Portsmouth · England
External & façade joints in Tipner, Portsmouth
External mastic for Tipner, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
External mastic in Tipner: local notes
Tipner 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. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Portsmouth & Southsea station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around St Saviour's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Tipner is about 1 mile north-west of Portsmouth, in Portsmouth. For external mastic in and around Tipner, please ring 0345 464 0079 or send us an email for a quick quote. We cover Portsmouth from our Crawley base. 19 places in Portsmouth are on our list.
Our applicators cover all of PO2 for external mastic and the streets around it. We cover properties on Knox Road, Croft Road and Whaley Road and the roads around them. You will find Tipner on the M275 and A2047, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in North End (1 mile east), Rudmore (1 mile south-east), Portsmouth (1 mile south-east), Landport (1 mile south) and Hilsea (1 mile north-east).
What’s near Tipner
Typical jobs here are in homes near St Edmund's Catholic School, Mother Shipton pub and Mayfield School and the streets around them. For rail, the closest station is Portsmouth & Southsea station, about 1.4 miles south of the centre. A little further out are Charles Dickens Birthplace Museum (0.8 miles south) and Portchester Castle (1.8 miles north-west). Open spaces near Tipner include Milton Locks and Portsdown Hill.
About our external mastic in Tipner
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. Common call-outs are for old sealant gone brittle and cracked and sealant that has lost its bond to the brick or render, on concrete & block, brickwork movement joints and façade panels.
Homes around Tipner range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Your job is guaranteed for a year, as with all our work.
- Location
- Tipner (PO2)
- Wider area
- Portsmouth
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
More services for Tipner
Your questions about external mastic in Tipner
Will you come out to Tipner?
Yes, Tipner is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Portsmouth & Southsea station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Should I point up the gap in my brickwork?
No. Rigid materials cannot move with the wall, so the joint stops doing its job. If it has already been filled, we can generally cut it out and reseal it.
When is the sealant fully cured?
Cure times vary by product. Before we leave, we will tell you the cure time.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Signs you need external mastic in Tipner
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
The problems people generally mention when they call are:
- Hard, crazed mastic that has stopped moving
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
If you look after a building such as Stamshaw Infant Academy, larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- How long to leave it before use
- Whether they seal over old material or remove it
- Which colour the sealant will be
- How much experience the applicator has
When it is not the sealant
In fairness, some problems need a different trade:
- Failed render or damaged cladding panels
- Adding movement joints to masonry that has none
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
How the job changes by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A careful DIYer can reseal a simple joint, 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.
The process
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Parking around Tipner is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- 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
- Tell us about any water getting in
- Clear items away from the joints we’re working on
- Let us know about parking restrictions
How to get a quote
We don’t publish a price list. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
Advice
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Show decorators and builders where the movement joints are
- Avoid pressure-washing directly into sealant joints
- Walk round the building once a year and look at the joints
- Never let anyone fill a movement joint with mortar
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
Why it’s worth doing now in Tipner
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In an older home around Tipner, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- Trusted Arbo and Everbuild sealants
- Anti-fungal silicone where joints get wet
- 20+ years of sealant experience
- We never seal over old sealant
See our cost guide and our reviews.