West Sussex · England
Midhurst External Mastic
Our applicators work in Midhurst on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Plants rooting in failed movement joints
- Panel joints letting water in
- Joints with sealant missing in places
External mastic for homes and businesses in Midhurst
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We work on concrete & block, brickwork movement joints and façade panels, and people most often call us about damp patches traced to an open external joint and joints pointed up with cement by mistake.
In and around Midhurst, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
You get a 12-month guarantee, the same in Midhurst as everywhere else we work.
- Location
- Midhurst (GU29)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Common problems we fix in Midhurst
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
Common reasons people contact us include:
- Panel joints letting water in
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
- Weeds or debris growing in open joints
Homes close to Roman Catholic Church of Divine Motherhood include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Before you book anyone
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
- How long the guarantee is
- What happens if they find a problem under the old sealant
The process
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. For a job in Midhurst, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
Getting a quote
Want a quote for external mastic? Please call 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
Midhurst buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Cowdray House (about 0.6 miles north-east) are a reminder that the area around Midhurst has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like Midhurst CofE Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Midhurst is about 8 miles east of Petersfield, in West Sussex. We provide external mastic to homeowners, landlords and businesses in Midhurst and the surrounding area, as part of our work across West Sussex. Midhurst is one of 371 towns and villages in West Sussex we cover for external mastic. Portsmouth is on our list too, around 19 miles away.
Postcode districts we cover here for external mastic: GU29. Local streets include Station Road, Edinburgh Square and Pretoria Avenue, all of which we cover. You’ll find Midhurst on the A272 and A286, which makes it straightforward to reach with everything needed for external mastic. Other places close to Midhurst include Bepton Common (1 mile south-west), West Lavington (1 mile east), Cocking Causeway (1 mile south), Easebourne (1 mile north-east) and Woolbeding (1 mile north-west). Further out, we also cover Bognor Regis (14 miles south), Chichester (10 miles south), Littlehampton (15 miles south-east), Emsworth (12 miles south-west), Storrington (14 miles east) and Billingshurst (13 miles east).
Near you in Midhurst
Around Midhurst, our work takes us to homes and buildings near The Egmont Public House, Midhurst Rother College and St Margaret's Convent and the streets around them. Other landmarks nearby include Midhurst Community Hospital (0.8 miles north-east) and Lodsworth Castle (3.2 miles east). Green spaces nearby include Levin Down and Iping and Stedham Commons.
Surface by surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
What happens if it’s left?
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Homes in smaller places like Midhurst can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and send you a clear quote before work begins.
Why us?
- We never seal over old sealant
- We leave the area clean and tidy
- Fully insured
- Anti-fungal silicone where joints get wet
What affects the quote in Midhurst
We quote each job individually. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- The size of the job
- When we can work, for business premises
- Whether there’s mould to deal with
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What we need to know
When you contact us, these details help:
- The rough size of the job
- The type of property
- Where the property is
- Any access issues, like height or stairs
We quote each job on its own. Simply phone 0345 464 0079 or email us and describe the job and send photos if you have them.
Towns and villages near Midhurst
Also in Midhurst
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Get split or bare joints resealed while the damage is small
- Make sure movement joints are not pointed over
- Walk round the building once a year and look at the joints
- Keep high-pressure jets off the joints
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.
Common questions in Midhurst
Is external mastic in Midhurst guaranteed?
All our work, in Midhurst and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Will you come out to Midhurst?
Yes, Midhurst is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
How long does external mastic last?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
How long will you be here?
That depends on how much there is to do, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll give you a better idea when we quote.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Will the old sealant be removed?
Yes. 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. Domestic, commercial and hotel work are all part of what we do.
How do I get a quote for external mastic in Midhurst?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or email us with a short description of the job.