Portsmouth · England
Portsmouth Point External Mastic
Our applicators work in Portsmouth Point on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
How we handle external mastic in Portsmouth Point
Low-level joints can usually be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. If you’re dealing with brick movement joints where the sealant has split and sealant pulling away from one side of the joint, we can put it right.
Outbuildings, garages and conservatories around homes in places like Portsmouth Point add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or drop us an email.
- Where
- Portsmouth Point (PO1, PO5, PO12)
- Region
- Portsmouth
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
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 smaller place like Portsmouth Point, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
Why book with us
- Arbo and Everbuild products
- Every job guaranteed for a year
- Sanitary silicone with an anti-fungal additive in wet areas
- Any old sealant cut out fully, not covered over
Your questions about external mastic in Portsmouth Point
Do you work for landlords with property near Portsmouth Harbour station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Does living near the coast affect external mastic in Portsmouth Point?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
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.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
What we are called out for in Portsmouth Point
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Joints with sealant missing in places
- Weathered mastic that no longer stretches
- Rain getting behind render or cladding at a joint
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Portsmouth Harbour station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- What the cure time is
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
- Is VAT in the price?
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep movement joints as flexible joints, not mortar
- Get split or bare joints resealed while the damage is small
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
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.
What external mastic looks like in Portsmouth Point
Portsmouth Point 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. That is hard on movement joints and outside wall joints, especially on the side facing the sea. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Portsmouth Garrison church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. If you look after a building such as St Jude's CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Portsmouth Point is about 2 miles west of Southsea, in Portsmouth. Homes, rented property, offices and hotels in Portsmouth Point is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Our Portsmouth coverage runs to 19 places, and Portsmouth Point is one of them.
Work in PO1, PO5 and PO12 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Park Road, Nobbs Lane and Bath Square or a nearby road, we can help. We also cover the places around Portsmouth Point: Portsea (1 mile north), Clayhall (1 mile south-west), Haslar (1 mile south-west), Alverstoke (2 miles south-west) and Privett (2 miles west). We also work in nearby towns such as Hilsea (3 miles north-east), Wymering (4 miles north), Paulsgrove (4 miles north), Cosham (4 miles north-east), Drayton (5 miles north-east) and Farlington (5 miles north-east).
What’s near Portsmouth Point
Typical jobs here are in homes near Charter Academy, Portsmouth Grammar School and Bridge Tavern and the streets around them. There’s a railway station in Portsmouth Point itself: Portsmouth Harbour station. Other landmarks nearby include Southsea Castle (1.2 miles south-east) and Portsmouth Museum And Art Gallery (less than half a mile east). For a walk, there’s Portsdown Hill and Milton Locks.
Quotes for external mastic in Portsmouth Point
The price is agreed before any work begins. It’s based on:
- Whether the work is at height
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- The type of sealant required
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Whether it has been sealed before
- How many joints, rooms or windows are involved
There’s no standard price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or send us an email.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Towns and villages near Portsmouth Point
More services for Portsmouth Point
Surface by surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
What we do, step by step
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work starts. The work normally takes a few hours for a handful of joints, longer for a whole elevation. Parking around Portsmouth Point is usually 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 inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.