Hampshire · England
External Mastic in Old Netley
Specialist external mastic for Old Netley: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Weeds or debris growing in open joints
- Weathered mastic that no longer stretches
- Leaking joints around cladding and façade panels
Your questions about external mastic in Old Netley
Do you work for landlords with property near Bursledon station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Does the coastal weather in Old Netley affect outside sealant?
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.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Do you cover Old Netley?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Where do you work from?
We are a Crawley-based firm. We work across South East England, London and Scotland.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
External mastic for homes and businesses in Old Netley
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on concrete & block, joints between brick and frames and render & cladding joints, and people most often call us about panel joints letting water in and sealant that has lost its bond to the brick or render.
External sealant needs dry, clean surfaces, so work around Old Netley is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, it’s backed by our one-year guarantee in Old Netley and across Hampshire.
- Where
- Old Netley (SO31)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
More services for Old Netley
What external mastic looks like in Old Netley
Old Netley 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. 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Bursledon Church of England Infant School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For landlords with property near Bursledon station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Old Netley is about 2 miles south-west of Hedge End, in Hampshire. We provide external mastic to homeowners, landlords and businesses in Old Netley and nearby. Old Netley is one of 683 towns and villages in Hampshire where we work.
We work across SO31 for external mastic and the streets around it. You will find streets such as Darlee Gate, Green Lane and Cranbury Gardens. Neighbouring places we cover for external mastic include Lowford (1 mile north-east), Bursledon (1 mile east), Butlocks Heath (1 mile south-west), Hound (1 mile south-west) and Netley (1 mile south-west). Larger places within reach include Winchester (12 miles north), Gosport (10 miles south-east), Havant (15 miles east), Eastleigh (5 miles north), Fareham (6 miles south-east) and Horndean (14 miles east).
Local landmarks in Old Netley
Around Old Netley, our work takes us to homes and buildings near Oasis Academy Mayfield, Westwood Woodland Park and The Linden Tree pub and the streets around them. Old Netley’s nearest station is Bursledon station, about 1 mile south-east. Nearby you’ll also find Coldeast (2.3 miles south-east) and Bursledon Brickworks Industrial Museum (1.6 miles east). Open spaces near Old Netley include Netley Common.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Old Netley, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- 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.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Clear the area around the work
- Mention if the joints have been sealed before
- Mention any parking rules near the property
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Advice
When to call us in Old Netley
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
The most common problems we see are:
- Plants rooting in failed movement joints
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Sealant pulling away from one side of the joint
Homes close to St Paul’s Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before booking anyone
- Whether VAT is included
- The length of the guarantee
- How the joint is cleaned and prepared
- Which colour the sealant will be
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep water from gutters off the wall
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
- Ask before painting over external sealant
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
Landlord and commercial work in Old Netley
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Older cottages and farmhouses around Old Netley can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- We leave the area clean and tidy
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
- Old sealant always removed completely
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- Whether there’s mould to deal with
- The product the joint needs
- The amount of work
- How easy the joints are to reach
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 the work is at height. Your quote takes all of that into account.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Photos by email, if that’s easy
- If someone has resealed it before
- The address or postcode of the job
- Any access issues, like height or stairs
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the 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.