Fire Mortar (Product 6)
An asbestos-free dry mix, add water and then mixed like plaster. Shuttering boards are not required. Lay Rockwool slabs into the opening, leaving the required depth for the mortar. Upon setting, the mortar is load-bearing. Drilled with wood bits to allow for the installation of services. Used in conjunction with either intumescent slabs or also non-fibrous slabs, the mortar provides a permanent fire stopping solution for load-bearing floors, walls and ceilings. For areas over 600 x 900mm, it’s essential to reinforce with 30mm chicken wire mesh, fixed with FB/C straps and support battens. Refer to the Technical Data Sheets for full details of the correct installation of mortar.
In the case where pipes, services or cables pass through the surface of a wall or floor, it is essential to fit Intumescent Wraps, Firoblok or Intumescent Collars to reinforce fire protection.
Available in dark grey, however also available in pink to identify mortar as fire-rated if required. Should you wish, we can supply a light aggregate to add to the Fire Mortar in 6.25kg bags.
ADVANTAGES
The following fire ratings can be achieved with the corresponding thickness:
Up to 6-hour protection: 100mm
4-hour protection: 25mm
ORDER REFERENCES / SIZES
REGULAR GREY-COLOURED PRODUCT
FM25 25 kg regular fire mortar GREY-coloured
FM05/A 25 kg plus 6.25 kg aggregate additive = 31.25 kg total dry mix GREY-coloured
NEW PINK-COLOURED PRODUCT FOR EASY IDENTIFICATION AS FIRE MORTAR
FM25/P 25 kg PINK-coloured fire mortar
FM25/AP 25 kg plus 6.25 kg aggregate additive = 31.25 kg total dry mix PINK- coloured
SUP Metal Support Batten for large floor openings (see illustration top of page), price per metre
MESH 30mm wire mesh x 1200mm width, sold per linear metre run
3-hour protection: 12mm
2-hour protection: 6mm
1-hour protection: 3mm
IMPORTANT – This product is for use with intumescent slabs and must not be used by itself
- Application Instruction
- Downloads
For the 25 kg bag, add 4 ¼ to 4 ¾ litres of water, and mix like plaster. For floors, pour into the floor opening. For walls, apply over a Rockwool Slab with a trowel or float. 25 kg bag will fill approx. 8600 cm³ or 2 bags will fill 0.83 m² to depth of 25 mm.
Application into floor: For openings 600 mm x 900 mm, no wire mesh is required. Just fit Rockwool slab, fit Envirograf Protection around any services and fill over the Rockwool to the required depth, with the FM Fire Mortar. For larger openings, fit 50 mm RW4 or RW6 Slab where large areas over 1 metre wide, use Envirograf® Ref: SUP Support Bars (As Picture) under Rockwool. Fit 30 mm wire mesh over the Rockwool, cutting around services and wiring to the services. Fix wire mesh all around the perimeter of the hole, bend up the wall or floor and fit with Envirograf® FB/C Metal Battens to support the mesh.
Fit Envirograf® Fire Protection Wraps around pipes and electrical services, Intumescent Pads inside and Trunking Pillows for Cable Trays. Product 40 Fire Proof Sponge around ventilation trunking. Then mix FM Fire Mortar and pour into the opening to the required depth.