Hampshire · England
External Mastic in Heckfield
External mastic for Heckfield, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sealant gone brittle and cracked
- Brick movement joints where the sealant has split
- Water getting into walls through failed joints
External mastic for homes and businesses in Heckfield
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. Common call-outs are for hard, crazed mastic that has stopped moving and brick movement joints where the sealant has split, on copings & trims, brickwork movement joints and render & cladding joints.
Older homes in small places like Heckfield may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
You get a 12-month guarantee, the same in Heckfield as everywhere else we work.
- Location
- Heckfield (RG27)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Heckfield
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and make things worse.
Keep an eye out for these signs:
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
Letting a property close to Mortimer station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- Whether they’re fully insured
- Whether they seal over old material or remove it
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. Joints of the same age tend to fail together, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Heckfield, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why us?
- ARBOMaster approved applicator
- A sealant colour to suit the surroundings
- Arbo and Everbuild products
- Neat joints and a tidy finish
Walls and rooflines in Heckfield
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Stratfield Saye House (about 1.7 miles west) nearby, there’s older building stock in the area around Heckfield as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to Church of St Michael include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. For site and facilities teams at buildings such as Daneshill School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Heckfield is about 6 miles west of Yateley, in Hampshire. For external mastic in and around Heckfield, please phone 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Hampshire, Heckfield included. Our area takes in 683 places across Hampshire. Reading is on our list too, around 7 miles away.
All of RG27 is within our area for external mastic, from the main roads to the quietest streets. Streets in the area include Church Lane and Chamberlains Meadow, and we cover them all. Nearby, we also carry out external mastic in Heckfield Heath (1 mile north), Hound Green (1 mile south), Bramshill (1 mile east), Hazeley (1 mile south-east) and Riseley (1 mile north). Further out, we also cover Basingstoke (8 miles south-west), Farnborough (9 miles east), Fleet (7 miles south-east), Aldershot (11 miles south-east), Alton (13 miles south) and Yateley (6 miles east).
Local landmarks in Heckfield
Typical jobs here are in homes near New Inn and Wellington Country Park and the streets around them. Heckfield’s nearest station is Mortimer station, roughly 3.9 miles north-west. Well-known places in the area include Beaumys Castle (2.6 miles north) and West Green House Agricultural Museum (3 miles south-east). Not far away are The Marshes Local Nature Reserve.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Heckfield and across Hampshire. We can quote a run of properties together, and we are fully insured for the work.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Heckfield needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about parking restrictions
Get a quote
For a quote, call 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 we start.
Related advice
When it is not the sealant
New sealant cannot fix everything, and we will tell you before we start. It won’t solve:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Render that’s blown, hollow or coming away
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- The amount of work
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- Which sealant suits the joint
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Helping us quote
When you contact us, these details help:
- Whether it has been sealed before
- Whether it’s a home or a business
- Any access issues, like height or stairs
- The address or postcode of the job
For external mastic in Heckfield, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Heckfield: your questions answered
Do you cover smaller places like Heckfield?
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.
Do you work for landlords with property near Mortimer station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
How long does external mastic take?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer.
When will the joints need doing again?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Also near Heckfield
More services for Heckfield
Different surfaces, different methods
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.