Window Covering Measurement: Product Sizes, Mounting Choices and Responsibility

Choose the Intended Covering

Tell the provider whether you are considering blinds, curtains or a combination. Explain privacy, light and appearance priorities and show any selected product information. A measurement visit should state which product or fitting approach its dimensions support.

If you have not chosen a product, ask whether the survey includes advice or only measurement. Avoid treating one set of dimensions as suitable for every later product decision.

Agree the Mounting Position

Discuss where the covering and its supports will sit in relation to the opening. Handles, opening windows, doors and nearby fixtures can affect the workable arrangement. Ask the provider to record the proposed position clearly.

For curtains, finished height and opening space need to be considered alongside the support. For blinds, the fit and operating clearance depend on the particular product. See the separate curtain and blind installation guides for fitting questions.

Record Conditions Beyond Dimensions

Tell the surveyor about known surface conditions and restrictions on making fixings. Ask what assessment of the mounting surface is included and which conditions need further investigation. Dimensions alone do not establish that the planned installation is suitable.

High openings, furniture and unusual access should be recorded for the installer. If the survey and fitting are handled by different teams, ask how that information is transferred.

Understand the Measurement Record

Ask what written record you receive and how individual rooms or openings are identified. Clarify whether the recorded values are opening dimensions, finished product dimensions or an ordering specification. That distinction matters if you will order from another supplier.

Check how the survey deals with product allowances and fitting choices. Do not apply a generic allowance yourself when a provider is responsible for the order; ask it to explain the specification and acceptance process.

Set Responsibility Before Ordering

A measured-and-supplied package can have a different responsibility arrangement from a measurement-only visit. Ask who checks the final order and what happens if the supplied covering does not fit the agreed opening.

If you use one firm's measurements to order elsewhere, confirm what support each company accepts. Keep the survey, product specification and order confirmation together so discrepancies can be resolved against the same information.

Compare Measurement Services

• Number of openings and products considered.
• Product advice versus measurement-only scope.
• Mounting and access assessment.
• Written specification and order checking.
• Fee treatment if you proceed with supply or fitting.
• Revisit terms if the opening or product changes.

If renovation or decorating is still underway, ask when a final survey should occur. A later change to the opening, surface or selected product may make an earlier specification unsuitable.

Measurement Questions

Can I use the same dimensions for curtains and blinds?

Do not assume so. Each product and fitting position can need a different specification.

Does a survey guarantee any product I buy will fit?

Only rely on the responsibility actually agreed. Measurement-only and supplied-and-fitted services can differ.

Should I measure before building work is finished?

Ask the provider when it can issue final dimensions and whether a later check is needed.

Arrange Measurement With a Clear Purpose

Use the installer guide to compare support. Search with the proposed covering, project stage and ordering arrangements ready to discuss.