Portsmouth · England
Portsmouth Floor Joint Sealing
Specialist floor joint sealing for Portsmouth: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Floor edges that trap water and grime
- Skirting that has pulled away from the floor
- Perimeter joints in tiled floors filled with grout
About our floor joint sealing in Portsmouth
In commercial and industrial units, concrete floor joints take a hammering from wheels and traffic. Each is resealed with a floor-joint product suited to what runs over it. If you have failed seals where bathroom floors meet baths and panels and skirting caulk that keeps splitting, we can help, whatever the surface.
A place the size of Portsmouth has new developments as well as older streets. Snags in sealant and floor joints often show in a new home’s first year or two.
Our work is backed for twelve months.
- Place
- Portsmouth (PO6, PO4, PO1, PO2)
- Region
- Portsmouth
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Floor joints left open collect dirt that’s hard to clean out. Sealed joints are easier to keep clean and look tidier. For landlords in Portsmouth, failed sealant soon turns into tenant complaints about mould, damp or draughts. It’s simpler to sort between tenants than in the middle of a let.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Why choose Mr Mastic in Portsmouth
- Colour picked to suit the job
- We never seal over old sealant
- Neat joints and a tidy finish
- 20+ years of sealant experience
Read what affects the cost and customer reviews.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Structural movement or subsidence
- Water getting under the tiles from elsewhere
- Loose, hollow or cracked tiles, which need a tiler
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Thresholds
- Skirting boards
- Commercial floors
- Tiled floors
- Wet room & bathroom floors
- Concrete floor joints
Landlords, agents and businesses in Portsmouth
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What affects the cost of floor joint sealing
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- Working hours on commercial sites
- How many areas need sealing
- The number and length of the joints
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What to tell us for a quote
To make quoting easier, please include:
- How we’d reach the joints
- Roughly how big the job is
- What’s wrong with the joints now
- Where the property is
Every job is quoted individually. Just ring 0345 464 0079 or send us an email with the details and send pictures if you have them.
What floor joint sealing looks like in Portsmouth
Across Portsmouth, floors range from older suspended timber floors to concrete slabs in newer homes and commercial units, and each moves in its own way. The joint at the skirting or threshold has to allow for that.
Managing a site like Manor Infant School? Then floor joints in corridors, halls and entrances take heavy wear and need resealing before the edges break up. If you look after a church, hall or community building such as St Wilfrid, joints in its floors, skirtings and thresholds need resealing as they wear.
Portsmouth is in England. Every kind of property in Portsmouth is covered for floor joint sealing, old or new, large or small. The work is guaranteed for a year. 19 places in Portsmouth are on our list, from the larger towns to small villages.
Postcode districts we cover here for floor joint sealing: PO6, PO4, PO1 and PO2. Floor joint sealing is available to properties on Church Road, April Square and Rudmore Square and the roads around them. Being close to the A3 and A27, Portsmouth is simple for us to get to. We also cover Rudmore (1 mile north-west), Landport (1 mile south-west), North End (1 mile north), Fratton (1 mile south-east) and Kingston (1 mile south-east). Further out, we also cover Wymering (3 miles north), Paulsgrove (3 miles north), Drayton (3 miles north-east) and Farlington (3 miles north-east).
Local landmarks in Portsmouth
Locally, jobs take us to homes and businesses close to The Portsmouth Academy, Alexandra Park and St Edmund's Catholic School and the streets around them. The nearest railway station is Fratton station, about 0.9 miles south of the centre. Nearby you will also find Royal Portsmouth Hospital (0.7 miles south-west) and Charles Dickens Birthplace Museum (under half a mile west). Green spaces nearby include Milton Locks and Portsdown Hill.
What we do, step by step
All our tools and materials come with us in the van. Once we have agreed what’s being done, we protect the area and start. It normally takes a few hours for most rooms, longer for large commercial floors. In central Portsmouth, parking can be tight, so tell us about driveways, permits or nearby car parks. For flats, mention stairs, lifts and shared entrances as well.
- The room is cleared along the joints so we can reach them.
- Old material is removed from the joint.
- Edges are cleaned and dried.
- A flexible sealant suited to the floor is applied.
- We check the joints and explain the aftercare.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
- Tell us about any water getting in
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Advice
DIY versus a professional finish
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.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
FAQs for Portsmouth
Can you help a landlord with a rental near Fratton station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is there a guarantee on floor joint sealing in Portsmouth?
All our work, in Portsmouth and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
How long does the job take?
Typically it takes a few hours for most rooms, longer for large commercial floors. Larger jobs naturally take longer, and we will tell you how long to expect.
Can you match the sealant colour?
Normally, yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can sealant along the skirting be painted?
For painted skirting, we use a flexible product that can be painted. Silicone will not take paint, so it’s kept for wet areas and unpainted joints.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Signs you need floor joint sealing in Portsmouth
An open floor joint fills with dirt and water. In kitchens and bathrooms, mop water gets into the gap.
The problems people generally mention when they call include:
- Caulk that has cracked where the floor moves
- Grout cracking in a straight line across a floor
- Failed seals where bathroom floors meet baths and panels
- Perimeter joints in tiled floors filled with grout
For landlords with property near Fratton station, open skirting and floor joints collect dirt and water, so seal them while the property is empty.
What to look for in a quote
- Whether they’re fully insured
- Is VAT in the price?
- Who does the work, and how experienced they are
- What the cure time is