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Intrim Shadowline® is a patented timber skirting and door jamb system with a 10mm recessed shadow gap that delivers a seamless, minimalist finish. Installed before flooring and plasterboard, our premium, flush skirting removes the need for P50 metal angles and reduces installation by up to 30%. Available in one-piece, two-piece, and fire-rated FR MDF profiles.
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Home > Skirting and Architraves > Shadowline skirting
Shadowline skirtings and door jambs allows you to create gorgeous, modern interiors with neat, seamless flush finishes around walls and doors unlike standard skirting boards which attach to the face of the wall protruding into the room. Consisting of flush finish skirting and door jambs, the Intrim Shadowline SK800 series is suitable for both commercial and residential buildings.
The 800 Series Shadowline system is designed to be installed prior to flooring and plasterboard.
The 2-piece Shadowline system (SK801-802) provides the same results as the original single-piece original Shadowline system with the ability to reinstall the lower piece after the flooring is laid. This results in a significantly neater finish for timber or tiled floors.
The Shadowline skirting system includes 1-piece skirting for carpet or polished concrete, 2-piece skirting for timber or tile floors, matching door jamb, and CSRIO-tested fire-compliant options. Explore all Shadowline profiles here.
A Shadowline detail – also referred to as a recessed skirting, shadow gap skirting or shadow line skirting – is a thin recessed line where two surfaces meet, most often the wall and the floor. It removes the visual weight of a traditional skirting board, creating a neat, seamless, flush finish around walls and doors.
Ideal for residential homes, apartments, and commercial buildings alike, the Intrim Shadowline® range offers a patented skirting system with the shadow gap moulded directly into the timber rather than created on site using a P50 metal angle or L-bead.
Designed by Intrim’s founder, a former carpenter, the system fixes the parts of P50 installation that frustrate builders and disappoint designers in equal measure. There are three reasons it has become the preferred specification across Australian builds.
With a P50 metal angle, the shadow gap is created on site, where small variations in wall flatness, plaster setting and bead alignment translate directly into inconsistent grooves. Intrim Shadowline skirting removes that variability. The line is part of the timber profile itself, machined to specification, so the detail reads the same down a 5.4 metre length as it does at the corners.
Because the system arrives as a finished profile rather than a multi-step plaster-and-bead assembly, Intrim Shadowline cuts roughly 30% off install time compared with P50 shadowline and L-bead methods. Lengths supplied at 5.4m also reduce the number of joins on long walls.
A Shadowline detail is only as good as its weakest junction. The DJ800 Shadowline Door Jamb mirrors the SK800 skirting profile and suits 70mm and 90mm stud widths in 30mm and 40mm thicknesses. The pre-primed timber takes paint without the patchiness that can occur where MDF meets plaster, and the same shadow line architrave detail can be specified across architraves, openings, and curved feature walls.
Download Technical Specifications
Watch the video below to hear what one of our satisfied customers has to say about working with the Intrim Shadowline skirting system.
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For projects where fire-rated skirting is required under the Building Code of Australia (BCA), such as apartments, aged care, hotels, hospitals, and any Class 2–9 build under the National Construction Code, Intrim manufactures the SK800FR Shadowline® FR MDF profile. The same recessed detail in fire-rated, medium-density fibreboard.
The system has been tested by CSIRO in accordance with AS 1530.4-2014 and achieves an FRL of -/60/60. Specifiers can maintain the Shadowline detail in fire-rated walls without compromising compliance, an option that is not available in many competing flush finish systems.
Fire-rated installation differs from standard Shadowline installation. Specifications, installation instructions, and the full CSIRO assessment summary are available on request.
Three decisions determine which Shadowline profile suits a project: plasterboard thickness, flooring type, and visible skirting height. A fourth – groove depth – is a stylistic choice between the standard 10mm shadow gap and the more restrained 5mm gap offered in the SK805 series. Each profile delivers a true flush skirting board finish; the differences are practical, not visual.
