How to Install Shadowline Skirting and Door Jambs

Cut the DJ800 door jamb material to required lengths. Make a 45-degree mitre cut at the top of each stile and at both ends of the head. Assemble the mitre joints between the head and stiles using PVA glue and nails or screws. (Detail A)

Pack the opening and install the DJ800 door jamb plumb and level. Take care when installing jamb material, to make sure it is fixed parallel with timber framework.

Calculate the required jamb width by allowing for:

• The wall-frame width
• Plasterboard on both sides
• The finished plaster-set thickness on both sides

For example, a 90mm frame with 10mm plasterboard and approximately 3.5mm of plaster set on each side requires a total jamb width of 117mm. This leaves 13.5mm between the frame face and the jamb face on each side.

Once the DJ800 door jambs are installed, cut the SK800 skirting to fit neatly between the jambs and the internal and external corners. Use 45-degree mitre cuts at corners.

When joining skirting along a straight section of wall, use a splice joint positioned over the centre of a wall-frame stud. Do not use a butt joint.

Fix SK800 to:

• Timber framing: using nails or screws
• Steel framing: using screws only

Fix the skirting into every stud at a maximum of 600mm centres. Use:

• At least two fixings per stud for skirting up to 90mm high
• At least three fixings per stud for skirting from 135mm to 185mm high
• At least four fixings per stud for skirting from 235mm to 285mm high

Include one fixing approximately 20mm from the base of the skirting and another through the centre of the ribbed section at the top.

Install 5mm packers between the bottom edge of the skirting and the floor to allow for subframe movement.

(Detail B)
(Refer to Figure 2)

Install the plasterboard to the framing in accordance with the  plasterboard manufacturer’s specifications.

Cut and fit each sheet as close as possible to the door jamb and skirting edges. Where possible, position the factory-finished plasterboard edge against the top edge of the SK800 skirting.

Install PLTB 630 30mm x 6mm tear off PVC stop beads around the door jambs. Install the required perforated metal angles at external wall corners. Cut corner intersections carefully to minimise the build-up of plaster-setting compound. (Detail C)

Remove all dust from the ribbed section at the top of the skirting before applying plaster-setting compound.

Set the joint where the bottom edge of the plasterboard meets the SK800 skirting using FibaFuse or paper reinforcing tape. Using a tape outside the recommended tape types may void the product warranty.

Position the tape centrally over the joint. The bottom edge of the tape should finish approximately 5mm to 10mm from the bottom edge of the skirting’s ribbed section.

Install all plaster-setting products and accessories in accordance with the relevant manufacturer’s specifications and instructions. We recommend using USG Boral and CSR plaster products only.

Installation tip: Allow every coat of jointing compound to dry fully before applying the next coat. Drying generally takes approximately 24 hours in normal conditions or 48 hours in cool conditions. Insufficient drying can contribute to cracking at the plasterboard and skirting junction. See USG Boral instructions here.

Apply plaster-setting compound to the PVC stop beads around the door jambs. Install and finish all plaster-setting products in accordance with the manufacturer’s specifications and instructions.

Apply all required coats of plaster-setting compound, including the finishing coats, and sand the joints smooth.

Once the compound has dried, tear off the exposed PVC lip from the stop bead around each door jamb. The surface is now ready for painting. All plaster set and accessories must be installed to manufacturer’s specifications and instructions.

Cut SK800 to required lengths to fit neatly between door jambs and internal and external corners of framework. Cut SK800 skirting with 45-degree mitre cuts for internal and external corners.
FR MDF SK800 must be screw fixed to steel frame into every stud at a maximum distance of 600mm centres. (Minimum of 2 fixings per stud up to 90mm wide, minimum of 3 fixings per stud for 135 to 185mm wide and minimum of 4 fixings per stud for 235 to 285mm wide). These fixing points must include 1 fixing 20mm from base of skirting board and another fixing must be through the centre of ribbed section at top of skirting board. Install with 5mm packers between the bottom edge of skirting and floor to allow for any subframe movement. Apply a bead of Bindex Fire & Acoustic Sealant between base of skirting and floor substrate.

Using 50mm CSR Fibretex 350 Rockwool. Cut and fix in between framing studs and rear faces of skirting boards allowing a maximum distance between the face of the insulation and the rear face of skirting of 14mm.
The height of the insulation must be 160mm minimum above top edge of skirting.

Using 16mm Fire Grade Plasterboard, Install plasterboard sheet to framework as per manufacturers specifications. Cut and fit plasterboard sheet as close as possible to door jamb and skirting edges. Preferable to have the factory finish plasterboard edge sitting on the top of SK800 skirting edge.

Brush down the top ribbed section of the skirting to remove all dust prior to plaster setting. Set all plaster joints including the joint where the bottom edge of wall plasterboard sits on top of the Shadowline skirting, using paper joint tape or FibaFuse tape. (Any tape used that does not meet the recommended tape types will void all warranty).
The tape should be positioned within the joint, so the bottom edge of the tape comes within 5-10mm of the bottom edge of the ribbed section of skirting. All plaster set and accessories must be installed to manufactures specifications and instructions.

Apply all coats of plaster set including top coats to all plaster joints and sand. All plaster set and accessories must be installed to manufacturers specifications and instructions.
TIP: to avoid the join between the skirting and plasterboard from cracking you must allow the jointing compound the dry fully between coats as per the manufacturer’s specifications and instructions. Drying times are approximately 24 hours in normal conditions or 48 hours in cool conditions between each coat.