Metal sills (outside)

External metal sill is a functional and protective component designed to ensure proper water drainage away from the building facade. It significantly reduces the risk of water penetration into wall structures and window/door connections.

This component is essential when installing windows or doors in insulated wall systems.

Purpose & function

• Directs rainwater away from façade and wall joints

• Protects lower part of window/door opening from moisture exposure

• Prevents water leakage into insulation layer

• Improves durability of wall assembly and openings

Application

Recommended for use when:

• Wall insulation kit is applied (Horizontal or Vertical cladding systems)

• Installing windows and doors in insulated timber frame or log structures

Used for:

• Windows

• Doors

Compatible with windows and doors qualities:

• Premium

• Premium Plus

• PVC

• HQ Wooden

Standard specifications

Colours

• Anthracite Grey – RAL 7016

• Chocolate Brown – RAL 8019

Widths

• 90 mm

• 115 mm

Installation notes (IMPORTANT)

 Metal sills are NOT ready-to-install products

Preparation required:

• Side parts (end caps / folds) must be formed according to:

  • Opening width

  • Wall structure

  • Installation method
     

Installation Guidelines

• Ensure proper slope away from the building

• Seal connection between sill and window/door frame using silicone

• Fix sill mechanically using screws

• Ensure tight fit to avoid water ingress under sill

• Align with insulation layer and external finish

Common mistakes to avoid:

• Installing without slope

• No silicone sealing to frame

• Wrong width selection

• No side preparation (open ends → leaks)

• Direct fixing without allowing proper drainage path