Isle of Wight · England
Cranmore External Mastic
External mastic across Cranmore and nearby, with old sealant always removed completely and a 12-month guarantee.
- Failed sealant between panels on a façade
- Joints with sealant missing in places
- Joints where the bead has come unstuck
When it is not the sealant
Before you book, it’s worth knowing the limits too:
- Rising or penetrating damp from elsewhere in the wall
- Render that’s blown, hollow or coming away
- Subsidence or other structural problems
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Copings & trims
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
External mastic for homes and businesses in Cranmore
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. We work on joints between brick and frames, brickwork movement joints and façade panels, and people most often call us about weeds or debris growing in open joints and rigid filler in a joint that should flex.
Older homes in small places like Cranmore may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Place
- Cranmore (PO41)
- Region
- Isle of Wight
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
When to call us in Cranmore
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
Historic houses such as Swainston Manor, about 3.4 miles south-east, show how far back building around Cranmore goes.
What your quote should include
- Is the old sealant removed completely?
- What guarantee comes with the work
- What the quote includes, VAT included or not
- Whether they’re fully insured
What else we do in Cranmore
What we do, step by step
You don’t need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. Somewhere like Cranmore 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.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Related advice
Cranmore: your questions answered
Does living near the coast affect external mastic in Cranmore?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Do you work for landlords with property near Lymington Pier station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Do you guarantee your work?
Yes, always. Each job is guaranteed for twelve months.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last so it’s worth doing right. Older cottages and farmhouses around Cranmore can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why Cranmore clients choose us
- More than 20 years in sealant work
- We agree the colour with you first
- Quality sealants from Arbo and Everbuild
- We leave the area clean and tidy
Read how sealant jobs are priced or our reviews.
What affects the cost of external mastic
The price is agreed before any work begins. It’s based on:
- Mould in or behind the old joints
- Whether the work is at height
- Whether old sealant or filler has to be cut out
- The size of the job
What you pay reflects the work, not guesswork. That is why we ask about the job first and give you a clear quote before any work starts.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- Whether it has been sealed before
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
External mastic in Cranmore: local notes
Cranmore is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Swainston Manor (about 3.4 miles south-east) nearby, there’s older building stock in the area around Cranmore as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Lymington Pier station? Then outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Shalfleet Church of England Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Cranmore is about 6 miles south-east of Lymington, in the Isle of Wight. We provide external mastic to homes and businesses in Cranmore and nearby. Our the Isle of Wight coverage runs to 125 places, and Cranmore is one of them. There’s also a page for Southampton, about 14 miles away.
Postcode districts we cover here for external mastic: PO41. Whether your property is on Solent Road, East Close and Cranmore Avenue or a nearby road, our applicators can take on the job. Other places close to Cranmore include Hamstead (1 mile north-east), Shalfleet (1 mile south-east), Bouldnor (1 mile west), Yarmouth (2 miles west) and Thorns Beach (4 miles north). Within a short drive, we also cover Newport (6 miles east), Ryde (12 miles east), Cowes (7 miles north-east), Sandown (13 miles east), Shanklin (13 miles south-east) and Ventnor (13 miles south-east). If you are somewhere remote, the job takes a little more planning, so let us know when you get in touch.
What’s near Cranmore
For rail, the closest station is Lymington Pier station, about 4.9 miles north-west of the centre. Other landmarks nearby include Calbourne Water Mill And Rural Museum (2.6 miles south-east) and Yarmouth Castle (2.4 miles west). Not far away are Boldre Foreshore and Compton Down.