West Sussex · England
Aldwick External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Aldwick and across West Sussex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
External mastic in Aldwick, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. We work on façade panels, copings & trims and concrete & block, and people most often call us about damp patches traced to an open external joint and movement joints filled with mortar instead of sealant.
Around Aldwick, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Aldwick (PO21)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Aldwick
Does living near the coast affect external mastic in Aldwick?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
I let a flat near Bognor Regis station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How long does the job take?
That depends on the amount of work, but as a guide it takes 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.
What is backing rod for?
That is backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Towns and villages near Aldwick
Other services in Aldwick
What we do, step by step
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. A visit to Aldwick is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Advice
Why act early in Aldwick
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. Homes in smaller places like Aldwick can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Sealant colour chosen to suit
- White, clear, grey or another colour, product permitting
- Colour agreed with you before any work starts
- 180+ five-star Google reviews
What external mastic looks like in Aldwick
Aldwick is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as St Richard’s Church, an extension built onto an older house moves differently, and the joint between them takes the strain. For site and facilities teams at buildings such as Nyewood CofE Junior School, larger buildings have long runs of movement joint that eventually need resealing.
Aldwick is about 1 mile south-west of Bognor Regis, in West Sussex. Whether you’re in the middle of Aldwick or further out, we cover external mastic for every kind of property. Aldwick is one of 371 places in West Sussex we cover. Our Portsmouth page covers work nearby (16 miles or so).
Work in PO21 is quoted and booked the same way as anywhere else. Whether your property is on Fish Lane, Dark Lane and West Avenue or anywhere close by, we can help. If you are just outside Aldwick, we cover Nyetimber (1 mile west), Pagham (2 miles south-west), South Mundham (2 miles north-west), Fisher (3 miles north-west) and Sidlesham (3 miles west). We also work in nearby towns such as Worthing (14 miles east), Chichester (5 miles north-west), Selsey (5 miles south-west), Littlehampton (8 miles east), Emsworth (11 miles north-west) and Rustington (9 miles east).
Near you in Aldwick
In Aldwick, that means homes and buildings near West Park, The Regis School and The Regis School, among other places. Aldwick’s nearest station is Bognor Regis station, about 1.4 miles east. Other landmarks nearby include Bognor Regis War Memorial Hospital (1.5 miles north-east) and Bognor Regis Museum (1.2 miles east).
When to call us in Aldwick
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Look out for any of the following:
- Failed sealant between panels on a façade
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
If you let a flat or house near Bognor Regis station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Is VAT in the price?
- How the joint is cleaned and prepared
- When the joint can take water or movement
- The length of the guarantee
Landlords, agents and businesses in Aldwick
Letting agents often deal with us directly. Tell us the address, the job and how access works.
For anyone letting property in or around Aldwick, several properties can be quoted together. Send us the addresses and the work at each.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Render that is blown, hollow or coming away
- Cracking across the wall rather than at a joint
- Cutting new joints into brickwork, which is building work rather than sealant work
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Concrete & block
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
Quotes for external mastic in Aldwick
Call for a quick quote. The main things that affect it are:
- The number and length of the joints
- Whether there’s mould to deal with
- When we can work, for business premises
- The type of sealant required
Combining jobs into one visit is usually more efficient than separate visits. You will get one clear quote for the whole job.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Where the job is, and your postcode
- Any previous sealing or DIY work
Every job is quoted individually. Just phone 0345 464 0079 or email us with the details, and pictures are welcome.