What does 160 mm mean for the BILKA self-fixing bracket?

The number 160 mm indicates the length of the gutter hook in the official BILKA catalog, not the diameter of the gutter. The product itself comes in separate sizes of 125 and 150 mm for the respective cross-section. The hook supports the gutter along the eaves and is attached to a suitable wooden base according to the mounting geometry. The length of 160 mm does not indicate a specific load capacity; such a value is not published in the product documentation used.

Is the BILKA 160 mm bracket compatible with both size groups of gutters?

Yes, Shopify offers separate variants of 125 and 150 mm with the same nominal length of 160 mm. The 125 mm variant is used with a 125 gutter in the 125/90 system, and the 150 mm variant with a 150 gutter in the 150/100 system. They are not interchangeable because the gripping profile is different. When ordering, the cross-section, hook length, coating, color, and SKU are specified.

How many variants of the BILKA 160 mm self-fixing bracket are there?

Shopify has 36 combinations available: 18 each for 125 and 150 mm cross-sections, with Matte, Gloss, and "Zinc" coatings. For example, 125 mm / Matte / RAL 8017 is SKU LT-1335, and 150 mm / Zinc is LT-1369. The color is matched to the gutter when the hook remains visible, but matching the cross-section is mandatory. A physical sample is more reliable than a screen display when choosing a coating.

How do I choose between the BILKA 160 mm and 210 mm gutter brackets?

The choice between 160 and 210 mm depends on the mounting location, the width of the support area, and the required position of the gutter relative to the roof edge. Both sizes are available for 125 and 150 mm, but the longer hook should not automatically be considered stronger. Before ordering, measure the actual eaves and check the mounting detail. Color and price are secondary to the correct support geometry.

At what spacing are the BILKA 160 mm brackets installed?

The manufacturer specifies a distance of 600-900 mm between gutter hooks. At each corner element, one hook is placed on both sides, and the end supports are located close to the line’s end. The spacing is marked before installation and adjusted according to the position of the supporting wood. Support is not skipped just to maintain an equal interval if there is a corner, joint, or unsuitable mounting spot.

How are the BILKA 160 mm brackets arranged to ensure an even slope?

First, the downspout points are determined and the high and low positions of the gutter are marked. The hooks are numbered and arranged along a stretched string so that each follows the calculated line. With two downspouts, the slope can start from the middle towards both ends. Attachment is done through the factory holes to a solid base. After installing the gutter, check for local low spots and water retention.