AshGrid Firewalls

Many firewall systems incorporating glasswool insulation require all the insulation to be trapped between the bar and the outer sheet. This can cause unsightly rippling of the outer sheet during fixing and can create large voids in the insulation layer that can be detrimental to thermal performance. As Ash & Lacy firewall constructions effectively ‘share’ the insulation between the top sheet and liner sheet this is avoided.

Systems incorporating Rockwool insulation require all the insulation to be trapped between the bracket foot and the liner. Fixing through the insulation can make it difficult to locate and fix the brackets onto the rail flange and can leave the brackets prone to any “rocking”. This can result in an unstable wall construction with large voids in the insulation layer that can be detrimental to thermal performance. As Ash & Lacy firewall constructions effectively ‘share’ the insulation between the top sheet and liner sheet this is avoided.

The Ash & Lacy firewall construction and installation procedure addresses the above issues and generally provides a satisfactory “sharing” of the insulation to the top sheet and liner to create a thermally efficient and robust detail.

In the Ash & Lacy horizontal fire wall construction there is no requirement to lay thermal insulation over the top hat therefore avoiding unsightly rippling on the outer sheet.

Ash & Lacy firewall constructions allow a 140mm wall construction to be maintained. This meets the requirements of current Building Regulations.