Hampshire · England
External Mastic in Grateley
External mastic in Grateley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
About our external mastic in Grateley
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. Common call-outs are for hard, crazed mastic that has stopped moving and joints where the bead has come unstuck, on façade panels, brickwork movement joints and concrete & block.
External sealant needs dry, clean surfaces, so work around Grateley is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, it’s backed by our one-year guarantee.
- Location
- Grateley (SP11)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Grateley: your questions answered
Do you cover Grateley for external mastic?
Yes. Our work covers London and the South East, and Grateley is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Grateley station?
Yes. We work for landlords and letting agents as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
How long will you be here?
Most jobs take anything from a few hours to several days, depending on the building, including the preparation. We will confirm how long when we quote.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How do I get a quote for external mastic in Grateley?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
What affects the quote in Grateley
Call for a quick quote. What matters most is:
- Working hours on commercial sites
- Mould in or behind the old joints
- The number of rooms or windows
- The old material and how stubborn it is
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- A few photos by email, if you can
- The address or postcode of the job
- Roughly how big the job is
- If someone has resealed it before
We don’t publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
The process
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation in most cases. For a village or hamlet like Grateley, 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.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
If you are in Grateley and need external mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Advice
Grateley buildings and the weather
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.
If you live in an older home near Church of St Leonard, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Grateley station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as Grateley Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Grateley is about 6 miles south-west of Andover, in Hampshire. Across the SP11 area, we cover external mastic for homes and businesses. Grateley is one of 683 towns and villages in Hampshire where we work for external mastic. Our Southampton page covers work nearby.
Here we cover the SP11 postcode area for external mastic. You will find streets such as High Street, Station Road and Hawthorne Close. Other places close to Grateley include Palestine (1 mile south-west), Quarley (1 mile north), Fox (1 mile north-east), Amport (2 miles north-east) and Kentsboro (2 miles south-east). We also work in nearby towns such as Winchester (15 miles south-east), Andover (6 miles north-east), Romsey (14 miles south-east), Hyde (15 miles south-east), Tidworth (5 miles north-west) and Weeke (14 miles south-east).
Near you in Grateley
In Grateley, that means homes and buildings near The Plough Inn. The closest station to Grateley is Grateley station, roughly 0.9 miles south-west. A little further out are Andover War Memorial Hospital (5.4 miles north-east). Open spaces near Grateley include Winterbourne Downs RSPB reserve and Quarley Hill.
When it isn’t the sealant
It helps to know what we cannot do:
- Loose or hollow render, which needs re-rendering
- Structural movement, which needs a surveyor or engineer
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Copings & trims
- Concrete & block
Other services in Grateley
Keeping the joints in good condition
Looking after new joints is easy:
- Avoid pressure-washing directly into sealant joints
- Keep water from gutters off the wall
- Ask before painting over external sealant
- Check external joints each spring
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
What the job involves on each surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why it’s worth doing now in Grateley
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. In a small place like Grateley, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why choose Mr Mastic in Grateley
- Rated 4.9 stars on Google
- A sealant colour to suit the surroundings
- Experience in homes, commercial sites and hotels
- Anti-fungal sanitary silicone in wet areas
Take a look at how sealant jobs are priced and our reviews.