Gutter Glossary Dublin | 15 Guttering & Roofline Terms

15 terms explained

Half-Round uPVC Gutter (112 mm): Standard rounded plastic gutter profile fitted to most post-1970 Dublin semi-detached and terraced homes.
Deep-Flow Gutter Profile: Higher-capacity semi-elliptical gutter trough that handles roughly twice the flow rate of standard half-round guttering on large roofs.
Ogee (Moulded) Gutter: Decorative S-curved front gutter profile with a wide flat back and high water capacity.
Continuous Aluminium Gutter: Coated aluminium guttering extruded from a van-mounted machine in a single jointless length to match the exact width of the eaves.
Cast-Iron Heritage Guttering: Heavy traditional iron gutters and downpipes fixed to period houses in Dublin, joined with bolted sockets and red-lead or mastic putty.
Parapet / Valley Box Gutter: A flat-bottomed timber trough lined with Code 5 or Code 6 lead, EPDM or fibreglass hidden behind a front parapet wall or between twin roofs.
Running Outlet: The gutter fitting with a vertical spigot underneath that connects the horizontal gutter trough to the top of the downpipe.
Union Bracket (Joiner Clip): The double-ended clip with rubber EPDM compression seals that joins two lengths of uPVC gutter and allows thermal expansion.
Swan-Neck Offset: Two angled bends that step the vertical downpipe inward from the overhanging gutter outlet to the face of the house wall.
Downpipe Shoe & Gulley: The angled kick-out fitting at the bottom of a downpipe that directs rainwater into the ground drainage gulley grating.
Fascia Board: The vertical board fixed to the ends of the roof rafters that carries the gutter brackets.
Vented Soffit Board: The horizontal board tucked under the fascia overhang with ventilation slots that let air into the attic space.
Eaves Support Tray (Felt Tray): A rigid plastic tray slipped under the bottom course of roof tiles or slates so rainwater drips cleanly into the centre of the gutter.
Fascia Bracket Spacing: The distance between support brackets along a gutter run (typically 800 mm to 1,000 mm on uPVC, closer where snow or heavy moss collects).
Two-Thirds VAT Rule (13.5%): Irish Revenue rule under which residential repair and installation work is taxed at 13.5% VAT when materials stay under two-thirds of the net bill.