Caerphilly · Wales
Bath & shower resealing (mastic) in Trethomas, Caerphilly
Local bath resealing for Trethomas: a fixed quote from photos, a tidy visit and a one-year guarantee.
- Silicone smeared on tiles
- Gaps by the taps
- Mould you cannot clean out
Bath resealing in Trethomas without replacing anything
A good reseal is all about preparation: old silicone removed, mould treated, the joint cleaned and dried. Only then does the new sealant go on, as one neat, continuous bead. Whether it’s a messy previous reseal and gaps in the seal, we can typically put it right.
You’re covered after we leave: our one-year guarantee applies to every job, and we explain what it covers before you book.
- Location
- Trethomas (CF83)
- Region
- Caerphilly
- Cover
- One year on every repair
- Quotes
- Free, fixed quote from pictures
- Phone
- 0345 017 0787
- Page updated
- 23 October 2026
Keeping it looking good
Simple care helps the repair last. Our advice:
- Run the extractor fan during and after showers
- Reseal at the first sign of lifting
- Dry the seal after bathing
- Do not stand toiletries on the seal
Leave the sealant to cure for the time we give you, normally about a day.
Don’t wait until water gets behind the bath. Split or lifting sealant is a sign it’s time.
Is resealing worth it?
A reseal is one of the cheapest bathroom jobs there is, and it protects everything around the bath. Leaving failed sealant can let water cause damage that costs far more to fix. Rather than charging by the hour, we fix the price before we start. Damage, material and access decide it, and combining items on one visit brings it down.
Why Trethomas clients choose us
- A fixed quote before you book
- Typically one visit, start to finish
- Rooms protected and left tidy
- One price list for the entire UK
Take a look at our full price list.
When to call us in Trethomas
Black mould is the most common reason people reseal. It grows into the sealant itself, so cleaning cannot get it all out.
Contact us if you’ve noticed:
- Silicone smeared on tiles
- Mould you cannot clean out
- Leaks at the edges
- Gaps in the seal
Before booking anyone
- What protection goes down before work starts
- How long the guarantee is and what it covers
- If travel is included in the price
- Whether they match the colour on site
For landlords and businesses
We’re used to working with agents and managing companies. Send the address, pictures and access details.
Rental properties take more wear, and replacing items every time a tenant leaves is expensive. A repair between tenancies is a cheaper way to keep the property in good order.
The process
Nothing needs to be moved out of the room. We bring everything we need with us, put protection down and get going once we’ve agreed what we are doing. It typically takes around two hours, and you’re welcome to carry on with your day while we work.
- The old silicone is cut out completely.
- Residue is removed and the joint cleaned.
- We treat mould and dry the joint thoroughly.
- We fill the bath, or weight the tray, to open the joint.
- New mould-resistant silicone is applied and tooled neatly.
Preparing for the visit
- Tell us about parking, stairs or access
- Have a window or extractor fan available
- Have somewhere for us to park nearby if possible
How to get a price
Call 0345 017 0787 or use the quote form. With one close-up and one wider picture, we can give you a fixed price the same day in most cases.
Read more
Places near Trethomas
Other services in Trethomas
What a repair cannot fix
Honesty matters more than a booking, so here’s what a repair won’t do:
- Tiles that move, until they’re refixed
- Gaps too big for silicone alone
- Movement in the bath or tray
Send us photos and we’ll tell you honestly.
Surfaces we repair
- Wet rooms
- Shower trays & enclosures
- Basins & vanity units
- Kitchen worktops & sinks
- Baths
What bath resealing costs
Quotes are free and the price is fixed. What we look at:
- The material
- Whether we combine several jobs
- Access to the area
- The size and number of damaged areas
What it costs depends on how much damage there is and what kind, the material and how many jobs we combine into one visit. We give a fixed price from your photos, so you know the cost before booking.
How to get a fixed quote
You can take the pictures on your phone. Just make sure we can see:
- The material, if you know it
- Something in shot to show the size
- A clear, close picture of the problem area
- Natural light rather than flash
For most jobs, pictures are all we need to give you a price. Tell us what happened and where you are, and we’ll send back a fixed quote and some dates.
What your bath or shower is made of matters
Baths
Baths are resealed with water in them, so the joint is at its widest.
Shower trays
Trays are sealed with weight on them, for the same reason.
FAQs for Trethomas
What happens if you find more damage?
We’ll show you and explain before doing anything extra. Nothing extra is done without your say-so.
Why does my sealant keep going mouldy?
Generally poor ventilation and moisture sitting on the joint. We use mould-resistant silicone, and ventilation helps it last.
Which areas do you work in?
Across the UK, and that includes Trethomas. Prices do not change with location.
My seal keeps tearing. Why?
Generally because the bath or tray moves. We fill the bath before sealing it.
Is it messy?
We protect the room with dust sheets and masking first, and we clean up when we have finished.
How soon can you come?
We will give you dates with your quote. If it’s urgent, say so and we’ll do what we can.
Can new silicone go over old?
All the old sealant comes out. Fresh silicone doesn’t stick to old.
Are you accredited?
We’re accredited with CHAS, Constructionline, SafeContractor, SMAS Worksafe and Builder’s Profile.
Covering Trethomas
Trethomas is about 2 miles east of Caerphilly, in Caerphilly. Clients in Trethomas get the same service as everywhere else we cover: a fixed quote from photos, and a technician at your door on the day. We work in 94 places in Caerphilly.
We cover every part of the CF83 postcode area and the streets around it. From Heol yr Ysgol, Ashgrove and The Avenue or anywhere nearby, we can come to you. Close by, we cover Craig-y-Rhacca (1 mile east), Graig-y-Rhacca (1 mile east), Garth Place (1 mile south-east), Waterloo (1 mile east) and Machen (2 miles east). Further out, we also cover Blackwood (5 miles north), Risca (4 miles east), Ystrad Mynach (4 miles north-west), Cefn Fforest (5 miles north), Pontllanfraith (4 miles north) and Trecceln (6 miles north).
What’s near Trethomas
Around Trethomas, we work in homes near Church Of St Barrwg, Ty Yn y Pwll Inn and Bedwas High School. The nearest railway station is Energlyn & Churchill Park station, about 2 miles west. Other landmarks nearby include Risca Industrial History Museum (3.8 miles east) and Rhyd-y-gwern (1.9 miles east). The countryside around Trethomas includes Mynydd y Grug.
About our accreditations · Every repair comes with a one-year guarantee.
