Installations

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 SAXON STEEL Square Gutter System.
The STAL SAXON STEEL 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 80×80 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:

Fit the connector from the bottom, evenly, so that the gutter radii are firmly in contact with the radii of the connector.
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.
Bend the rear ears of the fitting against the gutter bead.
Put the clamp onto the front bead of the gutter and bend the leaf on the clamp.
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:

Bend away the upper leaves of the bottom.
Insert the lower part of the bottom into the gutter first, followed by the upper part.
Bend the leaves over the bead of the gutter.
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:

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.
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.
Bend the rear ears of the fitting over the bead of the gutter and of the corner.
Put the clamp onto the front bead of the gutter and of the corner and bend the leaf over the clamp.
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

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

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.
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.
Bend the rear ears of the fitting against the bead of the gutter and of the corner.
Put the clamp onto the front bead of the gutter and of the corner and bend the leaf over the clamp.
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:

Fit the connector from below, evenly, so that the radii of the gutter and the corner are firmly in contact with the connector radii.
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.
Bend the back ears of the fitting against the gutter and corner volute.
Attach the bracket to the front gutter and corner volute and bend the leaf on the bracket.
If necessary, tighten the fitting to the end board at the mounting hole.

Important information

Installation of the system in accordance with the following instructions guarantees the correct and reliable operation of the SAXON STEEL PVC Square Gutter System.

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.
The SAXON PVC Square Gutter System should not be installed below 5°C.
The PVC material from which the gutter system is made requires consideration of the phenomenon of thermal expansion of the system components. Properly designed and installed fittings of the system in question ensure proper temperature compensation of long elements.
The mounting elements of the system (gutter hooks, steel clamp) allow gutters and downpipes to move freely.
It is recommended to store the system in its original packaging and in a shady place until installation.

1. Preparation of the roof structure and installation of hooks

In order to properly install the Square Gutter System, we cut the rafters in the right way.

It is necessary to plan the alignment of the gutter with respect to the roof end so that the line drawn as its extension is 10-20mm from the outer edge of the gutter. The above alignment should protect the gutters from the impact of sliding snow. If the above guideline cannot be followed, snow fences should be installed on the roof to reduce the risk of gutter damage from sliding snow.

The recommended hook spacing for the square gutter system is 50 cm..

2. Determining the correct slope of gutters

When placing the hooks for the SGS, it is important to keep in mind the correct slope of the gutter, for this purpose the gutter should have a slope towards the drain funnel, which is about 0,3% (i.e. 3 mm of slope per 1 meter of gutter). To achieve the correct slope, first the hook furthest from the funnel should be installed and then the hook at the drain funnel. When determining the location of the remaining hooks, we recommend using a string.

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

3. Determining the position and preparing the opening for the drain funnel

An equal step in the installation of the SGS is to determine the position of the drain funnel, which is the lowest point of the system. The hooks should be installed at a distance of 15 cm from the edge of the drain funnel and other gutter fittings such as universal: connector, bottom and corner.

Having determined the location of the drain funnel, a square hole should be cut off in the bottom of the gutter, corresponding to the dimensions of the drain pipe. Use a jigsaw or scissors to cut the hole.

4. Installation of the gutter connector

Before installing SGS gutter fittings, be sure to apply gasket spray. Following the above recommendation will allow easier installation of fittings and facilitate thermal movement of the gutter during temperature changes. When installing gutter fittings such as gutter connector, drain funnel and universal corner, the end of the gutter should be set about 1 cm from the end of the edge of the gully, so that the gutter edge spacing in the fittings does not exceed 5 cm.

5. Installation of the universal Stopend

Universal stopends should be installed at the ends of the gutters, and attention should be paid to the correct positioning of the gasket. To do this, use a gasket spray.

First, we install the rear part of the stopend, and then wedge its front part against the front overhang of the gutter.

6. Installation of the universal corner

Installation of the universal corner begins by sliding the gutter into the rear overhang of the corner and then snapping the front of the gutter into the corner.

Pay attention to the correct gasket alignment. To do this, use a gasket spray.

7. Installation of a soil pipe

The soil pipe is connected to the pipe with an elbow or pipe fitting..

In order to install dowels in the façade, it is necessary to select their length according to the thickness of the building’s insulation. The next step is to install the clamps on dowels with a maximum spacing of up to 2m.

The pipes should be placed in the clamps, making sure to apply enough pressure when screwing the clamp on the pipe to allow free thermal movement of the pipe.

8. Completion of installation

In order to discharge the SGS into the sewer system, a universal settling tank should be placed in the ground under the drain pipe. Cut a hole in the flap of the universal settling tank equal to the size of the drain pipe and then insert it into the hole of the settling tank flap.

In order to drain the square gutter system to the ground, an elbow should be installed at the end of the drain pipe.

