West Sussex · England
External & façade joints in Graffham, West Sussex
External mastic for Graffham, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
How we handle external mastic in Graffham
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. We work on concrete & block, façade panels and joints between brick and frames, and people most often call us about rain getting behind render or cladding at a joint and joints pointed up with cement by mistake.
Outside joints can only be sealed when they’re dry, so work in Graffham is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Graffham (GU28)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for external mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- The size of the job
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
What we need to know
Photos by email are helpful but not essential. Please mention:
- Whether it has been sealed before
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Common questions in Graffham
Will you come out to Graffham?
Yes, Graffham is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Graffham in your area for external mastic?
Yes. Our work covers London and the South East, and Graffham is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Do you work for letting agents?
Yes, we do. We work in homes, commercial premises and hotels.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
How do I get a quote for external mastic in Graffham?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email and let us know what needs doing and where.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Common problems we fix in Graffham
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint.
Look out for any of the following:
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Rigid filler in a joint that should flex
- Failed sealant between panels on a façade
If you live in an older home near The Parish Church of St Giles, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before you book anyone
- What the cure time is
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
For landlords and businesses
Housing providers, facilities teams and property managers book us too in Graffham and across West Sussex. We can quote a run of properties together, and we’re fully insured for the work.
If you manage several properties in or around Graffham, several properties can be quoted together. Just tell us the addresses and what each one needs.
DIY versus a professional finish
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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
How the job changes by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod.
Nearby places to Graffham
Other services in Graffham
Aftercare tips
After the cure time, these simple habits help:
- Walk round the building once a year and look at the joints
- Point out the joints to other trades
- Keep water from gutters off the wall
- Act on the first splits you see
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal before water has had years to get in.
What happens on the day
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. For a village or hamlet like Graffham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Move anything stored near the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
How to get a quote
Asking for a quote is easy: 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 take it from there.
Advice
Outside joints around Graffham
Historic houses like Cowdray House (about 3.5 miles north-west) are a reminder that the area around Graffham has older buildings as well as new. Where a home is older, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Graffham CofE Infant School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Graffham is about 9 miles north-east of Chichester, in West Sussex. We provide external mastic to homes and businesses in Graffham and the surrounding area, as part of our work across West Sussex. Graffham is one of 371 towns and villages in West Sussex where we work. For nearby work, see our Portsmouth page.
Postcode districts we cover here for external mastic: GU28. Whether your property is on Guillods Cottages and St Giles Place or anywhere close by, our applicators can take on the job. If you are just outside Graffham, we cover East Lavington (1 mile south-east), Duncton (2 miles east), Selham (2 miles north), South Ambersham (2 miles north) and Rotherbridge (3 miles north-east). Further out, we also cover Worthing (15 miles south-east), Bognor Regis (11 miles south), Chichester (9 miles south-west), Selsey (15 miles south), Littlehampton (11 miles south-east) and Emsworth (13 miles south-west).
Local landmarks in Graffham
Around Graffham, our work takes us to homes and buildings near The Woodman pub, among other places. Well-known places in the area include Coultershaw Heritage Site (3.1 miles north-east) and Midhurst Community Hospital (3.9 miles north-west). For a walk, there’s Levin Down and Graffham Common.