Caerphilly · Wales
Bath & shower resealing (mastic) in Deri, Caerphilly
Bath, shower and sink resealing with new mould-resistant silicone for householders, landlords and businesses in Deri. Free, fixed quotes from your pictures.
- Mould you cannot clean out
- An untidy old seal
- Discoloured, yellow sealant
Bath resealing at your home in Deri
Baths are resealed with water in them, so the joint opens fully, so the seal doesn’t tear when the bath is first used. Typical jobs include an untidy old seal and sealant that’s split or lifting, in shower trays & enclosures, basins & vanity units and kitchen worktops & sinks.
Your repair is guaranteed for a year, as with every job we do.
- Where
- Deri (CF81)
- Region
- Caerphilly
- Cover
- One year on every repair
- Quotes
- Free, fixed price from pictures
- Call
- 0345 017 0787
- Page updated
- 23 October 2026
What we’re called out for in Deri
Joints split if the bath or tray moves, often because it was sealed with the bath empty.
Send us a photo if you notice any of these:
- Damp near the bath
- Silicone smeared on tiles
- Mould you can’t clean out
- Stained silicone
What your quote should include
- What the guarantee covers, and for how long
- What preparation is included
- Whether there are any call-out or travel charges
- Aftercare advice
When we would advise against a repair
Before booking, it’s worth knowing the limits:
- Gaps too big for silicone alone
- Water damage behind the bath that needs a builder
- Loose tiles, which need refixing first
Send us pictures and we will tell you honestly.
Materials we work on in Deri
- Kitchen worktops & sinks
- Baths
- Shower trays & enclosures
- Wet rooms
- Basins & vanity units
Prices and what affects them
You will not pay by the hour. The price depends on:
- The colour and finish to match
- How many areas need work
- What kind of damage it is
- Any earlier repairs that need removing first
It helps to know what pushes a price up or down: access, material, the extent of the damage and whether we can do several items together. Send photos and you’ll get a fixed figure.
How to get a fixed price
Photographing the damage takes a minute, and it saves a visit. Try to send:
- The material, if you know it
- Good light, ideally daylight, without flash glare
- A clear, close picture of the problem area
- A wider photo showing the whole bath or shower
A quote takes minutes to ask for: take one close-up and one wider shot of the bath or shower, include your postcode and send them to us. What comes back is a fixed price, not a guess.
Towns and villages near Deri
Also in Deri
Questions from Deri
Do you work for landlords and businesses?
Yes, often. We can quote for several properties together and work between tenancies.
What happens if you find more damage?
It’s rare, but if it happens we talk to you first. The price only changes if you agree.
Can new silicone go over old?
We always remove the old sealant completely. Fresh silicone doesn’t stick to old.
When can I use the bath after resealing?
You’ll get the curing time from us, generally around a day.
Why does the silicone keep cracking?
The bath or tray is probably flexing. Persistent splitting can mean the support needs attention.
How do I book?
A close-up, a wider photo and your postcode. Then we’ll agree a date.
Does someone need to be in?
Someone needs to let us in and show us the job. You don’t need to watch us work.
Is it OK to have pets in the house?
Just keep them out of the work area. We will tell you when the room can be used again.
How the visit works
There is not much you need to do on the day. Show us the job, point us to the room, and we’ll get on with it. Most visits take about two hours for a bath, tidy-up included.
- We cut out and remove all of the old sealant.
- Next we clean the joint and deal with mould.
- We dry the joint thoroughly.
- For a bath, we fill it with water first so the joint is at its widest.
- New mould-resistant silicone goes on and is tooled to a neat finish, taps included.
Preparing for the visit
- Have somewhere for us to park nearby if possible
- Mention any parking restrictions or tricky access
- Mention if the room is upstairs or in a flat
Get a quote
Pricing is simple: snap the damage close up and then the entire item, send them over with your postcode, and you will get a fixed price back. Quotes are free and you are under no obligation.
Advice
For landlords and businesses
Hotels, guest houses and holiday lets need rooms back in use quickly, so we keep visits short and tidy. We can work around your bookings.
Landlords, letting agents and housing providers in Deri use us as well as homeowners. Repairing between tenancies keeps void periods short, and it generally costs far less than a refit.
Why it’s worth resealing in Deri
Compared with repairing water damage, resealing is cheap. It’s quick, tidy and protects your home. Rather than charging by the hour, we fix the price before we start. Damage, material and access decide it, and doing several items at once reduces it.
Why choose Surface Doctor in Deri
- Rooms protected and left tidy
- Every repair guaranteed for a year
- Most jobs done in one visit
- Fixed prices from your pictures
Take a look at our pricing.
Materials and what they mean for the repair
Baths
We fill the bath before sealing, so the joint is at its widest.
Sinks and worktops
Basins, vanity units and kitchen worktops are resealed too, with the joint fully dried first.
About Deri
Deri is about 5 miles south of Tredegar, in Caerphilly. Customers in Deri get the same service as everywhere else we cover: a fixed quote from pictures, then a visit to do the work. Our repair technicians cover 94 places in Caerphilly. Our nearest city page is Birmingham, about 79 miles away.
Jobs in CF81 are booked in the same way as anywhere else. You’ll find streets such as Chapel Street, Mill Road and Riverside Walk, and we cover them all. Neighbouring places we cover include Tir-Phil (1 mile north-east), New Tredegar (1 mile north-east), Cwmsyfïog (1 mile east), Brithdir (2 miles east) and Abertysswg (2 miles north). Larger places within reach include Caerphilly (9 miles south), Blackwood (4 miles south-east), Risca (10 miles south-east), Ystrad Mynach (4 miles south), Cefn Fforest (4 miles south-east) and Pontllanfraith (5 miles south-east).
What’s near Deri
We visit homes around Heolddu Comprehensive School, Deri Primary School and Bailey Arms Hotel. Deri’s nearest station is Tir-Phil station, roughly 1.1 miles north-east of the centre. A little further out are Twyn Castell (3.1 miles south) and Festival Park (4 miles north-east). Green spaces nearby include Craig y Felin.
DIY kit or professional repair?
It’s tempting to reach for a kit, but the repairs we redo most often are DIY ones that have discoloured or lifted. Getting it right first time is normally cheaper.
A DIY attempt is not a disaster. We remove the old filler and start again, so it does not stop a professional repair. Just mention it when you send photos, as it can add time.
About our accreditations · Every repair comes with a one-year guarantee.
