- Anglesey Roofing Co
- 0845 3736639 - 390 High Street, Bangor, Gwynedd, LL57 1YT
- Derbyshire Aggregates
- 01248 361672 - Old Quarry, Cyttir Lane, Bangor, Gwynedd, LL57 4DA
- A Gallagher
- 01248 351886 - 227 Penrhos Road, Bangor, Gwynedd, LL57 2DJ
- G.B Hughes
- 01248 600633 - 2 Hen Aelwyd, Penrhyn Terrace, Bethesda, Bangor, Gwynedd, LL57 3NB
- Owens Slate Services
- 01248 605575 - 2 Tanysgrafell, Bethesda, Bangor, Gwynedd, LL57 4AJ
- Penrhyn Slate Crafts
- 01766 770525 - Berthen Eirin, Penrhyndeudraeth, Gwynedd, LL48 6NP
- Snowdonia Slate And Stone
- 01766 832525 - Bryn Myfyr Cwm Bowydd Rd, Blaenau Ffestiniog, Gwynedd, LL41 3ED
- Stormflex
- 01766 831112 - Glynafon Tanygrisiau, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3RS
- Thomas & Rowlands
- 0870 7574481 - 19 Brynteg, Beaumaris, Gwynedd, LL58 8HF
- Gwyn Rowlands
- 01766 780206 - Dol Aur, Harlech, Wales, LL46 2SS
- Owens Roofing
- 01758 720784 - Edern, Pwllheli, Gwynedd, LL53 6JD
- M Parry Roofing And Building
- 01248 811411 - 7 Rosehill, Beaumaris, N Wales, LL58 8EN
- Bethesda Slate Company Ltd
- 01248 355995 - Unit 14, Llandygai Industrial Estate, Bangor, Gwynedd, LL57 4YH
- Gwyndaf Pritchard Roofing Ltd
- 01248 716562 - 2 Tyn Rhos, Llanfairpwllgwyngyll, Gwynedd, LL61 5QH
