Home > Companies > Ash & Lacy > Ashjack over roof conversion systems

Ashjack over-roof conversion systems are constructed using a bespoke, lightweight, steel framing system, which is primarily designed to create a variety of pitched or curved roof structures that incorporate ridges, hips, valleys soffit/ fascias and overhangs.

Product range:

  • Ashjack propped rafter system.
  • Ashjack curved rafter system.
  • Ashjack lightweight spanning truss system.

Features and benefits:

  • Provides a permanent solution to flat roof failure.
  • Can accommodate a variety of roof pitches.
  • Can support both modern and traditional over-cladding systems.
  • Systems individually designed and tailored to suit structural requirements.
  • Excellent strength to weight ratio,
  • Cost-effective – can be designed to fit almost any budget.
  • Minimum disruption to building occupants.
  • Dramatically upgrades building aesthetics.
  • Provides opportunity to upgrade thermal performance.
  • Life of building considerably extended, and future maintenance costs reduced.
  • Ideal for new build projects; provides a lightweight alternative to timber trusses or heavy hot rolled steel sections.
  • Insurance backed latent defects warranty available.
  • BBA and LANTAC approvals.

Related literature

The following content references this product:

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
15-65-75/145 Light steel framing system

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Ash & Lacy


+44 (0)121 525 1444

Product reference

[Ashjack propped rafter system]
[Ashjack curved rafter system]
[Ashjack lightweight spanning truss system]

Manufacturer details

Bromford Lane,
West Bromwich,
West Midlands, B70 7JJ
Tel +44 (0)121 525 1444
Fax +44 (0)121 525 3444
NBS Plus