BORGA | BPD 18

BPD 18

Borga BPD 18 is a profiled metal sheet, which thanks to its large covering widths (1080) is an economical alternative for traditional profiles 20. It is mainly used as a covering for agricultural and industrial buildings and is easily assembled. Profiled metal sheets are delivered in the required lengths, in order to minimize material wastage. Together with an effective draining profile it makes an excellent choice when an effective, but inexpensive roof covering solution is required.

Borga BPD 18 profiled metal sheets are manufactured from a steel metal sheet, cold rolled and hot zinc-plated using the Sendzimir 2 method (zinc-plated in sheets with zinc coat of 275 g/m , ASTM 52571, 25 m/layer). After that the metal sheet is covered with a passivation layer, primer and then a colored layer of Polyester or Plastisol paint is applied. The choice of coats depends on external environmental conditions.

We offer a wide variety of standard colors.

ASSEMBLY INSTRUCTION FOR BPD

Preparation

The first step in preparing the assembly is to check whether the roof slope has straight angles. Small deviations, about 20-30mm, can be concealed with gable trims. If the deviation is larger than this it is recommended that the roof be repaired.

The base made of matched board

The wooden boards need to be at least 17 mm thick and should be covered with roof base paste board. A wooden purlin or a Borga type steel patch (drawing No. 5) should be used. If you use our steel patch, you do not need a bed laths, it possesses good ventilation properties. Metal sheets can be assembled without using split laths, but in this case a completely smooth surface is required.

If you choose to use wooden purlin, you will need additional bed laths 25 x 25 mm, which should be arranged at a distance of 600 mm in the spaces between centers. Purlins (28 x 50 mm) should be arranged on the bed lathes leaving a maximum of 500.

The base made of strong wooden laths or from light steel purlins If you do not choose the wooden base, but instead just use purlins, e.g. stronger wooden purlins, glulams or light steel purlins, the distances can be increased. If the room is not heated you should use some kind of condensation protection under the metal roof, For example, Borga system of condensation protection (NonConDrop).

The assembly of the roof

The Borga gutter hook should be assembled as shown in Picture No. 4. The metal sheet should be placed as shown in Picture No. 6. It is important that the first metal sheet is placed at the straight angle towards the eave and that the extreme overflow gutter lies under the lap. If it is necessary to bind metal sheets crosswise the joint must be made as shown in Picture No. 3.

Borga BPD 18 metal sheets are usually fastened to wood or steel prulin using our screws with screw thrust deduction. Screws must be fastened at the bottom section of the profile. Along the eaves and at transverse joints the metal sheet should also be fastened the bottom section of every profile in every second wave. On the remaining sections of a roof profile, a screw in every other lower section of the profile is needed. If the distance between purlins exceeds 50 mm, side laps should be riveted or screwed with overlap screws at a maximum distance of 500 mm.

Picture

The assembly of the trims

The ridge metal sheet and the bargeboard should be screwed or riveted at a maximum distance of 300 mm, as shown in Pictures No. 1 and 2. Joints with one sealed overlap at a minimum distance of 100 mm. To prevent movement caused by changes of temperature you should not screw the trims together on the overlaps.

Closure Strip

Under the ridge the insulation can be fitted using our profiled clouser strips to prevent snow and water getting under the metal sheet.

The minimum roof slope

The minimum roof slope for o wooden bases is 8° and for steel o bases, 5,7° . If the slope of the roof is less than 14° a sealing strip of silicon should be placed on the side- and end overlap.

Paint System

Borga BPD 18 is delivered with the well and long used paintsystems plastisol or polyester. No matter which solution you choose, we guarantee a minimum durability of 10 years on the painted surface.

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