock in the area around Waterbeach as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Boxgrove CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Chichester station, split movement joints are easy to miss on a rental until damp shows inside.
Waterbeach is about 3 miles north-east of Chichester, in West Sussex. We carry out external mastic for homeowners, landlords and businesses in Waterbeach, as part of our work across West Sussex. We cover 371 towns and villages across West Sussex, large and small. Our Portsmouth page covers work nearby, about 16 miles away.
We work across the PO18 postcode area for external mastic and the streets around it. Neighbouring places we cover for external mastic include Strettington (1 mile south), Westerton (1 mile south-west), Halnaker (1 mile east), Boxgrove (1 mile south-east) and Maudlin (1 mile south). Further out, we also cover Worthing (15 miles east), Bognor Regis (6 miles south), Chichester (3 miles south-west), Selsey (9 miles south), Littlehampton (10 miles south-east) and Emsworth (9 miles west).
What’s near Waterbeach
Waterbeach’s nearest station is Chichester station, roughly 3.2 miles south-west of the centre. Nearby you’ll also find Chichester Castle (2.6 miles south-west) and The Chichester City Museum (2.7 miles south-west). Green spaces nearby include Levin Down and Kingley Vale National Nature Reserve.
How the visit works
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. The work generally takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Waterbeach, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Clear the area around the work
Ask for a quote
For external mastic in Waterbeach, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Related advice
Looking after it afterwards
After the cure time, these simple habits help:
- Clear growth from the base of walls and joints
- Keep movement joints as flexible joints, not mortar
- Act on the first splits you see
- Avoid pressure-washing directly into sealant joints
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you’re 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 fails, we can still redo it.
Your questions about external mastic in Waterbeach
Do you cover Waterbeach for external mastic?
Yes, Waterbeach is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
Do you cover smaller places like Waterbeach?
Yes. Waterbeach 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.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Do you remove the old sealant?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
How much does external mastic cost in Waterbeach?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
Honest limits
New sealant can’t fix everything, and we’ll tell you before work begins. It won’t solve:
- Render that is blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
- Damp that isn’t coming from the joint
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
Signs you need external mastic in Waterbeach
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint can’t move, so the wall cracks somewhere else instead.
Any of these means the joints need attention:
- Movement joints with cracked, split or missing sealant
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
Homes close to The Priory Church of St Mary and St Blaize include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Comparing quotes
- What happens if the job turns out different
- How long to leave it before use
- What guarantee comes with the work
- How much experience the applicator has
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. In a small place like Waterbeach, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
Why book with us
- Over 20 years’ experience
- White, clear, grey or coloured to suit, where the product allows
- Quality sealants from Arbo and Everbuild
- We leave the area clean and tidy
Take a look at our cost guide and customer reviews.