BBA Agrément Certificate
Hot melt bitumen waterproofing green roof system.
A one-part hot applied rubberized bitumen membrane for use on inverted flat roofs, with limited pedestrian access.
Permaquik PQ 6100 is designed to accept minor structural movements and distributed loads without damage when used as described in Agrément Certificate 97/3336, although concentrated point loads may cause damage. On flat roofs, when used in an inverted roof specification including a minimum surface finish of 50 mm of aggregate, Permaquik PQ 6100 will achieve designation AA.
The membrane joins ‘new to old’ to form a monolithic bond when lapped with new hot material. It will self heal minor damage, in clean and dry conditions with light superimposed loads.
The membrane is to be applied by a Radmat Building Products Ltd approved contractor.
Concrete: Use traditional methods of concrete curing (i.e. water curing/wet coverings/paper/plastic sheets). Obtain approval from Radmat where concrete curing compounds (other than sodium silicate based) or release agents are proposed.
Precast concrete and concrete block: Decks to BS 6229 and BS 8217.
Metal/ plywood/ timber boarding: Surfaces to be free of oil, rust, paint or coatings which may inhibit the bond. Plywood must be WBP with durable ply species.
Remove laitance, curing compound and form release agent from surface of concrete slabs by mechanical scarification, grinding, blast cleaning or chemical cleaning. Remove and smooth away any fins and nibs. Make good tie holes and damaged area with latex modified patching mortars, ensuring edges are slightly undercut. Existing surfaces must not be power washed prior to carrying out any works.
Ensure all detailing and flashings are completed before installing the membrane.
Primer PQ 6109 – a bitumen based primer for concrete surfaces. Allow sufficient drying time (after rain, allow at least a day) before applying membrane (will not bond to surface conditioner which has not dried).
Radmat recommend the use of an extruded rigid polystyrene insulation in accordance with BS EN 13164 or the subject of a current BBA Certificate.
Radmat Filter Fleece laid loose with 150 mm laps prevents migration of fire particles into a drainage medium, and prevents sharp stones, flints etc. from passing through the roof build-up. It is 3 mm thick and rot resistant. Trim the fabric to 50–75 mm above the ballast at the perimeter and penetrations. Extend fabric to outlets, ensuring not to cover or restrict water flow to the drainage outlet. Install additional fabric around penetrations to prevent stone entry into the space between the penetration and the insulation.
Use pre-cast pavings to avoid wind scour of gravel ballast and/or as walkways (particularly at traffic concentration points). For up to 10% of the total roof area, install pavings directly onto insulation. In excess of 10% of the total roof area, use supportive pedestals to provide a 10 mm (min) drainage layer or air space between the rigid insulation and pavings. Provide additional ballasting of the roof’s perimeter and field to resist wind uplift.
Bitumen, natural rubbers and a blend of polymers
J30/150 Hot applied damp proofing
J30/20 Hot applied damp proofing
J31/130 Inverted roof coating
Permaquik PQ 6100
Primer PQ 6109, spray or roller applied at 7-16 m²/litre
Squeegee applied at 3 mm thickness. Brush reinforcement into the surface with 75 mm laps all round
Squeegee applied at 3 mm thickness. Embed coating protection sheet into hot membrane with 75 mm laps
Permaquik 2016 spun bonded polyester roll for general areas
Permaquik Butyl 1.45 mm PQ 2063 for minor movement or dissimilar materials
PQ 2016 polyester scrim strip over construction joints
Additional PQ 047/2063 butyl rubber over bridging joints
300 mm wide Radmat Radflex 125 double laminate movement joint over wider movement joints
|Minimum dry film thickness|
6 mm nominal thickness
Radmat Standard Protection Sheet
Radmat Heavy DutyProtection Sheet
Permaquik PQ 2450/2550 protection board, ___ mm thick
Liquid Plastics VCL
Termination and flashing bars
Bitumen compatible sealant
Bitumen compatible adhesive
Permaquik pitch pour sealant
Contact type Bonding Adhesive
|Standard product features|
Polyester reinforced polymer modified bitumen.
Permaquik PQ 2450/2550 protection board in the following thicknesses: 2.5 mm, 3 mm and 6 mm.
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