Hampshire · England
Rowner External Mastic
Professional external mastic in and around Rowner, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Rigid filler in a joint that should flex
- Gaps where render, brick and frames meet
What external mastic looks like in Rowner
Rowner is close to 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.
Homes close to St Matthew's include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. If you let a flat or house near Fareham station, outside joints that have cracked can let damp into a rental, so check them between lets.
Rowner is about 2 miles north-west of Gosport, in Hampshire. Every kind of property in Rowner can book us for external mastic. Every job comes with our 12-month guarantee. We cover 683 towns and villages across Hampshire, from the larger towns to small villages.
Here we cover the PO13 and PO14 postcode area for external mastic. That includes homes and businesses on Wych Lane, Camp Road and Keyes Road. Other places close to Rowner include Bridgemary (1 mile south-east), Peel Common (1 mile west), Crofton (1 mile west), Elson (1 mile south-east) and Lee-on-the-Solent (2 miles south-west). Further out, we also cover Havant (9 miles east), Eastleigh (12 miles north-west), Horndean (9 miles north-east), Chandler's Ford (15 miles north-west), Hedge End (9 miles north-west) and Waterlooville (8 miles north-east).
Landmarks near Rowner
Locally, jobs take us to homes and businesses close to Holbrook Primary School, The Green Dragon pub and Baycroft School and the streets around them. The closest station to Rowner is Fareham station, roughly 2.3 miles north. Well-known places in the area include Gosport War Memorial Hospital (2.3 miles south-east) and Portchester Castle (2.9 miles east). Open spaces near Rowner include West of the River Alver and Portsdown Hill.
External mastic in Rowner
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 access is needed. Typical jobs include joints pointed up with cement by mistake and gaps where render, brick and frames meet, on joints between brick and frames, copings & trims and brickwork movement joints.
Around Rowner, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Rowner (PO13, PO14)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for.
We also work for property managers and facilities teams. We can quote a run of properties together.
Honest limits
A few problems are outside what sealant work can do:
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Rowner
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours to a few days, depending on the length of joint and the access, including the tidy-up. A visit to Rowner 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.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Clear items away from the joints we are working on
- Tell us about any water getting in
- Let us know about stairs, lifts or work at height
Ask for a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Read more
When to call us in Rowner
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Common reasons people contact us are:
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Panel joints letting water in
- Joints pointed up with cement by mistake
Managing a site like Bridgemary School? Then larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- Are they insured?
FAQs for Rowner
Does living near the coast affect external mastic in Rowner?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
I let a flat near Fareham station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
Do you work in Rowner?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides, primed where needed.
Towns and villages near Rowner
What else we do in Rowner
What happens if it’s left?
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In a smaller place like Rowner, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What you get with us
- A 12-month guarantee on all work
- Colour agreed with you before we start
- Tidy, careful work
- Fully insured
Take a look at what affects the cost or our reviews.
What affects the quote in Rowner
Every job gets its own quote. This is what makes a difference:
- The type of sealant required
- The old material and how stubborn it is
- How much there is to do
- The number of rooms or windows
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Helping us quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- Whether it’s a home or a business
- Roughly how big the job is
- A few pictures by email, if you can
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear price.
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.