West Sussex · England
External & façade joints in Holbrook, West Sussex
Our applicators work in Holbrook on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
External mastic for homes and businesses in Holbrook
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. If you have movement joints with cracked, split or missing sealant and panel joints letting water in, we can help.
External sealant needs dry, clean surfaces, so work around Holbrook is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Place
- Holbrook (RH12)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Holbrook: your questions answered
Do you cover Holbrook for external mastic?
Yes. Our work covers London and the South East, and Holbrook is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Do you work for landlords with property near Warnham station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
How much does external mastic cost in Holbrook?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. A flexible sealant is the right fill.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
What happens on the day
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours to a few days, depending on the length of joint and the access. In a small place like Holbrook, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Places near Holbrook
Other services in Holbrook
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What external mastic looks like in Holbrook
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.
For site and facilities teams at buildings such as Holbrook Primary School, its movement joints, gutters and trims need looking after like any other building’s. In the older streets around St. Mark's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Holbrook is about 2 miles north of Horsham, in West Sussex. From the centre of Holbrook to the outskirts, we cover external mastic for every kind of property. Our West Sussex coverage runs to 371 places, and Holbrook is one of them.
Here we cover the RH12 postcode area for external mastic. If you’re just outside Holbrook, we cover Warnham (2 miles west), Horsham (2 miles south), Broadbridge Heath (3 miles south-west), Tower Hill (3 miles south-west) and Rowhook (4 miles west). Further out, we also cover Crawley (5 miles east), Haywards Heath (11 miles south-east), Burgess Hill (12 miles south-east), East Grinstead (13 miles east), Broadfield (4 miles east) and Storrington (13 miles south-west).
Landmarks near Holbrook
We work in homes and buildings around Greenway Academy and Warnham Park and the streets around them. The closest station to Holbrook is Warnham station, roughly 0.8 miles west. Well-known places in the area include Horsham Hospital (1.7 miles south-west). Green spaces nearby include Warnham LNR and Vann Lake.
Signs you need external mastic in Holbrook
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
These are the problems we’re asked about most:
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
- Movement joints with cracked, split or missing sealant
For landlords with property near Warnham station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- Whether all the old sealant comes out first
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- How hidden problems are handled
Should I try it myself first?
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.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Where a wall is exposed, as many are in small places like Holbrook, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
Why Holbrook clients choose us
- Rated 4.9 stars on Google
- Tidy, careful work
- White, clear, grey or coloured to suit, where the product allows
- Sealant colour chosen to suit
See our cost guide and our reviews.
Surface by surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Point out the joints to other trades
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
- Keep soil, plants and ivy away from the joints
Do not paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.