Frequently asked questions about the Sheet rainwater systems category
What are Sheet rainwater systems and what are they used for?
Sheet rainwater systems are roof drainage products made from sheet steel, including gutters, downpipes and fittings for collecting and directing rainwater from roofs. Typical items include RUUKKI RENN 4M 125 ÜMAR and TORU 2,5M 90 ÜMAR plus bends, angles and brackets to ensure size and colour compatibility.
How to choose between 125 mm and 90 mm round profile?
Choose 125 mm round profile for larger roof areas because it carries more water; 90 mm suits smaller roofs and lighter drainage needs. Check RUUKKI items (RENN 125 ÜMAR, TORU 90 ÜMAR) and size according to roof catchment area.
What components are needed to assemble a system from gutter to downpipe?
A basic kit includes gutter sections (RENN 3M/4M 125 ÜMAR), gutter brackets (RENNIKONKS), end caps and joiners (RENNIOTS, RENNIJÄTK), downpipe sections (TORU 1.0M/2.5M/4.0M 90 ÜMAR), bends (PÕLV) and pipe clamps (TORU KLAMBER). RUUKKI parts are sized to be compatible.
Can I use RENNIOTS COMBI for 125 mm gutter?
Yes, RENNIOTS COMBI 125 ÜMAR is a combined end/start fitting designed for RUUKKI 125 mm round gutters. It provides a secure connection and is compatible with other 125 mm components like RENNIJÄTK and RENNIKONKS.
Which hooks to choose — short 55 mm or long 205 mm?
Choose based on eaves projection and roof type: 55 mm short hooks suit small projections, while 205 mm long hooks provide extra support for large eaves or insulated overhangs. Both sizes are available for RUUKKI 125 mm systems.
How are TORU 2.5M and TORU 1.0M pipes joined together?
TORU 2.5M, TORU 1.0M and TORU 4.0M are joined using couplers and pipe clamps (TORU KLAMBER), plus joint sleeves and bends where needed. RUUKKI-compatible fittings ensure a secure connection.
What angles and internal/external corners are available for 125 mm gutter?
For 125 mm round gutters there are external and internal corners at 90° and 135° (RENNI VÄLISNURK 90°/135° 125 ÜMAR, RENNI SISENURK 135°/90° 125 ÜMAR). They provide neat turns where the gutter changes direction.
Which part to use to divert water into the downpipe — RENNI ALLATULEK or TORUSUUE?
Use RENNI ALLATULEK 125/90 ÜMAR as the transition from gutter to downpipe (125→90 mm). TORUSUUE is typically the pipe end fitting used for final connections to drains or outlets.
Which clamps are needed to fix the pipe to stone and wooden façades?
RUUKKI supplies TORU KLAMBER clamps specifically for stone (kivi) and for wood (puit) façades. They differ in shape and fixing holes to provide secure attachment to different substrate types.
How to pick colour and finish so parts match the roof?
RUUKKI items come in standard shades like ANTRATSIIT and RR codes (RR32, RR23) indicated in product names. Choose the same RR colour code as your roof to ensure matching finish.