START

Before installation, read this instructions carefully and follow the installation procedures and guidelines for occupational health and safety agencies (OSHA). It is recommended to use personal protective equipment when moving and performing work on the roof.

This includes, among others, protection against falling and personal protective equipment such as gloves, protective glasses, protective helmet and safety braces, etc. Avoid contact with sharp edges of metal sheets. Tin and PVC products are recyclable. Utilization should be made at a selective waste collection point after the product life cycle is completed.

The installation of the system in accordance with the instructions below, guarantees the correct and reliable operation of the PVC gutter system.

The PVC SAXON STEEL Gutter system should not be mounted below 5 ° C.
The PVC material from which the gutter system is made requires taking into account the thermal phenomenon of extending the system components. Properly designed and installed fittings of the system, ensure proper temperature compensation for long elements.
The assembly elements of the system (gutter hooks, steel clamps) allow free movement of gutters and drain pipes.
It is recommended to store the system in the original packaging and a shaded place until assembly.

1. Preparation of the roof structure and bracket installation

In order to properly install the PVC gutter system, we cut the rafters the right way.

It is necessary to plan the gutter position in such a way that the line marked as its extension is located 10-20mm from the outer edge of the gutter. The above location should protect the gutters against snow sliding off. In the absence of the above guideline, you should mount a snow stop on the roof, which will reduce the risk of gutter damage by sliding snow.

Recommended hook spacing is 50 cm c/c .

2. Determining the correct fall for the gutters

When locating the brackets to the PVC gutter system, remember about the correct decline in the gutter, for this purpose the gutter should have a decrease towards the drain funnel, which is about 0.3% (i.e. 3 mm fall per 1 meter of the gutter).

To obtain a correct decrease, first mount the hook the furthest from the funnel and then the hook near the drain funnel. When determining the place of assembly of the remaining hooks, we recommend using a string. Properly installed hooks will prevent the system blocking .

3. Determining the position and preparation of the hole for the funnel

The next stage of assembly of the gutter system is determining the position of the drain funnel, which is the lowest point of the system. Brackets should be mounted 15 cm from the edge of the drain funnel and other gutter fittings such as universal connector, stopend and corner.

After determining the funnel position , the hole should be cut out in the bottom of the gutter, corresponding to the dimensions of the drain pipe. Use a jigsaw or scissors to cut out the hole.

4.Installation of gutter connector

Before installing gutter fittings, remember to use gaskets. Compliance with the above recommendation will allow easier installation of fittings and facilitate the thermal movement of the gutter during temperature changes. In the case of assembly of gutter fittings such as the connector, the gutter end should be set according to the temperature scale located on the detail.

5. Installation of the universal Stopend

At the ends of the gutters, universal stopends should be installed, pay attention to the correct arrangement of the seal. To do this, use a gasket spray(silicone spray) .

6. Installation of universal corners

7. Installation of the downpipe

In order to mount the downpipe clamps in the facade, you should choose their length for the thickness of the building insulation. The next stage is to install on downpipes while maintaining a maximum distance of up to 2m.

Place the pipes in the clamps, remembering that when twisting the clamp on the pipe, use the right pressure, enabling free thermal movement of the pipe.

8. Completion of the installation

In order to drain the PVC gutter system into the sewage system, a universal settler or leaf gully should be placed in the ground under the drain pipe. In a universal settler flap, cut a hole equal to the dimension of the drain pipe and then put it into the hole of the trap flap.

SAXON STEEL Hidden Gutter Installation Manual

Introduction

Read this manual carefully before installation and follow installation procedures and HSE guidelines. Use PPE (e.g., gloves, safety glasses, hard hat, harness) when working on roofs. Avoid sharp metal edges. Metal and PVC products are recyclable; dispose of at designated recycling points after use.
For non-eaves systems, prepare the roof at the design stage. Set the wall plate as far back as possible from the outer wall to allow efficient insulation between it and the HG(Hidden Gutter) base. If the building is already designed, inform the client and contractor about potential wall plate adjustments.

1. Roof Structure Preparation

Prepare rafters for HG installation. For 200 mm insulation, cut rafters so their edge is 15 mm recessed from the wall. Ensure the wall plate’s vertical section allows connection of external wall insulation to loft insulation (traditional or over-rafter). Alternatively, design a recessed ring beam.

2. Base Panel Preparation

Use 25 mm MFP panels for the system base. Create an L-shaped structure with vertical panels (205–215 mm) and horizontal panels (215 mm or calculated via calculator). Join panels with an overlap, secure with screws after levelling, and fix to pre-cut rafters with screws. Reinforce with flat brackets every 1500 mm.
To prevent snow damage to the fascia, ensure the roof extends above its top edge. Install snow guards.

3. Downpipe Outlet Preparation

Use a template to mark the outlet hole on the MFP panel and gutter apron. Cut using a hole saw and jigsaw.

Calculate Gutter Installation Data

Use the online calculator to determine distance Z (height between panel edge and batten top edge).

