Hampshire · England
Mislingford External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Mislingford, backed by a 12-month guarantee. Call for a quick quote.
- Joints with sealant missing in places
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
External mastic in Mislingford, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. Typical jobs include gaps where render, brick and frames meet and brick movement joints where the sealant has split, across brickwork movement joints, joints between brick and frames and façade panels.
In a village or hamlet like Mislingford, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Where
- Mislingford (PO17)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Walls and rooflines in Mislingford
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Botley station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Mislingford is about 5 miles north of Fareham, in Hampshire. Jobs in Mislingford get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Mislingford is one of 683 places in Hampshire where we work. We also work in Portsmouth, around 9 miles away.
Here we cover the PO17 postcode area for external mastic. We also cover Kingsmead (1 mile south), Woodend (1 mile south-east), Hill Grove (1 mile north), Shirrell Heath (1 mile west) and Swanmore (1 mile north-west). Larger places within reach include Winchester (11 miles north-west), Gosport (9 miles south), Havant (9 miles south-east), Eastleigh (8 miles west), Fareham (5 miles south) and Horndean (7 miles east).
Local landmarks in Mislingford
We work in homes and buildings around The Roebuck pub, among other places. The closest station to Mislingford is Botley station, roughly 4 miles west. A little further out are Knowle Hospital (3.6 miles south-west) and Bishop's Waltham Museum (2.7 miles north-west). Open spaces near Mislingford include St Clair's Meadow.
Also near Mislingford
Also in Mislingford
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Keep water from gutters off the wall
- Show decorators and builders where the movement joints are
- Clear growth from the base of walls and joints
- Make sure movement joints are not pointed over
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint, and paint can crack as the joint moves.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
Questions from Mislingford
Is Mislingford within the area you cover?
Yes, Mislingford is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Mislingford in your area for external mastic?
Yes. Our work covers London and the South East, and Mislingford is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Where do you work from?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. We’ll confirm how long when we quote.
How do you reach high-level joints?
Each building is different. Send us pictures and a rough idea of the height, and we will confirm what access is needed.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Signs you need external mastic in Mislingford
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
The most common problems we see are:
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
- Sealant pulling away from one side of the joint
If you look after a building such as Swanmore College of Technology, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before you book
- Which sealant they’ll use, and why
- Who turns up on the day
- What the cure time is
- Whether all the old sealant comes out first
How the visit works
At the end, we look at the finished work together and explain the cure time. The work normally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. Somewhere as small as Mislingford, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
What sealant work can’t fix
Before you book, it’s worth knowing the limits too:
- Failed render or damaged cladding panels
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Surfaces we seal
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Copings & trims
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.