Is R9 more expensive than R7?

The difference is marginal, usually a small percentage rather than a meaningful budget factor. The bigger cost drivers are window size, opener type and glazing specification, not the choice between R7 and R9.

Can I mix R7 and R9 on the same house?

It is possible but not usually recommended, as the differing sightlines can look inconsistent from the street. Most projects pick one profile and use it consistently across all elevations.

Which is better for a conservation area?

Both are generally accepted, since they are specifically designed to replicate traditional timber joinery. The choice should be based on which sightline matches the age and style of your property, which is often exactly what a conservation officer will ask about.

Do R7 and R9 perform differently thermally?

No, both achieve comparable U-values, typically 1.2-1.4 W/m²K double glazed, because the glazing unit rather than the frame depth drives thermal performance. Choose based on appearance, not performance.

Product Comparisons

Residence 7 vs Residence 9 Windows

R7 and R9 are both part of the Residence Collection, but they are built around different sightlines and different periods of house. Here is how to tell them apart.

3 min read

Residence 7 (R7) and Residence 9 (R9) are the two most commonly specified profiles in the Residence Collection, alongside the flush R2. Both use the same foiled woodgrain finishes and hardware, and both meet the same Part L performance requirements, so the decision between them comes down to sightline depth and the age of the property they are going on.

It is a smaller decision than aluminium vs uPVC, but it still affects how the finished windows sit against your house, so it is worth five minutes of thought before you commit.

What actually differs

R9 has a deeper, chunkier 90mm sightline that closely mimics an early-Victorian or Georgian timber box sash, with pronounced ovolo mouldings and a heavier feel. R7 uses a shallower 70mm sightline that suits later Victorian, Edwardian and 1930s properties, where original joinery tended to be less heavy.

	Residence 9 (R9)	Residence 7 (R7)
Sightline depth	Approx. 90mm, chunkier	Approx. 70mm, slimmer
Best suited to	Georgian, early Victorian character	Late Victorian, Edwardian, 1930s
Moulding style	Deep ovolo, heritage box-sash look	Lighter, more streamlined moulding
Cost	Broadly comparable, R9 marginally higher	Broadly comparable
Glazing bar options	Full range, true bar and surface bar	Full range, true bar and surface bar

Practical considerations

Because R9 has a deeper frame, it can look slightly heavier on a smaller window opening, particularly in narrow Victorian terrace elevations. R7 tends to sit more comfortably in these situations while still delivering a timber-effect look that satisfies most conservation officers.

Match the profile to your house's original period where you can find evidence of it in old photographs or neighbouring untouched properties.
R9 generally reads better on larger, grander openings such as bay windows on a substantial Victorian villa.
R7 generally reads better on standard terrace and semi-detached window openings.
Both accept the same colour and glazing options, so this is a shape decision, not a specification one.

Which should you choose

If your house is a solid Victorian villa or you are trying to replicate a heavy original box sash, R9 is worth the marginally deeper frame. If your house is a more modest terrace, Edwardian semi or 1930s build, R7 will usually look more proportionate and is the profile we specify most often across Cumbria's smaller period housing stock.

Where the two get confused is assuming a deeper frame is always more authentic; on the wrong house, R9 can look overstated, and R7 is not a lesser product, simply a different sightline for a different era of joinery.

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