Hampshire · England
Warborne External Mastic
Professional external mastic in and around Warborne, with every bit of old sealant taken out first and a 12-month guarantee.
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
Landlord and commercial work in Warborne
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
External mastic in Warborne, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. We are often asked to deal with moss and dirt in joints with no sealant left and rain getting behind render or cladding at a joint, on brickwork movement joints, render & cladding joints and copings & trims.
External sealant needs dry, clean surfaces, so work around Warborne is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Warborne (SO41)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the problem grows beyond the joint itself. In a small place like Warborne, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why Warborne customers choose us
- 20+ years of sealant experience
- 180+ five-star Google reviews
- Arbo and Everbuild products
- Anti-fungal silicone where joints get wet
See our cost guide or customer reviews.
External mastic in Warborne: local notes
Warborne is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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.
In the older streets around Saint Nicholas Chapel, the joints between older walls, newer extensions and the roofline need a sealant that can move. Managing a site like Southlands School? Then its movement joints, gutters and trims need looking after like any other building’s.
Warborne is about 1 mile north of Lymington, in Hampshire. We provide external mastic to homes and businesses in Warborne and nearby. 683 places in Hampshire are on our list, large and small. There’s also a page for Southampton, roughly 12 miles from Warborne.
All of SO41 is covered for external mastic. We also cover the places around Warborne: Pilley (1 mile north-east), Boldre (1 mile north-west), Portmore (1 mile east), Pilley Bailey (1 mile north-east) and Bull Hill (1 mile north-east). Within a short drive, we also cover Totton (10 miles north), Hedge End (14 miles north-east), Romsey (15 miles north), Hythe (8 miles north-east), New Milton (5 miles west) and Ringwood (12 miles north-west).
Landmarks near Warborne
In Warborne, that means homes and buildings near William Gilpin Church of England Primary School, Priestlands School and Walhampton Arms, among other places. For rail, the closest station is Lymington Town station, about 1 mile south of the centre. A little further out are St Barbe Museum and Art Gallery (1.2 miles south) and Lymington New Forest Hospital (0.5 miles south-west). Not far away are Boldre Foreshore.
Your questions about external mastic in Warborne
Is external mastic in a coastal place like Warborne any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Will you come out to Warborne?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
How long does external mastic last?
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 does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or email us with a short description of the job.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Surface by surface
Cladding and façade panels
If the façade has a specified sealant, that is what we use. Send us any details you have about the façade.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Looking after it afterwards
After the cure time, these simple habits help:
- Keep water from gutters off the wall
- Leave the joints unpainted unless we’ve said otherwise
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
What we do, step by step
When we arrive, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere like Warborne needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
How to get a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Advice
What we are called out for in Warborne
Some movement joints have been pointed up with mortar by mistake. The joint can’t move, so the wall cracks somewhere else instead.
Signs it’s time to call us include:
- Joints pointed up with cement by mistake
- Moss and dirt in joints with no sealant left
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
If you let a flat or house near Lymington Town station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- What insurance they hold
- How long the guarantee is
- How the joint is cleaned and prepared
- How the colour is chosen
What we can’t put right
Before you book, it’s worth knowing the limits:
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Warborne
- Copings & trims
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames