Southampton · England

Floor Joint Sealing in Portswood

Floor joint sealing for Portswood and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.

  • Perimeter joints in tiled floors filled with grout
  • Open joints around bathroom floor edges
  • Skirting that has pulled away from the floor

Floor joint sealing near Portswood

Floor joint sealing in Portswood

Floors move, and the joint where they meet a wall, skirting, threshold or another floor has to move with them. Skirting-to-floor gaps, tiled floor joints and concrete joints are all sealed with a sealant suited to the movement and traffic. We work on commercial floors, thresholds and concrete floor joints, and the jobs we see most are perimeter joints in tiled floors filled with grout and floor edges that trap water and grime.

For a new home in or near Portswood, it’s worth checking the sealant early. Common snags include open skirting joints, lifting shower seals and gaps around frames.

We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.

Place
Portswood (SO17, SO14, SO18)
Wider area
Southampton
Guarantee
A year, on every job
Quote
A clear price before we start
Call
0345 464 0079
Last updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

Floor joint sealing around Portswood

Floors around Southampton run from suspended timber in older homes to concrete in newer houses and units, and each moves in its own way. The joint at the skirting or threshold has to allow for that.

For buildings such as Highfield Church, joints in its floors, skirtings and thresholds need resealing as they wear. Rented homes near St Denys station change hands often, and a tidy floor and skirting joint helps a rental look ready for the next tenant. Managing a site like St Denys Primary School? Then floor joints in corridors, halls and entrances take heavy wear and need resealing before the edges break up.

Portswood is about 1 mile north of Southampton, in Southampton. We provide floor joint sealing to homes and businesses in Portswood and the surrounding area. Our Southampton coverage runs to 40 places, Portswood among them.

Work in SO17, SO14 and SO18 is quoted and booked the same way as anywhere else. You’ll find streets such as Ivy Road, Alma Road and Lawn Road, and we cover them all. You will find Portswood on the A335 and A3035, so it’s easy for us to get to. If you are just outside Portswood, we cover St Denys (1 mile south-east), Southampton (1 mile south), Inner Avenue (1 mile south-west), Bitterne Manor (1 mile south-east) and Bitterne Park (1 mile east). Within a short drive, we also cover Thornhill (3 miles south-east), Maybush (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Millbrook (3 miles west) and Weston (3 miles south).

What’s near Portswood

In Portswood, that means homes and buildings near St Anne's Catholic School, St Mary's Independent School and South Western Arms and the streets around them. Portswood has its own railway station: St Denys station. Nearby you’ll also find Marlands Shopping Centre (1.5 miles south) and Royal South Hants Hospital (0.9 miles south). For a walk, there’s Netley Common.

Map of Portswood © OpenStreetMap contributors

Should I try it myself first?

Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.

Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.

The process

Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for most rooms, longer for large commercial floors. Parking around Portswood is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.

  1. First, the floor type, the gap and the traffic are checked.
  2. Any old caulk, grout or sealant is raked or cut out.
  3. We vacuum out the joint and add backing where the depth needs setting.
  4. We apply the sealant in a colour that suits the floor.
  5. The joint is tooled neatly and the cure time explained.

How to prepare

  • Tell us about any water getting in
  • Tell us about any previous sealing or DIY attempts
  • Mention any sign-in or site rules at work premises

Get a quote

Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.

Get a price

Related advice

For landlords and businesses

Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.

Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.

Aftercare tips

A little care helps the new joints last. We recommend:

  • Get cracks along tile grout lines looked at early
  • Keep floor cleaning water to a minimum at the edges
  • Lift furniture rather than dragging it across joints
  • Ask before painting over a sealed joint

Follow the cure time before walking on or cleaning the joint. Feet are normally fine before mopping or wheeled traffic so we will give you each time.

Concrete joints damaged by traffic get worse quickly. Early resealing helps keep the joint intact and the floor safer.

Surface by surface

Commercial floors

Floor joint work in businesses can be planned around your hours. Out-of-hours working can be arranged if the floor is busy.

Thresholds

Threshold joints get a lot of feet, so we choose a hard-wearing, flexible product and tool it flush.

Why it’s worth doing now in Portswood

Caulk is quick and cheap, but it cracks where the joint moves or gets wet, so the gap reappears. A flexible sealant stretches instead, so the joint stays closed. Homes in smaller places like Portswood can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.

We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email and we’ll talk you through it.

Why Portswood clients choose us

  • A 12-month guarantee on all work
  • More than 20 years in sealant work
  • White, clear, grey or another colour, product permitting
  • Colour picked to suit the job

Read our cost guide or our reviews.

FAQs for Portswood

Is Portswood in your area for floor joint sealing?

Yes. Our work covers London and the South East, and Portswood is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.

I let a flat near St Denys station. Can you help?

Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can ring 0345 464 0079 or email us with the details for a clear quote.

Do the sealants smell?

That depends on the sealant. Some smell for a while, some hardly at all.

How do I get a quote for floor joint sealing in Portswood?

Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or drop us an email with a short description of the job.

Do you work on commercial floors?

Yes. Concrete floor joints in warehouses and units are part of our work. We’ll talk through the traffic and choose a sealant suited to it.

What information do you need?

Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.

Do you guarantee your work?

Yes. Each job is guaranteed for twelve months, large or small.

What do you put in the joint?

It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.

Quotes for floor joint sealing in Portswood

We quote each job individually. These are the things that affect it:

  • Mould in or behind the old joints
  • Which sealant suits the joint
  • Access and height
  • The size of the job

Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.

Asking for a quote

What to tell us when you ask for a quote:

  • Whether it’s a home or a business
  • The address or postcode of the job
  • Any previous sealing or DIY work
  • The rough size of the job

There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job