Solar Control by Façade Orientation

Why it matters at project stage

Low-angle light may dominate east-facing rooms in the morning and west-facing rooms later in the day, while south façades vary seasonally. North-facing rooms can still need privacy or screen-glare control.

Solar control is not simply room darkening. It balances daylight, glare, outward view and night-time privacy, with façade orientation and hours of use informing the number and role of each layer.

Information required

Review solar exposure times, surrounding obstructions, glazing data, room function, glare locations, view requirements and the distinct roles of internal and external shading.

Verify screen openness, blackout performance and other technical values from the selected manufacturer data. Glazing, edge gaps, installation method and window geometry also influence the result.

Reaching a project decision

Internal treatments support glare, light and privacy control; external shading is a separate performance layer requiring project-wide assessment. Select fabrics against actual transmission and view objectives.

Use “Are exposure times understood” and “Were surrounding shadows considered” as decision gates for this subject. Compare any viable alternatives against those two project-specific questions, then document why the selected approach answers them.

Coordination through delivery

Share objectives between the façade consultant, architect, lighting designer and curtain specialist. Verify any sensors or controls with their manufacturers and the controls team.

Define the daytime and night-time role of every layer, then coordinate the tracks, pocket and controls around that sequence. Use project-specific objectives rather than a fixed energy-saving claim.

Before handover, resolve “Is glazing data available” and “Were glare locations checked” with the named project parties. Record the answer under the relevant opening or room reference so a later site, material or programme revision can be assessed against the correct approval.

Recording and verifying the decision

For solar control by façade orientation, the approval record should identify the opening or room, current drawing revision, responsible party and date. Attach the dimensions, samples or system information needed to evidence “Are internal and external roles separated”; mark superseded decisions explicitly rather than relying on verbal instruction.

The release checklist for this guide is: Are exposure times understood; Were surrounding shadows considered; Is glazing data available; Were glare locations checked; Are internal and external roles separated. Any unanswered point remains an action with a named owner and decision date, not an assumed instruction to proceed with production or installation.