Southampton · England
Floor & skirting joints in Thornhill, Southampton
We cover Thornhill for sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Floor edges that trap water and grime
- Skirting caulk that keeps splitting
- Cracked grout where a tiled floor needs a movement joint
Quotes for floor joint sealing in Thornhill
You’ll get a clear quote before work begins. It takes into account:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Helping us quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- The address or postcode of the job
- Pictures of the joints, sent by email
- Whether it’s a home or a business
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Floor joint sealing in Thornhill
Tiled floors can crack along the grout when there’s no room for movement. Where one is needed, we rake out the grout along the right line and replace it with flexible sealant coloured to suit the grout. Typical jobs include skirting that has pulled away from the floor and gaps between floors and kitchen plinths, on skirting boards, commercial floors and thresholds.
For a new home in or near Thornhill, it’s worth checking the sealant early. Common snags include open skirting joints, lifting shower seals and gaps around frames.
You get a one-year guarantee, the same in Thornhill as everywhere else we work.
- Where
- Thornhill (SO19, SO18, SO30)
- Wider area
- Southampton
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Skirting boards
Gaps between skirting and floor open as timber and floors move. We seal them with a flexible sealant rather than caulk.
Concrete floor joints
Hard wheels break down the edges of open joints. Sealing them supports the edges and stops debris collecting.
Common questions in Thornhill
Can you help a landlord with a rental near Sholing station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Thornhill?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
When can I walk on the floor?
It depends on the product and the conditions. Before we leave, we tell you when it can be walked on, mopped and driven over so you can plan.
Do you seal kitchen plinths to the floor?
Yes. The old joint comes out and a flexible silicone replaces it.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Do you offer different sealant colours?
In most cases you can choose. We’ll explain which colours are available.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Lift furniture rather than dragging it across joints
- Do not paint over silicone
- Get cracks along tile grout lines looked at early
- Keep caulk for dry, still joints only
In commercial units, keep pallet trucks and heavy wheels off new joints until they’ve cured. Mark the area off so drivers avoid it until it’s ready.
Cracks along tile grout lines come back unless the movement is dealt with. A flexible joint added early helps protect the tiles themselves.
What happens if it’s left?
Regrouting a cracked line in a tiled floor rarely fixes it. If the floor needs to move there, the grout will crack again. Replacing that line with flexible sealant gives it somewhere to go. Homes in smaller places like Thornhill can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Why choose Mr Mastic in Thornhill
- Over 20 years’ experience
- 180+ five-star Google reviews
- Fully insured
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost or what customers say.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours, depending on the length of joint, and the area is left clean. In a smaller place like Thornhill, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- First we check the joint and the floor and agree which sealant suits it.
- Old caulk, grout or sealant is removed from the joint.
- We clean and vacuum the joint and fit backing where the depth needs setting.
- We apply a flexible sealant, or a floor-joint product on concrete, in a suitable colour.
- Finally we tool it smooth and explain when the floor can be used and cleaned.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
Getting a quote
If you’re in Thornhill and need floor joint sealing, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
What floor joint sealing looks like in Thornhill
Floors around Southampton run from suspended timber in older homes to concrete in newer houses and units, and they do not all move the same way. That’s why the skirting and threshold joints need a flexible seal.
Schools such as Thornhill Primary School are buildings too, and entrance and corridor floor joints take a lot of traffic. For landlords with property near Sholing station, open skirting and floor joints collect dirt and water, so seal them while the property is empty. If you look after a church, hall or community building such as St Christopher, floor and skirting joints in halls and kitchens wear like any others.
Thornhill is about 2 miles east of Southampton, in Southampton. If you need floor joint sealing in Thornhill, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Southampton from our Crawley base, Thornhill included. Our area takes in 40 places across Southampton.
We cover every part of the SO19, SO18 and SO30 postcode area for floor joint sealing and the streets around it. That includes homes and businesses on Drove Road, Barry Road and Luton Road and the roads around them. Thornhill is on the A334, so it’s easy for us to get to with everything needed for floor joint sealing. Close by, we work in Harefield (1 mile north), Sholing (1 mile south-west), Bitterne (1 mile west), West End (1 mile north) and Chartwell Green (1 mile north). Within a short drive, we also cover Shirley (4 miles west), Regents Park (4 miles west), Maybush (5 miles west), Portswood (3 miles north-west), Coxford (5 miles west) and Freemantle (4 miles west). Thornhill is among the bigger towns we cover in Southampton.
Near you in Thornhill
In Thornhill, that means homes and buildings near Westwood Woodland Park, Woodlands Community College and Grove Park Business and Enterprise College. The closest station to Thornhill is Sholing station, about 1.4 miles south-west. A little further out are Moorgreen Hospital (1.4 miles north-east) and Bitterne Local History Society Heritage And Research Centre (1.1 miles west). Open spaces near Thornhill include Netley Common.
Towns and villages near Thornhill
What else we do in Thornhill
Landlords, agents and businesses in Thornhill
We work for landlords and letting agents as well as householders. Sealant work between tenants keeps a property looking cared for.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
When something else is needed
It helps to know what we can’t do:
- A tiled floor that needs relaying
- Failed waterproofing under a wet room floor
- Damaged concrete that needs breaking out and repairing
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Joints and surfaces we work on
- Wet room & bathroom floors
- Commercial floors
- Skirting boards
- Concrete floor joints
- Tiled floors
- Thresholds