TWISTED CLAMP 150 | GUTTER SYSTEMS | Center for roofing materials, Sofia

Twisted hook 150 – BILKA 150/100 rainwater system

Twisted hook: for fixing to the side of a rafter or beam.

Made from 0.6 mm Swedish steel, galvanised and coated on both sides. Available in Gloss, Matt and Magnelis finishes – choose the finish and colour in the options.

The element is for the 150/100 system (150 mm gutter, Ø100 mm pipe).

Twisted hook 150 – BILKA 150/100 rainwater system

BILKA system advantages

Swedish SSAB steel 0.6 mm – galvanised on both sides (275 g/m²) and coated on both sides
RC5 corrosion resistance – withstands acid rain, salty snow and UV
Easy installation – elements click together like building blocks, without extra silicone
Complete system – gutters, pipes, brackets and all fittings in one colour
Maintenance – only periodic cleaning of leaves from the gutters

Colours

Choose the finish and colour in the product options. The colour must match the finish: 13 colours for Gloss, 5 for Matt, and Magnelis.

Double-coated SSAB steel – Gloss (13) – 15-year warranty for colour and corrosion

Double-coated SSAB steel – Matt (5) – 20-year warranty for colour and corrosion

Magnelis® – 10-year corrosion warranty

On-screen colours are approximate. We recommend seeing a sample at the ROOFER office.

The system and its elements

The BILKA system comes in two sizes: 125/90 (125 mm gutter, Ø90 mm pipe) – the most common choice for family houses – suitable for roof areas up to about 150 m²; and 150/100 (150 mm gutter, Ø100 mm pipe) – for large houses, villas and buildings with a high volume of rainwater.

System elements 150/100

Gutter 150 mm – 4 m Gloss, 4 m Matt, 4 m Magnelis, 2 m Gloss, 2 m Magnelis, 2 m Matt
Downpipe Ø100 – carries water from the gutter down the facade
Gutter hook 210 mm – carries the gutter; fixed to rafters or roof boarding and bent to give the fall
Gutter hook 160 mm – shorter gutter hook for a smaller offset
Fascia bracket – fixes the gutter directly to the fascia board
Twisted hook – for fixing to the side of a rafter or beam
Reinforcing clip – stiffens the gutter and keeps it firmly in the hooks
Downpipe bracket – fixes the downpipe to the wall – no more than 2 m apart
Gutter end cap – closes the end of the gutter
Gutter joint – joins two gutters with a seal
Gutter outlet – connects the gutter to the downpipe
60° elbow – goes around the eaves and leads the pipe to the wall
Hopper – collects water from several gutters into one pipe
Extension pipe 1 m – extends the pipe between the elbows
External corner – for external roof corners
Internal corner – for internal roof corners
Branch (Y-piece) – joins two downpipes into one
Outlet shoe – directs water away from the foundation

Technical data

System	150/100
Finishes	Gloss, Matt, Magnelis
Warranty	Gloss 15 yrs, Matt 20 yrs (colour and corrosion); Magnelis 10 yrs (corrosion)
Material	Swedish steel 0.6 mm, hot-dip galvanised on both sides (275 g/m²)
Paint (Gloss / Matt)	35/35 µm / 40/40 µm (ISO 2808)
Corrosion resistance	RC5
UV category (Gloss / Matt)	RUV3 / RUV4
Scratch resistance (Gloss / Matt)	35 N / 30 N
Working temperature	up to +100 °C; forming down to −15 °C

Data according to BILKA.

How it is installed

Hooks. Fit the hooks 60–90 cm apart with a gutter fall of 3–5 mm per metre towards the pipe. End hooks about 10 cm from the gutter end, and one hook on each side of every corner.

Marking out. Fit the end hooks first and stretch a string between them to line up the rest. With two pipes, start from the middle with a fall towards both sides.

Gutters and corners. Start with the gutter that has the outlet fitted. Leave 2–3 mm between gutters and corners for thermal expansion; the joints close the connection with a seal.

Outlet. Cut the opening in the gutter with a hacksaw or shears – not an angle grinder – and bend the edges outwards into the outlet.

Pipes. The first pipe bracket goes 150 mm below the elbow, with no more than 2 m between brackets. On insulated facades use an anchor of suitable length.

Cleaning up. Clean metal shavings and offcuts out of the gutters – otherwise they rust and stain the surface.

Video: BILKA rainwater system installation guide

BILKA warranty

Gloss: 15-year warranty for colour and corrosion
Matt: 20-year warranty for colour and corrosion
Magnelis: 10-year corrosion warranty

The warranty applies when BILKA’s instructions for transport, storage, installation and use are followed. Keep the purchase invoice.

EU GARAN label

EU GARAN: Bilka Steel Gloss, 15 years — Gloss

EU GARAN: Bilka Steel Matt, 20 years — Matt

EU GARAN: Bilka Steel Magnelis, 10 years — Magnelis

Scan the QR code or tap the label for EU information on commercial durability guarantees.

Rainwater system installation by ROOFER

our own team with 15 years of roofing experience
we calculate every element – gutters, pipes, hooks and corners
installation with the correct fall, no leaks and no dripping on the facade
site visit and a quote for materials and installation

Book a site visit

ROOFER tips

Choose the size by roof area: 125/90 – up to about 150 m², larger roofs – 150/100.
Cut gutters and pipes with a hacksaw or metal shears – not an angle grinder.
Clean leaves out of the gutters at least once a year.
Order every element in the same colour and finish so the system looks uniform.

Delivery and storage

Delivery throughout Bulgaria. ROOFER delivers the rainwater system to your site together with the other roofing materials.

Inspection on arrival. Check the elements against the delivery documents and look for visible damage.

Storage. Keep gutters and pipes dry, on a flat base and without loads on top so they do not deform.

Payment and invoices

Card: Pay at the ROOFER office.

Bank transfer: Payment by bank transfer is available.

Company invoice: We issue an invoice using your company’s billing details.

Cash: We issue a fiscal receipt.

Request a quotation from ROOFER

Call us on 088 939 2000 or send us the roof dimensions – we will calculate every element of the rainwater system.

Metal characteristics
Unit of measurement		pc
Product thickness		0.6 mm
System		150
Coating		Gloss/Mat/AlZinc
Producing		BILKA
Guarantee		15 / 20 / 10 years (Gloss / Matt / Magnelis)