Bitumen roofing felt which are impregnated with bituminous impregnating agents. These roofing felts are build up of multiple layers of high performance felts and mastic asphalt over an insulated timber or concrete flat roof deck.
Felt (Hessian) is a high quality bituminous waterproofing membrane with Hessianascentrecore.lt conforms to IS: 1332:1993 type 3 Grade 1.
It is produced by saturating the centre core of hessian with straight grade bitumen and then coating it further on both sides with industrial grade oxidised Bitumen. Mica is then sprinkled on the bitumen on both sides to protect it from Ultra Violet rays and also to prevent adhesion.
This has a fibreglass centre core instead of Hessian. Straight grade and oxidised bitumen are used for impregnating and saturating the centre core of the fibreglass. This conforms to IS 7193/1994 Cr. Both The Great Bengal Felt Hessian and FG are tested and tried waterproofing membranes and offer total impermeability to water. Both are easy to apply, easy to repair and maintain.
Both are used for basement and roof waterproofing and many different types of surfacing such as
Application Methodology:Surface Preparation
Krishan Kumar Nagpal
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