STAL Square Gutter System Installation Manual

 

 

Table of Contents:

• Tools needed for installation
• Important information
• 1. Preparation of the roof structure and installation of hooks
• 2. Determining the correct gutter slope
• 3. Determination of the position and preparation of the opening for the drainage funnel
• 4. Gutter connector installation
• 5. Installation of the universal bottom
• 6. Installation of (universal) inner corner
• 7. Installation of the (universal) outer corner
• 8. Installation of the downpipe
• 9. Completion of the installation
• 10. Overlapping installation

Tools needed for installation

Important information

• Before installation, carefully read these Instructions and follow the installation procedures and guidelines of the Occupational Safety and Health Agency (OSHA). It is recommended to use personal protective equipment when moving and working on the roof. Such equipment includes fall protection measures and personal protective equipment such as gloves, safety glasses, safety helmets and safety harnesses, etc. Avoid contact with sharp edges of metal sheets. Metal sheets and PVC products are recyclable. They should be disposed of at a point for separate collection of waste after the end of the product life cycle.
• Installation of the system by following the instructions below guarantees the correct and reliable operation of the STAL KROP Square Gutter System.
• The STAL KROP STAL Square Gutter System must not be installed at a temp. below 0°C.
• The steel material from which the gutter system is made requires thermal elongation of the system components to be taken into account. Properly designed and installed fittings ensure correct compensation of the temperature of long components.
• The system mounting components (gutter hooks, steel clamp) allow the gutters and drain pipes to move freely.
• It is recommended to store the system in its original packaging and in a shaded place until installation.

1. Preparation of the roof structure and installation of hooks

To install the STAL SGS correctly, cut the rafters to length in the proper manner. 

Plan the positioning of the gutter relative to the roof end so that the line marked as its extension is 10-20 mm above the outer edge of the gutter. The above positioning should protect the gutters from the impact of snow sliding down. If it is not possible to follow the above guideline, snow fences must be installed on the roof to reduce the risk of the gutter sustaining damage from snow sliding down.

The recommended hook spacing for the STAL SGS is up to 50 cm.

2. Determining the correct gutter slope

When positioning the hooks for the STAL SGS, the correct gutter slope must be taken into account. To this end, the gutter must have a slope towards the discharge funnel of approximately 0,3% (i.e. 3 mm of slope per 1 metre of the gutter).  To achieve the correct slope, the hook furthest away from the funnel must be installed first, followed by the hook next to the discharge funnel.  We recommend using string when determining the installation location for the other hooks.

Correctly installed hooks will prevent the system from leaking at the gutter joints.

3. Determination of the position and preparation of the opening for the drainage funnel

An equally important step in the installation of the STAL SGS is determining the position of the discharge funnel, which is the lowest point of the system. The hooks must be installed not further than 15 cm from the edge of the discharge funnel and other gutter fittings such as the universal parts, i.e. the connector, the bottom and the corner.

Once the location of the discharge funnel has been determined, a square opening must be cut in the bottom of the gutter, corresponding to the drain pipe dimensions of 80x80 mm. The edges of the opening must be bent according to the direction of water flow. 

The discharge funnel must be installed at the location of the cut out opening, and then the mounting leaves must be bent onto the gutter beads. 

4. Gutter connector installation

Remember to apply gasket spray prior to installing the STAL SGS gutter fittings. Next, you should properly trim both ends of the gutter so that their edges fit precisely into each other. This will ensure the stability of the entire structure. In the next step, a union should be placed on the connected ends of the gutter to form a permanent and watertight connection. You must follow the proper sequence of installation steps to correctly place the connector: 
 

1. Fit the connector from the bottom, evenly, so that the gutter radii are firmly in contact with the radii of the connector.
2. Press the rear parts of the gutters (so that the rear bottom of the gutter settles in the connector). The gutter connector must be tightened so that the opening in the connector is flush with the rear part of the gutter.
3. Bend the rear ears of the fitting against the gutter bead.
4. Put the clamp onto the front bead of the gutter and bend the leaf on the clamp.
5. If necessary, tighten the fitting to the face board at the mounting hole location.

