From West Wales
Head for Llandovery and take the A40 to Sennybridge. On leaving Sennybridge turn right onto the A4067 (Swansea)
After approximately 1 mile - just after the road descends - turn left onto the A4215 Cardiff (if you pass The Tanners Arms public house you have missed the turning by 100 meters).
After 1 mile the sign for 'Tylegarw' will be seen on your right at a junction marked 'Heol Senni' just as you are about to climb a long, steep hill.