Hampshire · England
External Mastic in Monkwood
Professional external mastic in and around Monkwood, with old sealant always removed completely and a 12-month guarantee.
- Water getting into walls through failed joints
- Panel joints letting water in
- Weathered mastic that no longer stretches
What the job involves on each surface
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
About our external mastic in Monkwood
On houses, flats and commercial buildings across Monkwood, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on façade panels, render & cladding joints and copings & trims, and common reasons people get in touch are hard, crazed mastic that has stopped moving and rigid filler in a joint that should flex.
Somewhere as small as Monkwood, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
All our work comes with our one-year guarantee, wherever you are in Hampshire.
- Where
- Monkwood (SO24)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Monkwood
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. Older cottages and farmhouses around Monkwood can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
Why us?
- Domestic, commercial and hotel work
- Tidy, careful work
- Every job guaranteed for a year
- We agree the colour with you first
Read what affects the cost and our reviews.
Your questions about external mastic in Monkwood
Is Monkwood within the area you cover?
Yes, Monkwood is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do external mastic in Monkwood?
Yes. We work across London and the South East, and Monkwood is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Where do you work from?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
How to look after the new joints
So the new joints stay in good condition:
- Keep movement joints as flexible joints, not mortar
- Show decorators and builders where the movement joints are
- Keep water from gutters off the wall
- Check the sealant is paintable before painting near it
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
When to call us in Monkwood
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
These are the problems we’re asked about most:
- Rigid filler in a joint that should flex
- Panel joints letting water in
- Failed seals between different materials
- Weeds or debris growing in open joints
In the older streets around Monkwood Mission Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- What happens if they find a problem under the old sealant
- When the joint can take water or movement
- What the quote includes, VAT included or not
- Who turns up on the day
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Monkwood, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- 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.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Related advice
When something else is needed
We will always be straight with you, so here’s what new sealant won’t do:
- Cracks in the bricks or render themselves, away from the joints
- Movement that is more than a sealant joint can take
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Monkwood
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
Monkwood buildings and the weather
Historic houses like Hinton Ampner House (about 4.8 miles west) are a reminder that the area around Monkwood has older buildings as well as new. Where a home is older, 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.
Around Monkwood, as everywhere, external mastic is only as good as the preparation behind it.
Monkwood is about 6 miles south-west of Alton, in Hampshire. Jobs in Monkwood get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hampshire, we cover 683 places, and Monkwood is one of them. We also work in Southampton, about 18 miles from Monkwood.
Work in SO24 is quoted and booked the same way as anywhere else. You will find streets such as Hill Farm Road, Flint Fields and Soame's Lane, all of which we cover. Other places close to Monkwood include Charlwood (1 mile north-east), West Tisted (1 mile south-west), Gilbert Street (1 mile north-west), Kitwood (2 miles north) and Ropley (2 miles north-west). Within a short drive, we also cover Basingstoke (14 miles north), Winchester (12 miles west), Havant (15 miles south), Eastleigh (15 miles south-west), Horndean (11 miles south) and Alton (6 miles north-east).
What’s near Monkwood
A little further out are Alton Community Hospital (5.5 miles north-east). Open spaces near Monkwood include Red Hill and Shutts Copse.
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.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.