8th January 2026 How do you install wainscoting? The installation process for wall moulding panels begins with measuring your wall. You must then mark desired heights and attach the timber panel to the surface. After this, secure the level baseboard and add versatile stiles and horizontal rails to steady the layout. That’s the basic framework, which then requires completing by filling gaps or nail holes. You can use a sand smoother or wood filler to complete the finish.