Southampton · England
Floor Joint Sealing in St Denys
Our applicators work in St Denys on sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps between floors and kitchen plinths
- Dirt and water collecting in open floor joints
- Grout cracking in a straight line across a floor
FAQs for St Denys
Is St Denys in your area for floor joint sealing?
Yes, St Denys is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing.
Do you work for landlords with property near St Denys station?
Yes. We work for landlords and letting agents as well as householders. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Can you seal where the floor meets the bath panel?
Yes. The old joint comes out and a flexible silicone replaces it in a colour to suit.
Do you offer different sealant colours?
In most cases you can choose. We’ll tell you which colours the right product comes in.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
How long does the job take?
It depends on the size of the job, but most jobs take a morning or an afternoon for most homes. We’ll give you a better idea when we quote.
Floor joint sealing in St Denys
Good floor joints come down to the right product and clean, prepared edges. Old caulk, grout or failed sealant comes out first, the joint is cleaned and backed where needed, then the new sealant goes in. Common call-outs are for grout used at the floor edge instead of sealant and failed seals where bathroom floors meet baths and panels, across wet room & bathroom floors, concrete floor joints and skirting boards.
Homes around St Denys range from older cottages to newer houses, and their floors range just as widely, from timber that moves with the seasons to tiles laid on concrete. Skirting and threshold joints need a sealant that suits the floor.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- St Denys (SO17, SO18, SO14)
- Region
- Southampton
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need floor joint sealing in St Denys?
When a tiled floor has no movement joints, the grout takes the strain. You’ll see a crack running along the grout, where a flexible joint should have been.
The most common problems we see are:
- Cracked grout where a tiled floor needs a movement joint
- Threshold joints that have opened or worn
- Caulk that has cracked where the floor moves
- Rigid edge joints in tiled floors
If you look after a church, hall or community building such as Church of St Denys, floor and skirting joints in halls and kitchens wear like any others.
Before you book anyone
- What guarantee comes with the work
- How the joint is cleaned and prepared
- Whether they seal over old material or remove it
- What happens if they find a problem under the old sealant
Nearby places to St Denys
What else we do in St Denys
What affects the cost of floor joint sealing
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The old material and how stubborn it is
- Which sealant suits the joint
- Any mould that needs treating
- When we can work, for business premises
Doing several joints on one visit is normally more efficient than separate visits. We will give you a clear quote for the lot.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Access, such as stairs, a lift or height
- Where the property is
- Roughly how big the job is
- The problem you’ve noticed
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or drop us an email.
Floor joint sealing around St Denys
Across Southampton, floors range from older suspended timber floors to concrete slabs in newer homes and commercial units, and each moves in its own way. That’s why the skirting and threshold joints need a flexible seal.
Rented homes near St Denys station change hands often, and gaps at skirtings and thresholds are worth sealing between tenancies. If you look after a building such as St Denys Primary School, floor joints in corridors, halls and entrances take heavy wear and need resealing before the edges break up.
St Denys is about 1 mile north-east of Southampton, in Southampton. We provide floor joint sealing to homeowners, landlords and businesses in St Denys and nearby. St Denys is one of 40 places in Southampton we cover.
All of SO17, SO18 and SO14 is covered for floor joint sealing, from the main roads to the quietest streets. You will find streets such as Ivy Road, Lawn Road and Kent Road. You will find St Denys on the A335 and A3035, so it’s easy for us to get to with everything needed for floor joint sealing. Other places close to St Denys include Portswood (1 mile north-west), Bitterne Manor (1 mile south-east), Southampton (1 mile south-west), Bitterne Park (1 mile east) and Inner Avenue (1 mile south-west). Further out, we also cover Maybush (3 miles west), Coxford (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Millbrook (3 miles west) and Weston (3 miles south).
Near you in St Denys
Around St Denys, our work takes us to homes and buildings near South Western Arms, Riverside Park and St Mary's Independent School. St Denys has its own railway station: St Denys station. Nearby you will also find Royal South Hants Hospital (0.9 miles south-west) and Marlands Shopping Centre (1.5 miles south-west). For a walk, there’s Netley Common.
Landlords, agents and businesses in St Denys
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Why deal with it now?
Filling a skirting gap with caulk looks fine at first, so the gap reappears. A flexible sealant stretches instead. In a smaller place like St Denys, 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.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in St Denys
- Colour picked to suit the job
- A choice of colours where the product allows
- Sanitary silicone with an anti-fungal additive in wet areas
- Over 20 years’ experience
Take a look at what affects the cost and our reviews.
When it isn’t the sealant
We’ll always be straight with you, so here’s what sealant cannot fix:
- Leaks from a failed tanking system
- Structural movement or subsidence
- Subfloor problems that need a flooring contractor
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Thresholds
- Concrete floor joints
- Tiled floors
- Commercial floors
- Wet room & bathroom floors
- Skirting boards
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The process
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a morning or an afternoon for most homes. A visit to St Denys is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by looking at the floor, the gap and the traffic, then choose the product.
- Whatever is in the joint now, whether caulk, grout or sealant, comes out.
- The joint is cleaned, vacuumed and backed where depth needs controlling.
- A flexible sealant, or a floor-joint sealant for concrete, is applied in a colour to suit.
- Finally we tool it smooth and explain when the floor can be used and cleaned.
Preparing for the visit
- Clear the area around the work
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.