BPM planning guide
Open & Closed Timber Panels
Understand what is prepared in the factory and what remains for the site.
Open panel construction
An open timber panel generally contains framing and sheathing, with the rest of the wall assembly completed through later work. The particular supplier defines the panel build-up. This approach can leave greater flexibility for site-installed insulation and services, while requiring the site programme to coordinate more activities.
Closed panel construction
A closed panel incorporates more of the wall assembly before delivery. Insulation, membranes, linings and other components may be included according to the specified product. Closed panel is not one universal specification: ask exactly what arrives and what must still be completed.
Compare responsibilities
For either approach, establish responsibility for service routes, airtightness layers, cavity barriers, connections and protection from moisture. A factory-completed panel still relies on correctly designed and installed site junctions.
Plan installation
The level of factory completion can change component weight, lifting requirements and access needs. Coordinate foundations, delivery sequence, lifting, temporary stability and weather protection with the chosen supplier and installer.
Choose against the project brief
The right choice depends on your design, supply scope, site access and delivery arrangements. BPM can help compare the packages in a consistent format, rather than assuming that one panel type is always better or cheaper.