Consider the new-to-existing junction
The meeting point may involve ceiling height changes, door reveals or altered cornices. Share drawings that show the connection rather than only the new floor area. The plastering scope can then include the transition details that will be visible once the rooms are furnished.
Price from a defined lining schedule
Room dimensions, ceiling shapes, board specifications and wet-area sections all help clarify the work. Ask the contractor to identify setting, sanding, edge finishes and any excluded framing work. A drawing-based estimate may still need checking against the completed frame before a final scope is agreed.
Link installation to site readiness
Let the installer know who coordinates the build and which trades need access before lining. Materials need a suitable delivery route and storage location. Discuss how the existing home will be protected while the new extension remains part of an active construction site.
Questions about extension plastering.
Can the extension use a different edge finish?
It can be discussed, but the junction to existing rooms should be designed deliberately. Include photos of nearby ceilings and your preferred finish.
Are plans enough for a final quote?
Plans are a useful start. The contractor may need to confirm framing, access and variations on site before finalising the price and installation schedule.
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