MiTek Posi-Attic Trusses: Maximising Living Space
MiTek Posi-Attic Trusses are innovative roof trusses that integrate the strength and versatility of Posi-Joist metal web joists into the bottom chord, creating spacious, functional attic areas. Designed to maximise living or storage space, these trusses combine lightweight timber with MiTek’s patented Posi-Strut steel webs, offering greater room spans than conventional attic trusses.
The open-web design simplifies the installation of utilities, making Posi-Attics ideal for residential and commercial projects seeking to optimise roof space.
History
MiTek introduced Posi-Attic Trusses as an evolution of its Posi-Joist technology, responding to the growing demand for usable attic spaces in the early 2000s. By incorporating Posi-Joist metal webs into attic truss designs, MiTek enabled builders to create larger, more open attic areas without compromising structural integrity. Enhanced by MiTek’s PAMIR software, which includes specialized tools for Posi-Attic design, these trusses have become increasingly popular, particularly as Mechanical Ventilation and Heat Recovery (MVHR) systems require flexible utility routing. Today, Posi-Attics are widely used across the UK, Ireland, and other regions, supported by a network of licensed manufacturers.
Benefits of Using MiTek Posi-Attic Trusses
Increased Living Space
Spans greater distances than conventional attic trusses, allowing for wider, more open rooms and maximizing usable attic space.
Utility Integration
Open-web design provides a service void for easy, hassle-free routing of pipework, ducting, and MVHR systems, reducing installation time.
Cost Savings
Eliminates the need for load-bearing intermediate walls, reducing material and labor costs while speeding up construction.
Structural Performance
Combines timber and steel for a lightweight yet robust system, delivering superior strength and stability with minimal vibration.
Design Flexibility
Customisable depths, widths, and configurations, tailored to project needs using MiTek’s BIM-compliant PAMIR software.
Enhanced Acoustics and Fire Safety
Meets stringent fire resistance (up to 90 minutes) and acoustic performance standards, ideal for residential applications.
Rapid Installation
Pre-fabricated and delivered made-to-measure with detailed 3D models, ensuring quick and accurate on-site assembly.
