An extra floor requires coordination of design, existing construction and implementation.
Investigate what is already there
The existing construction forms the basis for a roof structure. Collect data about floors, load-bearing walls and foundations. A recent photo alone does not tell what these parts can carry.
Discuss the choice of materials at an early stage
The choice for a light or heavier structure influences the design. Bespreek ook installaties, cladding and the new roof structure, so that the total weight is taken into account.
Align the disciplines
The architect or architectural designer, structural engineer and contractor each need their own information. Capture design changes and distribute the same revision to everyone.
Include the entire home in your information request
The roof is only the first part that changes during a structure. Loads must be removed via floors, load-bearing walls, columns and foundations. That is why drawings of lower floors and the substructure are also relevant. Mention previous renovations, major openings and unknown construction parts. Discuss what recording or studies are required before the design is finalized. A lightweight construction method does not automatically eliminate this information need.
Work out construction and residential design together
Stair position, free height, facade layout and installations influence the available space for construction parts. For example, a late change to the stairs may require a different floor opening. Therefore, compare the main choices with the constructive design before ordering details. Also discuss the connection to the existing roof and the construction phase. Ask what documents the supplier and contractor need for their own production and assembly preparation.
Your preparation in four steps
- Collect archival data
- Prepare preliminary design
- Name materials and installations
- Assess connection to existing construction
Frequently asked questions on this topic
Is a light roof structure always possible?
A low net weight can be beneficial, but is not an automatic confirmation. Use load, wind, connections, stability and the existing carrying route are also relevant. The structural engineer must determine what information about the home and foundation is required to assess the design.
Which drawings are needed for a roof structure?
Collect the new design and available drawings of the existing foundation, floors, load-bearing walls and roof. Add information about previous breakthroughs and renovations. Indicate which data is missing. The structural engineer then determines whether recording or additional research is necessary.
View the associated structural calculation, create your preparation list or take the guides and checklists along to the consultation.