5. Installation of the universal bottom

Universal bottoms must be installed at the ends of the gutters, and attention must be paid to the correct positioning of the gasket. A roofing sealant must be used to improve the sealing of the system.

To install the bottom correctly:
 

1. Bend away the upper leaves of the bottom.
2. Insert the lower part of the bottom into the gutter first, followed by the upper part.
3. Bend the leaves over the bead of the gutter.
4. Screw in the bolt in place of the mounting hole.

6. Installation of (universal) inner corner

Silicone sealnt spray should be applied before SRK STAL gutter pieces are assembled. Next, both ends of the components should be cut accordingly in such a way that the edge of one end can fit precisely into the other end. This will ensure the stability of the whole structure. At the next stage, a union should be placed on the joined ends of the components to form a sealed and secure connection.

You must follow the proper sequence of installation steps to correctly place the connector: 
 

1. Fit the connector from the bottom, evenly, so that the radii of the gutter and of the corner are firmly in contact with the radii of the connector.
2. Press the rear parts of the components (so that the rear bottom of the gutter and of the corner settles in the connector). The gutter connector must be tightened so that the opening in the connector is flush with the rear part of the gutter. 
3. Bend the rear ears of the fitting over the bead of the gutter and of the corner.
4. Put the clamp onto the front bead of the gutter and of the corner and bend the leaf over the clamp.
5. If necessary, tighten the fitting to the face board at the mounting hole location.

ATTENTION! There is an alternative gutter installation method available - see point 10. Overlapping installation

7. Installation of the (universal) outer corner

Silicone sealnt spray should be applied before SRK STAL gutter pieces are assembled. Next, both ends of the components should be cut accordingly in such a way that the edge of one end can fit precisely into the other end. This will ensure the stability of the whole structure. At the next stage, a union should be placed on the joined ends of the components to form a sealed and secure connection.

You must follow the proper sequence of installation steps to correctly place the connector: 
 

1. Fit the connector from the bottom, evenly, so that the radii of the gutter and of the corner are firmly in contact with the connector radii.
2. Press the rear parts of the components (so that the rear bottom of the gutter and of the corner settles in the connector). The gutter connector must be tightened so that the opening in the connector is flush with the rear part of the gutter. 
3. Bend the rear ears of the fitting against the bead of the gutter and of the corner.
4. Put the clamp onto the front bead of the gutter and of the corner and bend the leaf over the clamp.
5. If necessary, tighten the fitting to the fascia board at the mounting hole location.

ATTENTION! There is an alternative gutter installation method available - see point 10. Overlapping installation

8. Installation of the downpipe 

Connect the discharge funnel to the pipe using an elbow joint, or directly to the drain pipe (in case of an eavesless roof).

To install dowels in the façade, the length of the dowels must be selected according to the thickness of the building insulation. The next step is to install the clamps on the dowels with a maximum spacing of 1.8 m. If the drain pipe riser is more than 4 m, an additional clamp, below the pipe connector, must be used when joining the two pipes.

Place the pipes in the clamps, making sure to apply enough pressure when screwing the clamp onto the pipe to allow free thermal movement of the pipe.

9. Completion of the installation

To discharge water from the STAL SGS into the sewerage system, a universal settling tank must be placed in the ground under the drain pipe. Cut an opening in the flap of the universal settling tank. The opening must be the size of the drain pipe. Then, insert it into the opening of the settling tank flap.

To drain the STAL square gutter system to the ground, an elbow must be installed at the end of the drain pipe.

10. Overlapping installation

The alternative installation of the universal corner starts with notching the gutters and removing the inner gutter folds.

The prepared gutter is pushed into the inner profile of the corner. Then place the gutter connector on the formed joint and proceed in the correct order of assembly steps: 
 

1. Fit the connector from below, evenly, so that the radii of the gutter and the corner are firmly in contact with the connector radii.
2. Tighten the rear ends of the elements (so that the rear bottom of the gutter and the corner align with the connector). The gutter connector should be tightened so that the hole in the connector faces the back of the gutter. 
3. Bend the back ears of the fitting against the gutter and corner volute.
4. Attach the bracket to the front gutter and corner volute and bend the leaf on the bracket.
5. If necessary, tighten the fitting to the end board at the mounting hole.