Hampshire · England
External Mastic in Isington
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Isington and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
External mastic in Isington, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. We’re often asked to deal with damp patches traced to an open external joint and hard, crazed mastic that has stopped moving, on concrete & block, render & cladding joints and joints between brick and frames.
Older homes in small places like Isington may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
All our work is covered by a 12-month guarantee, wherever you are in Hampshire.
- Place
- Isington (GU34)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Signs you need external mastic in Isington
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.
The problems people normally mention when they call include:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Old sealant gone brittle and cracked
Rented homes near Bentley (Hampshire) station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- What insurance they hold
- What guarantee comes with the work
- Whether you can choose the colour
- Who turns up on the day
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep high-pressure jets off the joints
- Point out the joints to other trades
- Keep movement joints as flexible joints, not mortar
- Keep soil, plants and ivy away from the joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Once a joint can’t move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant is not too deep.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant.
What affects the quote in Isington
We quote each job individually. These are the things that affect it:
- How many rooms, windows or areas are involved
- The amount of work
- The old material and how stubborn it is
- When we can work, for business premises
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Helping us quote
To help us quote quickly, let us know:
- A few pictures by email, if you can
- Any previous sealing or DIY work
- Roughly how big the job is
- Where the property is
For external mastic in Isington, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before we start.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that’s more than a sealant joint can take
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
Nearby places to Isington
More services for Isington
What we do, step by step
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Isington, 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.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- 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
- Let us know if you’ve seen damp or leaks
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we are working on
Get a quote
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
Advice
Outside joints around Isington
With historic houses such as Farnham Castle (about 4.6 miles north-east) nearby, there’s older building stock in the area around Isington as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of the Holy Cross, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as Binsted Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Isington is about 4 miles north-east of Alton, in Hampshire. Wherever you are in the GU34 postcode area, our applicators can take on external mastic. Our area takes in 683 places across Hampshire, from the larger towns to small villages. Reading is on our list too, about 19 miles from Isington.
All of GU34 is within our area for external mastic, from the main roads to the quietest streets. Nearby, we also carry out external mastic in Binsted (1 mile south), Blacknest (1 mile east), Bentley (1 mile north-east), Bucks Horn Oak (2 miles east) and Frithend (2 miles south-east). Larger places within reach include Basingstoke (11 miles north-west), Farnborough (10 miles north-east), Fleet (7 miles north), Aldershot (7 miles north-east), Alton (4 miles south-west) and Petersfield (12 miles south).
Landmarks near Isington
In Isington, that means homes and buildings near The Star Inn and the streets around them. For rail, the closest station is Bentley (Hampshire) station, about 0.8 miles east. Other landmarks nearby include Chase Community Hospital (5 miles south) and Barley Pound (2.8 miles north-east). Not far away are Farnham Heath and Holybourne Hill.
Common questions in Isington
I let a flat near Bentley (Hampshire) station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or email us with the details for a clear quote.
Is Isington within the area you cover?
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.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few photos.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
How long does external mastic last?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and reseal when it splits.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient.