3 Layer Felt Roof Specification

The covering which makes them water tight can be achieved using various products with 2 standing out as the industries norm.

3 layer felt roof specification. The membrane is then attached to the insulation. The system 17000 bitumen felt membrane is continually tested and refined and by. This can be avoided by starting the second layer with a half width roll or if necessary a full width sheet can be cut down to suit after it has been cut to length. 2 layer torch on bitumen felt waterproofing for flat and pitched roofs.

Type 3 type 3 glass fibre based felts are less durable and are only suitable for intermediate layers but can be used as a base layer when partially bonded. It is essential that the joins do not coincide with those of the first layer. Giving the benefit of longer lasting resistance to uv rays this method of laying flat roofs has a lot of advantages and is sure to be a fine choice for your dormer extension or anywhere else you have a flat roof. Offering an upgrade on the old fashioned bitumen and stone chip system of felt roofing the 3 layer felt roof system has changed the way these roofs are laid.

A compound known as modified. Type 3g is perforated and can be used as a venting base layer to give a. Three layer felt system three layer. 1st layer 2mm sbs felt nailed to roof decking 2nd layer 2mm sbs felt fully bonded by torch on method 3rd layer 2mm sbs mineral felt fully bonded by torch on method this specification carries a ten year guarantee.

The first being a 3 layer felt systems and second grp glass reinforced plastic. For the third layer of a three layer roof granulated mineral surface. The torch on felt solution relies on a three layer system which will require two levels of underlay underneath the cap sheet. The second layer is another layer of underlay felt but this one is bonded by adhesive to the first nailed layer.

Bailey system 17000 is best suited where a high performance product is required. Sketch 1 3 basic design warm and cold roofs householder s guide to flat roofing in a flat roof the waterproofing is. The majority of all loft conversions will have a flat roof constructed to them.