Portsmouth · England
External Mastic in Rudmore
Professional external mastic in and around Rudmore, with old sealant always removed completely and a 12-month guarantee.
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
- Damp patches traced to an open external joint
Landlord and commercial work in Rudmore
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
About our external mastic in Rudmore
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. Typical jobs include water getting into walls through failed joints and brick movement joints where the sealant has split, on joints between brick and frames, copings & trims and façade panels.
Houses in smaller places like Rudmore can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. That is where gutter joints and wall joints tend to fail first.
Big or small, it’s backed by our 12-month guarantee.
- Where
- Rudmore (PO2, PO1)
- Wider area
- Portsmouth
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Rudmore
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Any of these means the joints need attention:
- Joints pointed up with cement by mistake
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
If you let a flat or house near Portsmouth & Southsea station, split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- Is the old sealant removed completely?
- What preparation is included
- What the cure time is
- Who turns up on the day
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you do try it yourself, take your time over the 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.
How the visit works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. A visit to Rudmore is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- 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.
How to prepare
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Advice
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly.
Common questions in Rudmore
Will you come out to Rudmore?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Does the coastal weather in Rudmore affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you work for landlords and businesses?
Yes. As well as householders, we work for landlords, agents, businesses and hotels.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
Also in Rudmore
External mastic in Rudmore: local notes
Rudmore is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as The Flying Bull Academy are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Rudmore is about 1 mile north-west of Portsmouth, in Portsmouth. Jobs in Rudmore get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Portsmouth, we cover 19 places, and Rudmore is one of them.
All of PO2 and PO1 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Knox Road, Wharf Road and Croft Road. You’ll find Rudmore on the M275 and A2047, which makes it straightforward to reach with everything needed for external mastic. If you’re just outside Rudmore, we cover North End (1 mile north-east), Tipner (1 mile north-west), Portsmouth (1 mile south-east), Landport (1 mile south) and Copnor (1 mile east).
What’s near Rudmore
We work in homes and buildings around Alexandra Park, The Admiral Drake pub and Mayfield School. For rail, the closest station is Portsmouth & Southsea station, roughly 1.1 miles south of the centre. Other landmarks nearby include Tricorn Centre (0.8 miles south) and Portchester Castle (2.1 miles north-west). Not far away are Milton Locks and Portsdown Hill.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Look over the joints every year, ideally after winter
- Keep water from gutters off the wall
- Point out the joints to other trades
- Do not let climbing plants root in the sealant
Do not paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
What we can’t put right
We’d rather tell you now than do work that will not last, so these are the limits:
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
- Adding movement joints to masonry that has none
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Rudmore
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Concrete & block