Cornwall · England
Bath & shower resealing (mastic) in Trethewey, Cornwall
Bath, shower and sink resealing with new mould-resistant silicone in Trethewey, carried out at your home and guaranteed for a year.
- Unsealed corners
- Sealant that is split or lifting
- Black mould in the sealant
Bath resealing in Trethewey without replacing anything
Resealing is one of the simplest ways to protect your bathroom. Failed sealant lets water get where it shouldn’t, and resealing puts a stop to that. We regularly repair basins & vanity units, baths and wet rooms, and people most often call us about an untidy old seal and missing sealant behind the taps.
Every job is backed for twelve months. If something goes wrong with the work, we come back.
- Where
- Trethewey (TR19)
- Region
- Cornwall
- Warranty
- A year, on every repair
- Quote
- Free and fixed, from your photos
- Phone
- 0345 017 0787
- Updated
- 23 October 2026
Where we work around Trethewey
Trethewey is about 7 miles south-west of Penzance, in Cornwall. Jobs in Trethewey are booked in like any other job: a fixed quote from pictures, then a visit to do the work. We work in all 644 towns and villages across Cornwall.
Here we cover the TR19 postcode area. From The Valley and Crossfields or anywhere nearby, we can come to you. We also travel to Bottoms (1 mile north-east), Polgigga (1 mile west), Porthcurno (1 mile south), Treen (1 mile east) and St Levan (1 mile south). We also work in nearby towns such as Penzance (7 miles north-east), Hayle (14 miles north-east), St Ives (13 miles north-east), Porthleven (15 miles east), Newlyn (6 miles north-east) and Carbis Bay (13 miles north-east).
Around Trethewey
Locally, our jobs take us to homes close to St Levan Primary School and St Levan's Church and the streets around them. A little further out are Museum of Global Communications (0.9 miles south). Open spaces near Trethewey include Chapel Carn Brea.
More services for Trethewey
Common problems we fix in Trethewey
Sealant doesn’t last forever. Every bath or shower adds moisture and soap residue, which mould feeds on, and the joint flexes each time the bath fills.
It’s worth getting a quote if you see:
- Unsealed corners
- Leaks at the edges
- Silicone coming away from the tiles
- Discoloured, yellow sealant
What to look for in a quote
- Whether the price covers travel
- How your room will be protected
- Aftercare advice
- What prep work is covered
Trethewey questions
What happens if you find more damage?
It’s rare, but if it happens we talk to you first. You decide whether to go ahead.
Do you do work for letting agents?
Yes, frequently. We can quote for several properties together and work between tenancies.
Is it safe with children and pets around?
Yes, as long as they stay out of the room we are working in. We’ll tell you when the room can be used again.
Why does my sealant keep going mouldy?
Usually poor ventilation and moisture sitting on the joint. Mould-resistant silicone and good ventilation help.
Is a repair better than a new one?
In most cases, yes. A repair skips the removal, fitting and redecorating. If it isn’t worth repairing, we will tell you.
Will it make a mess?
Dust sheets and masking go down before we start, and tidy up before we leave.
Do you cover the whole of Cornwall?
The entire UK, including all of Cornwall. Send your postcode with your pictures and we will offer you dates.
Can you price it without visiting?
In nearly every case. We only ask to see it in person if the pictures can’t show what we need.
When we would advise against a repair
To be straight with you, some problems need a different fix:
- Movement in the bath or tray
- Tiles that move, until they’re refixed
- Hidden water damage
Not sure? Send pictures and we’ll give you a straight answer.
Materials we work on in Trethewey
- Wet rooms
- Baths
- Kitchen worktops & sinks
- Basins & vanity units
- Shower trays & enclosures
The process
From the moment we arrive, the aim is to do the job without disturbing the rest of your home. Surfaces nearby are masked off, the work takes about two hours for a bath, depending on what we find, and we finish with a tidy-up and a look at the finished work together.
- All the old sealant is cut out and removed.
- We clean the joint and treat any mould.
- We dry the joint thoroughly.
- Baths are filled with water first, so the joint is at its widest.
- New mould-resistant silicone goes on and is tooled to a neat finish, including around the taps.
How to prepare
- Tell us about any previous repairs or coatings
- Keep pets and children out of the room while we work
- Move bottles, mats and clutter away from the area
Getting a price
Getting a quote takes a couple of minutes: photograph the damage, then the whole bath or shower, add your postcode and send them to us. You’ll get a fixed quote, not an estimate.
Related advice
Keeping it looking good
Nothing complicated is needed, just a few sensible habits:
- Ventilate the bathroom well
- Store bottles on a shelf
- Wipe the joints dry after use
- Replace the seal when mould sets in
Let it cure fully before using the bath or shower, normally about a day.
Black mould in sealant isn’t just unsightly, it’s a sign moisture is sitting in the joint. Resealing early keeps water out of the walls and floor.
For landlords and businesses
Hotels, guest houses and holiday lets can’t afford rooms out of action for long, so we keep visits short and tidy. We can work around your bookings.
For anyone letting property in or around Trethewey, we can repair and quote for several addresses together. Send pictures for each one and we will come back with a combined price.
Why it’s worth resealing in Trethewey
Putting new silicone over old does not last. It peels within weeks, and traps mould underneath. We remove the old sealant completely. The price reflects the work involved, not your postcode. The full price is agreed before you book.
Why choose Surface Doctor in Trethewey
- Normally one visit, start to finish
- Rooms protected and left tidy
- Same prices wherever you are
- No need to remove anything
Read our full price list.
Different materials, different repairs
Shower trays
Trays are sealed with weight on them, so the joint is at its widest.
Sinks and worktops
We reseal basins, vanity tops and kitchen worktops, once the joint is completely dry.
DIY kit or professional repair?
If you do try a kit, read the instructions carefully, ensure the area is clean and completely dry, and give it the full curing time. If it fails, we can still put it right.
DIY kits are sold for most surfaces, and they can make a small mark look better. Where they fall down is colour and preparation: kits come in a few standard shades, and without proper cleaning and keying the filler often lifts.
About our accreditations · Every repair comes with a one-year guarantee.
