Interior
The nave has a C15-style barrel-vaulted wood-panelled roof of 3-and-a-half bays, divided by hammerbeam trusses with billetted decoration; wall-posts on stone corbels, the hammerbeams supporting large carved wooden angels. Three-bay C15 arcade to N aisle, continuous 4-centred arches on square piers, all plastered and whitewashed. Tall pointed tower arch of narrow stone voussoirs, unplastered. The tower chamber has a vaulted plastered ceiling with central opening for bell ropes; small doorway with monolithic lintel with triangular head to N side leading to stair turret; quarry tile floor with inlaid slate tablet recording a restoration of the tower and spire in 1983-5. Perpendicular octagonal font to NW corner of nave, of white marble with pairs of blind trefoiled arches to each face; octagonal stem and base. It was apparently removed from the church in the C16 and replaced in 1660. Central aisle with quarry tile floor flanked by wooden pews with carved bench ends. To SE, pulpit with polygonal wooden front on stone base.
The N aisle has a lean-to wooden roof with arched braces supported on stone corbels; the C19 dormer windows form part of this roof structure. A 4-centred arch to the E end leads to the organ recess. Fold-up benches against aisle wall.
The 4-centred chancel arch is in the same style as the arcade; rood screen of 1878, a reconstruction of the original, of decorative openwork, including central opening with Tudor arch and flanking bays with traceried heads. Beneath the brattishing is a foliate frieze from the original medieval screen. The chancel has a 3-bay hammerbeam roof, similar to nave but more ornate; roll mouldings to arched-brace trusses, cusped windbraces and struts. It also has carved wooden angels supported on the hammerbeams. To the L, is a 3-bay arcade to vestry, C19 in C15 style, the heavily moulded and decorated Tudor arches on octagonal piers with ringed capitals and bases. The L arch is narrower and leads to the organ recess. Choir stalls with decorated bench ends, 1 step up to altar with encaustic and quarry tile floor; altar rail with iron scrollwork and brass handrail; wood panelled reredos with decorated openwork panels.
Much of the stained glass relates to the Lloyd family of Clochfaen and is by Burlison and Grylls, 1878. The E window shows St Curig holding a church. To the S chancel and nave, the windows have a series of heraldic shields relating to the Lloyd family ancestors, dating from 1197 until 1781. In the nave, the central lights contain depictions of St Michael and St Timothy, with heraldry to the outer lights. Similar subject matter to W end window but the upper lights contain glass which is probably medieval. The N nave windows include depictions of the Virgin and child, and St Michael.
Memorials: to the arcade, marble tablets, to JR Pryse of Pant y drain, who died in the Boer War in 1900, and below, a tablet to John Rhys Pryse, probably his father. To the R is a World War I memorial tablet with roll of honour. In chancel, early C20 marble tablet to Elizabeth Bennett Evans (d. 1923), church organist, and another to Jane Bennett Evans (d. 1937). On S wall of nave a series of small brass tablets, C19 to early C20, some to the Lloyd Verney family of Clochfaen.