Gwynedd · Wales
Bath & shower resealing (mastic) in Cwm-y-glo, Gwynedd
Bath, shower and sink resealing with new mould-resistant silicone for householders, landlords and businesses in Cwm-y-glo. Free, fixed quotes from your pictures.
- Black mould in the sealant
- Old sealant that looks dirty
- Silicone smeared on tiles
FAQs for Cwm-y-glo
Is there any odour?
There may be a mild smell during the work that clears as it cures.
What information do you need?
A close-up, a wider photo and your postcode. After that, we just agree a date.
Are you a vetted contractor?
Yes, including CHAS, Constructionline and SafeContractor. See our accreditations page for the full list.
Can new silicone go over old?
We always remove the old sealant completely. New silicone will not bond to old.
Can you repair something that’s been repaired before?
Yes, regularly. It can add a little time, which we include in the quote.
Do you work in Cwm-y-glo?
Yes, we do. We send a technician to Cwm-y-glo for every job, with no extra charge for travel.
Is repairing better than replacing?
Generally, when the rest is in good condition. A repair avoids removal and making good. We’ll tell you honestly if replacement makes more sense.
Do I have to be there?
Yes. The technician needs access to the room for the visit, at a time that suits you.
About our bath resealing in Cwm-y-glo
Resealing is one of the simplest ways to protect your bathroom. Failed sealant lets water get where it shouldn’t, and a new seal stops it. Whether it’s leaks at the edges and mould you can’t clean out, we can help, whatever the material.
Big or small, it’s backed by a one-year guarantee in Cwm-y-glo and across Gwynedd.
- Location
- Cwm-y-glo (LL55)
- Region
- Gwynedd
- Guarantee
- 12 months on all our work
- Price
- Fixed and free, based on pictures
- Phone
- 0345 017 0787
- Last updated
- 23 October 2026
Our work in Cwm-y-glo
Cwm-y-glo is about 6 miles south of Bangor, in Gwynedd. We agree a date that works for you, and we will give you an arrival time in advance, so you are not left waiting in all day. We work in 165 places in Gwynedd. We work right across the region, from Cwm-y-glo to Liverpool (54 miles away).
All of LL55 is covered, from the main roads to the quietest streets. We regularly work on streets such as Bryn Crwn, Allt Goch and Dol Afon and the roads around them. We also cover the places around Cwm-y-glo: Brynrefail (1 mile north-east), Penisa'r Waun (1 mile north), Pont-Rhythallt (1 mile north-west), Llanrug (1 mile north-west) and Glasgoed (1 mile north-west). Larger places within reach include Bangor (6 miles north), Caernarfon (4 miles west), Bethesda (5 miles north-east), Hirael (7 miles north), Upper Bangor (6 miles north) and Glanadda (6 miles north).
Landmarks near Cwm-y-glo
Around Cwm-y-glo, we work in homes near Y Fricsan (The Snowdon Inn). Nearby you’ll also find Quarry Hospital (2.3 miles south-east) and Ysbyty Gwynedd (4.8 miles north). Not far away are Llyn Padarn and Cefn Du.
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
We put weight on a tray before sealing it, for the same reason.
What happens on the day
We agree an arrival time beforehand, so you are not left guessing. On site, it takes a couple of hours for most jobs. We leave the room clean.
- We cut out and remove all of the old sealant.
- Next we clean the joint and deal with mould.
- We make sure the joint is completely dry.
- For a bath, we fill it with water first so the joint is at its widest.
- We run a new bead of mould-resistant silicone and smooth it neatly, including around the taps.
How to prepare
- Ensure the area is dry
- Have somewhere for us to park nearby if possible
- Tell us about any previous repairs or coatings
Ask for a price
You don’t need a survey visit. Photos are enough for us to price nearly every job: we need a close-up, a wider picture and your postcode, and we’ll come back to you with a fixed figure.
Read more
For landlords and businesses
Builders use us to fix snagging damage before handover, saving last-minute replacements. Several plots can be done in one visit to keep costs down.
Landlords, letting agents and housing providers in Cwm-y-glo use us as well as householders. Repairing between tenancies keeps void periods short, and it generally costs far less than a refit.
DIY kit or professional repair?
If you do try a kit, read the instructions carefully, and don’t use it until it has fully cured. If it fails, we can still put it right.
The difference between a kit and a professional repair is mostly in the preparation and colour. We prepare the area properly, mix the colour on site and polish the finish to match, then guarantee it for a year.
Also near Cwm-y-glo
Other services in Cwm-y-glo
What we’re called out for in Cwm-y-glo
Joints split if the bath or tray moves, frequently because it was sealed with the bath empty.
The things clients typically mention when they call include:
- An untidy old seal
- Discoloured, yellow sealant
- Leaks at the edges
- Mould you cannot clean out
What your quote should include
- Who will actually do the work
- Whether there are any call-out or travel charges
- What protection goes down before work starts
- What happens if they find more damage
Is resealing worth it?
Compared with repairing water damage, resealing is cheap. It’s quick, tidy and protects your home. Rather than charging by the hour, we price the entire job up front. It depends on the damage, the material and access, and combining items on one visit brings it down.
Why choose Surface Doctor in Cwm-y-glo
- CHAS and Constructionline accredited
- Straight answers about what a repair can do
- One-year guarantee on every repair
- Most jobs done in one visit
Take a look at our full price list.
Looking after it afterwards
Simple care helps the repair last. We recommend:
- Clean the sealant gently and regularly
- Store bottles on a shelf
- Use the extractor fan
- Air the room after use
Let it cure fully before using the bath or shower, generally around 24 hours.
Don’t wait until water gets behind the bath. Split or lifting sealant is a sign it’s time.
When we would advise against a repair
Some problems need a builder, plumber or fitter rather than us:
- Gaps too big for silicone alone
- Tiles that move, until they’re refixed
- A bath or tray that moves, until its support is fixed
Not sure? Send photos and we will give you a straight answer.
Materials we repair
- Baths
- Shower trays & enclosures
- Basins & vanity units
- Kitchen worktops & sinks
- Wet rooms
About our accreditations · Every repair comes with a one-year guarantee.
