Hampshire · England
External Mastic in Bentworth
External mastic for Bentworth, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
About our external mastic in Bentworth
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. If you have movement joints with cracked, split or missing sealant and sealant pulling away from one side of the joint, we can help.
Somewhere as small as Bentworth, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Bentworth (GU34)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- The size of the job
- The type of sealant required
- Access and height
- When we can work, for business premises
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
Asking for a quote
To help us quote quickly, let us know:
- Any access issues, like height or stairs
- The problem you’ve noticed
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
External mastic in Bentworth: local notes
Historic houses like Hall Place (about 0.2 miles south-west) are a reminder that the area around Bentworth has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as St Mary's Bentworth Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near Alton station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Bentworth is about 3 miles west of Alton, in Hampshire. Homes, rented property, offices and hotels in Bentworth is covered for external mastic. The work is guaranteed for a year. Our Hampshire coverage runs to 683 places, and Bentworth is one of them. There’s also a page for Reading, about 20 miles away.
Jobs for external mastic in GU34 is quoted and booked the same way as anywhere else. Local streets include Village Street, Church Street and Drury Lane. Neighbouring places we cover for external mastic include Holt End (1 mile south-west), Thedden (1 mile south-east), Wivelrod (1 mile south-east), New Copse (1 mile south-west) and Beech (2 miles south-east). We also work in nearby towns such as Basingstoke (8 miles north), Winchester (13 miles south-west), Farnborough (15 miles north-east), Fleet (12 miles north-east), Aldershot (14 miles north-east) and Alton (3 miles east).
Near you in Bentworth
Typical jobs here are in homes near The Star Inn and the streets around them. The closest station to Bentworth is Alton station, about 3.5 miles east of the centre. A little further out are Barton Castle (3.2 miles south-west) and Gliding Heritage Centre (2.2 miles north-east). Green spaces nearby include King's Hill.
Questions from Bentworth
Can you do external mastic in Bentworth?
Yes, Bentworth is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
I let a flat near Alton station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
How much does external mastic cost in Bentworth?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
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.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- 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, call 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Render & cladding joints
The process
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Bentworth, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- 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.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
- Clear the area around the work
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or email us.
Read more
Other services in Bentworth
Aftercare tips
Good habits help new joints last longer. A few tips:
- Keep soil, plants and ivy away from the joints
- Look over the joints every year, ideally after winter
- Check the sealant is paintable before painting near it
- Tell anyone working on the walls about the movement joints
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We work for letting agents and landlords as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
What we’re called out for in Bentworth
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Any of these means the joints need attention:
- Panel joints letting water in
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
For an older house near a landmark such as St. Mary's Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- Whether they seal over old material or remove it
- Who turns up on the day
- What preparation is included
- How the colour is chosen