The choice between one-piece and two-piece is determined by the flooring type and install sequence. Both deliver the same finished line. One-piece (SK800, SK800B, SK805) suits carpet and polished concrete. Two-piece (SK801-802, SK803-804) suits timber and tiled floors, where the lower piece is removed for flooring install, then refitted to maintain the recessed line.
Shadowline sizes are listed by visible height, measured from the floor to the top of the groove. The board itself extends approximately 25mm above the visible height, sitting concealed behind the plasterboard. Heights are available from 90mm to 285mm to suit the room scale and ceiling height.
Find your ideal profile using our quick selector or view the complete Shadowline table of dimensions to select the size and type to suit your project.
Most projects specify a Shadowline detail one of three ways: with a P50 metal angle, an L-bead, or the Intrim SK800 series. Each delivers the recessed line but with distinctions in consistency, install time, and how the finish performs over the life of the building.
The comparison below is the one most often asked for when builders evaluate P50 skirting against the patented Intrim Shadowline skirting alternative.
For trade builders, the case for SK800 is install time and rectification cost. For designers and architects, it is the consistency of the finished line – the part of a Shadowline detail that is most often compromised when the gap is built rather than machined.
Discuss your requirements with an Intrim specialist to find the perfect Shadowline detailing for your next project.
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Shadowline skirting boards are installed before flooring and plasterboard. The skirting and door jamb are fixed first, the plasterboard is set against them, and the joint between the two is finished with a setting compound and reinforcing tape. Intrim recommends Fiba Fuze tape and the manufacturer’s recommended drying time between coats: approximately 24 hours in normal conditions and 48 hours in cool conditions.
The videos below cover the essentials of installing Intrim Shadowline profiles, including the two-piece method for timber and tiled floors and how to fit door jambs correctly. Watch here or read our Shadowline installation guide.
The Shadowline detail does its best work where the rest of the architecture is allowed to be quiet. The projects below show how Intrim Shadowline skirting reads across different scales, finishes, and design languages, from a coastal apartment to a curved contemporary build.
Both the Shadowline skirting and door jamb are installed before plasterboard. Door jambs are assembled with mitre joints, fixed plumb and centred over the framing. Skirting is fitted tightly between the jambs. Plasterboard is then set against the back face of the jamb and on top of the skirting, with a PVC stop bead surrounding the jambs and reinforcing tape at the skirting-to-plasterboard joint.
Not when installed correctly. Intrim recommends Fiba Fuze tape at the join, with full drying time between coats of jointing compound – approximately 24 hours in normal conditions and 48 hours in cool conditions. The pre-primed timber provides a moisture barrier that further reduces the risk of seasonal movement.
Yes. Intrim manufactures Shadowline to suit curved wall applications. Curved sections are made to specification. Speak to the team about the radius and the profile required.
Not within the Intrim Shadowline System. A Shadowline ceiling treatment uses a metal angle at the wall-ceiling junction in place of a traditional cornice. It is commonly specified alongside Shadowline skirting and door jambs to maintain a consistent contemporary detail throughout an interior, but it is constructed by the plasterer rather than supplied as an Intrim product.
Shadowline skirting is priced in line with comparable Intrim profiles of the same size, material, and thickness. For project pricing, request a quote with the relevant lengths and profile codes.
SK800 series profiles are supplied in 5.4 metre lengths. This is significantly longer than standard P50 skirting lengths and reduces the number of joins on long wall runs.
Yes. The Shadowline System is supplied pre-primed only. The factory-applied primer creates a moisture barrier and provides a consistent base for paint.
Yes, the Intrim SK800 Shadowline® FR MDF skirting board meets the AS1530.4-2014 standard and is considered fire-rated, meeting the requirements for BCA fire compliance.
Shadowline contemporary residential project
Easy to follow step-by-step guide
Shadowline is a skirting & door jamb system.
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