Specifying termPIR ETX for the façade of a commercial building

Mark the exposed frame width, render line and sill position on a plan section through a typical window. Measure several windows. Frames set at different depths can require different cuts even where the openings are the same size.

Assign a detail from the selected ETICS documentation to each recurring reveal. Check that it covers the substrate, board type and thickness, and the render termination at the frame. Use that detail to measure the required profiles in linear metres.

CS(10/Y)120 describes the board under compression. Specifying anchors requires other information, including the load-bearing substrate, wind action and anchor performance in that masonry. Mark the designed boundary of each corner zone on the elevation.

Distinguish the board from the finished façade when checking fire performance. The reaction-to-fire class of the uninstalled termPIR ETX board is F at 20–49 mm and E at 50–250 mm. Check the classification of the specified complete build-up against the project requirement.

The ETX data sheet gives λD = 0.027 W/(m·K) from 20 mm up to but excluding 80 mm. From 80 mm up to but excluding 120 mm it gives 0.026, and from 120 to 250 mm inclusive it gives 0.025 W/(m·K). Pair each thickness in the schedule with its own value.

For example, the manufacturer lists a declared thermal resistance of 3.05 m²·K/W for an 80 mm board and 4.80 m²·K/W for a 120 mm board. At the window, a section through the wall-to-frame junction is also needed to assess heat flow.

Show the crew the print on the board before bonding starts. In this system the printed face goes against the wall. Check the first board before the adhesive conceals the marking, then stagger the joints in successive courses.

At the first opening, compare the cuts around the window corners with the system drawing. Check the plane of the boards and the profile positions before applying the reinforced base coat. Record the measurements for the crews working on subsequent openings.

Map the existing wall by the condition of its finish. Mark detached render, peeling paint and damp areas before positioning pallets so the delivery leaves repair areas accessible.

Once unsound layers have been removed, inspect the surface that will receive the adhesive. It should be sound, even, dry and clean. Where efflorescence is present, establish the source of moisture before covering the wall. Record findings against the scaffold bay concerned.

The standard board measures 600 × 1200 mm. Use effective cover for profiled edges. For each elevation, allow for cuts around openings, reinforcement, fixings, profiles and sill flashings as specified in the system.

Read the manufacturing date on every pack. If two batches arrive together, assign each its earliest installation date, observing the required one-month interval. Allocate packs to scaffold bays so the right batch is available as work proceeds.