Kalkulator

4. Additional Membrane Protection

Cover the structure with SAXON STEEL breathable membrane, secured with staples and membrane tape.
See point 14 for vertical downpipe installation.

5. Gutter Apron Hole Preparation

Mark the outlet hole on the gutter apron using the same template (inner PAS circle). Drill the centre with a screwdriver, then cut the circle with tin snips. Fold the circle’s edges upward to prevent condensation entering the downpipe insulation.

6. Gutter Apron Installation

Fix the gutter apron to the MFP panel with stainless steel screws, at least 10 mm from the panel edge. Maintain the apron’s 3° slope (10 mm gap between apron and panel). Join apron sections without glue/sealant, using a slide or standing seam.
Fabricate and fit the vertical eaves metal independently, connecting it to the membrane with double-sided tape.

7. Fascia Hook Installation

The SAXON STEEL Hidden Gutter System conceals the 130 mm PVC gutter’s slope. Install the first fascia hook 10 cm from the MFP panel’s side edge, level with its top edge. Space subsequent hooks every 50 or 66 cm (depending on roof pitch), keeping them level with the panel’s top edge. Adjust hooks using slotted holes if needed. For hipped roofs, space hooks individually within maximum distances. Ensure 1–1.5 cm gap between fascia and gutter apron for ventilation.

8. PVC End Hook Installation

Highest hook: Align with the first hole of the fascia hook.

Lowest hook (with downpipe outlet): Align with the second hole of the fascia hook.
Space end hooks max 60 cm apart. Maximum gutter slope: 0.3% (3 cm per 10 m).

Highest hook: Align with the first hole of the fascia hook.
- Lowest hook (with downpipe outlet): Align with the second hole of the fascia hook.
  Space end hooks max 60 cm apart. Maximum gutter slope: 0.3% (3 cm per 10 m).

9. PVC Downpipe Outlet Installation

Position the outlet in the hole, then fit the gutter.

10. PVC End Cap Installation

Spray the end cap with gasket spray. Apply silicone sealant at the joint for extra sealing. Follow the online installation guide for additional accessories.

11. Fascia Installation

Trim the fascia end 15 mm to avoid clashing with the PVC end cap. Fit the fascia from the top, clicking its bottom into the hook’s lower part. Insulate the gap between the MFP panel and wall plate for extra thermal protection. Ensure the fascia’s bottom is properly seated in the hook pin before clicking.

12. Fascia Connector Installation

Connect the fascia using a dedicated connector by sliding or clicking. Install the matched over-gutter strip for the SAXON STEEL Hidden Gutter System.

13. End Cap Installation

Finish the fascia with a dedicated end cap by sliding it in.

14. Vertical Downpipe Installation

Space wall plugs max 2 m apart. Fit polystyrene insulation (per diagram), secure steel clamps to the PVC pipe, and attach insulation with polystyrene adhesive, ensuring plugs are pre-positioned.

15. Gasketed Coupling Installation

Lubricate the coupling’s gasket with silicone for easier fitting with the outlet. Apply aggressive PVC glue to the pipe’s bottom before fitting to the coupling. The gasket ensures proper pipe dilation. Connect downpipes similarly using gasketed couplings.

16. Inspection Chamber Installation

Install a drainage system with a flexible elbow and inspection chamber (with superstructure). The chamber’s grate catches debris to prevent blockages.

17. Vertical Downpipe Completion

Place downpipes in the insulation fitting, secure steel, and seal with a polystyrene cover using adhesive or low-expansion foam. Follow insulation and render manufacturer guidelines.

18. Snow Guard Recommendation

19. SAXON STEEL Hidden Gutter System for Eaves Roof (SAXON STEEL PVC Gutter System)

Use the same plywood structure as point 2. Create a soffit support with 25 x 50 mm timber battens, spaced max 40 cm, level with the base panel’s bottom. Install a J-profile soffit strip for easy soffit fixing.

20. SAXON STEEL Hidden Gutter System for Eaves Roof (SAXON STEEL PVC with Square Downpipe)

Connect the 130 mm PVC outlet to the 80×80 mm square PVC pipe using a 90/80×80 mm adapter, sprayed with gasket silicone. For eaves roofs, use a square elbow and a cut-to-length square pipe section. For straight downpipe installation, connect the outlet with an adapter and square coupling.

21. Square Downpipe Installation

Space wall plugs on the facade based on insulation thickness (SAXON STEEL plugs: 12×100, 12×160, 12×200, 12×260, 12×300). Fit steel clamps to plugs, max 1.8 m apart, ensuring pipe dilation. Connect pipes with square couplings. Match pipe colour to fascia (RAL 9005 Black or RAL 7016 Graphite).

22. Installation Completion

Connect the square pipe to drainage using a universal drain trap. Cut an 80×80 mm hole in the trap’s lid for the pipe.