West Sussex · England
External Mastic in Sidlesham Common
We cover Sidlesham Common for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Failed seals between different materials
External mastic in Sidlesham Common, done properly
On houses, flats and commercial buildings across Sidlesham Common, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you have joints where the bead has come unstuck and rigid filler in a joint that should flex, we can help, whatever the surface.
External sealant needs dry, clean surfaces, so work around Sidlesham Common is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Sidlesham Common (PO20)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
The work is kept neat and contained to the area we are working on, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. Somewhere like Sidlesham Common needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at every joint and agree a colour to suit the wall.
- 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
- Mention any sign-in or site rules at work premises
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
Get a quote
Want a quote for external mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
Advice
Outside joints around Sidlesham Common
Sidlesham Common is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces 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.
If you live in an older home near St Mary Our Lady Sidlesham, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Sidlesham Common is about 3 miles south of Chichester, in West Sussex. Wherever you are in the PO20 postcode area, our applicators can take on external mastic. Our area takes in 371 places across West Sussex, large and small. Portsmouth is on our list too, around 12 miles away.
Postcode districts we cover here for external mastic: PO20. External mastic is available to properties on Chichester Road and Jury Lane and the roads around them. Close by, we work in Street End (1 mile south-east), Sidlesham (1 mile south), Fisher (1 mile east), Keynor Estate (2 miles south) and South Mundham (2 miles east). We also work in nearby towns such as Bognor Regis (5 miles east), Chichester (3 miles north), Selsey (4 miles south), Littlehampton (12 miles east), Emsworth (7 miles north-west) and Rustington (13 miles east).
Around Sidlesham Common
In Sidlesham Common, that means homes and buildings near The Blacksmith's Arms Public House and the streets around them. Sidlesham Common’s nearest station is Chichester station, roughly 2.6 miles north of the centre. Nearby you’ll also find Chichester Cathedral Treasury (2.9 miles north) and Chichester Castle (3.2 miles north). For a walk, there’s Nutborne Marshes.
What sealant work cannot fix
Before you book, it’s worth knowing the limits:
- Rising or penetrating damp from elsewhere in the wall
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Common problems we fix in Sidlesham Common
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
These are the problems we are asked about most:
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Failed seals between different materials
For landlords with property near Chichester station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Which sealant they’ll use, and why
- What the cure time is
- How much experience the applicator has
- What guarantee comes with the work
What affects the cost of external mastic
We do not publish a price list. What we look at:
- The size of the job
- Which sealant suits the joint
- Working hours on commercial sites
- Whether there’s mould to deal with
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
What we need to know
When you contact us, these details help:
- The type of property
- Roughly how big the job is
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Why deal with it now?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Where a wall is exposed, as many are in small places like Sidlesham Common, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why book with us
- Homes, businesses and hotels
- Anti-fungal sanitary silicone in wet areas
- Over 20 years’ experience
- We are fully insured
Take a look at what affects the cost and customer reviews.
FAQs for Sidlesham Common
Do you cover smaller places like Sidlesham Common?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Chichester station?
Yes. We work for letting agents and landlords as well as homeowners. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
How long does the job take?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. We’ll confirm how long when we quote.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
What do you need from me for a quote?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away and have them redone then.
Places near Sidlesham Common
What else we do in Sidlesham Common
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Check external joints each spring
- Show decorators and builders where the movement joints are
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.