Caerphilly · Wales
Bath & shower resealing (mastic) in Gelli-groes, Caerphilly
Bath, shower and sink resealing with new mould-resistant silicone for homeowners, landlords and businesses in Gelli-groes. Send pictures for a free, fixed quote.
- Mould you cannot clean out
- Water getting behind the bath or tray
- Sealant that’s split or lifting
Resealing in Gelli-groes: why it matters
Compared with repairing water damage, resealing is cheap. It’s a quick job that protects your walls and floors. A few things move the price: access, material, the extent of the damage and whether we can do several items together. Photos let us give you a fixed figure.
Why choose Surface Doctor in Gelli-groes
- Nothing taken out or refitted
- Honest advice, even when it means no job
- One price list for the whole UK
- CHAS, Constructionline and SafeContractor accredited
See our full price list.
How we handle bath resealing in Gelli-groes
Baths are resealed with water in them, so the joint opens fully, which stops the new seal tearing the first time the bath is used. If you’re dealing with old sealant that looks dirty and black mould in the sealant, we can normally put it right.
The work is guaranteed for twelve months. If something is not right in that time, we come back and put it right.
- Area
- Gelli-groes (NP12)
- Area hub
- Caerphilly
- Warranty
- 12 months on all our work
- Price
- Free and fixed, from your photos
- Call
- 0345 017 0787
- Last updated
- 23 October 2026
Gelli-groes: your questions answered
Can you redo someone else’s repair?
Yes, we often do. Removing the old work can add time, and that’s in the quote.
Is there any odour?
It depends on the job, but often a little. Open windows and an extractor fan help.
Is it worth repairing rather than replacing?
In most cases, yes. Replacement brings removal, refitting and making good, which a repair avoids. If it is not worth repairing, we’ll tell you.
How do I get a price for bath resealing in Gelli-groes?
We give a fixed quote from your photos. Send a close-up of the damage and a wider photo with your NP12 postcode.
Are you a vetted contractor?
We hold CHAS, Constructionline, SafeContractor, SMAS Worksafe and Builder’s Profile accreditations.
My seal keeps tearing. Why?
Movement is the usual cause, or it was sealed with the bath empty. We fill the bath before sealing it.
Which areas do you work in?
All of Caerphilly, and the rest of the UK. There is no extra charge for travel.
Do you come to Gelli-groes?
We do. We send a technician to Gelli-groes for every job, with no extra charge for travel.
Aftercare tips
Nothing complicated is needed:
- Clean the sealant gently and regularly
- Run the extractor fan during and after showers
- Keep the joints dry
- Store bottles on a shelf
Run the extractor fan, dry the joints after bathing, and clean them regularly with a mild cleaner to slow mould growth.
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.
Places near Gelli-groes
Other services in Gelli-groes
Repairs by material
Baths
Baths are resealed with water in them, to open the joint fully.
Sinks and worktops
Basins, vanity units and kitchen worktops are resealed too, once the joint is completely dry.
Common problems we fix in Gelli-groes
Sealant splits when the bath or tray moves, often because it was sealed with the bath empty.
Clients generally contact us about:
- Water getting behind the bath or tray
- Black mould in the sealant
- Gaps by the taps
- A messy previous reseal
Comparing quotes
- If travel is included in the price
- How the room is protected while they work
- When it can be used again
- What prep work is covered
Gelli-groes and nearby
Gelli-groes is about 1 mile south of Blackwood, in Caerphilly. We travel to homes and businesses in Gelli-groes, so nothing has to leave your home. We cover all 94 towns and villages in Caerphilly, from the larger towns to small villages. Our nearest city page is Birmingham, about 79 miles away.
Postcode districts we cover here: NP12. Local streets include Bryn Lane, Bryn Road and Tram Road. Gelli-groes sits on or near the A472, which makes travel easy. Neighbouring places we cover include Penllwyn (1 mile north-west), Pontllanfraith (1 mile north), Wyllie (1 mile south), Woodfieldside (1 mile north) and Pentwyn-mawr (1 mile north-east). Further out, we also cover Caerphilly (5 miles south), Risca (5 miles south-east), Trecceln (3 miles north-east), Newbridge (3 miles north-east), Beddau (5 miles south) and Trecenydd (5 miles south).
Landmarks near Gelli-groes
Our customers here include homes close to Bryn Primary School, Siloh Presbyterian Church and Halfway House, among other places. The closest station to Gelli-groes is Hengoed station, roughly 1.4 miles west. A little further out are Ysbyty Ystrad Fawr (2 miles south-west) and Llancaiach Fawr Living History Museum (4 miles west). Open spaces near Gelli-groes include Mynydd y Lan.
Can I fix it myself?
You can buy a DIY kit for most repairs, 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 frequently lifts.
It’s natural to want to try a repair yourself. The trouble is that kit repairs frequently look fine at first and then fail, and the old filler has to come out before a proper repair.
How we price bath resealing
Prices are worked out job by job, from your photos. What matters most is:
- How hard the colour is to match
- The size and number of damaged areas
- Doing more than one item at once
- Whether it’s a chip, crack, burn or wear
There are no surprise extras on the day. What we quote from your pictures is what you pay, and if the damage turns out to be different, we discuss it before starting.
Quotes from your photos
You can usually get a fixed quote without us visiting. To make it quick:
- Daylight if possible, and no flash reflection
- A close-up of the damage, in focus
- Whether it’s been repaired or coated before
- What it’s made of, if you know
If you’re in Gelli-groes and want a price, the easiest route is pictures: one close up, one from further back, plus your postcode. You will get a fixed quote with dates to choose from.
Landlords, agents and businesses in Gelli-groes
Rented homes see more wear and tear, and replacing things at every changeover adds up. A repair between tenancies is a cheaper way to keep the property in good order.
We also carry out snagging repairs for builders and developers, putting right damage done during fitting. We are CHAS, Constructionline and SafeContractor accredited.
How the visit works
Your technician turns up when we said we would, introduces themselves and checks the damage against your photos first. The floor and nearby surfaces are covered before any work starts. The work itself takes around two hours, and we leave the room as we found it.
- We protect the area and mask the joint lines.
- Old sealant and residue are removed.
- The joint is cleaned, treated and dried.
- We run a continuous bead of new silicone.
- We smooth the bead, remove the tape and leave it to cure.
Getting ready for the visit
- Open a window if you can
- Avoid using the area for a few hours before we arrive
- Clear the area around the damage
Get a quote
A quote takes minutes to ask for: photograph the damage, then the entire bath or shower, add your postcode and send them to us. What comes back is a fixed quote, not a guess.
Related advice
About our accreditations · Every repair comes with a one-year guarantee.
