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NEODYL
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Catalog excerpts

NEODYL - 1

Roof details and connections Waterproofing of roof details and connections

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NEODYL - 2

Roof details and connections Attention : the information herein is a general guideline, but does not take into account restrictions or special instructions related to the bearing element, to certain insulations, to the geographical location, to the structural configuration, etc. This information does not relieve the professionals from obtaining full knowledge of the reference documents (prevailing Local Technical Standards, Technical Assessments, Installation Specifications, etc.) This entails consulting them in their integral textual form. Again this document is only a guide;...

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NEODYL - 3

Contents Rainwater outlets Definitions General layout guidelines Main reference documents Gutters and drain channels Definitions Composition Minimal section Dimensions Waterproofing Thermal insulation boards Standard description Definitions – Slopes Central valleys Eave valleys Definitions Standard description Rainwater outlets Shape and sizing General case Special case Composition Waterproofing connection Overflows Special cases of roofs designed to temporarily retain rainwater Standard description Roof penetrations General guidelines Connection to the waterproofing Standard description...

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NEODYL - 4

Roof details and connections Rainwater outlets Definitions The rainwater outlet structures include: Rainwater drain structures: Gutters on non-accessible roofs and drain channels on accessible roofs. valleys. The rainwater outlets: Rainwater outlets. rainwater downpipes, not covered in this booklet. overflows. General layout guidelines The structures constituting the rainwater outlets shall be laid out so that: each rainwater outlet drains the water from a surface: 700m² in the general case. 350m² in the case of a rainwater outlet in the form of a drain channel on a steel-deck roof. 200m²...

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NEODYL - 5

The drawing hereunder suggest several ways of setting up rainwater outlets on roofdecks. One slope roofdecks 1 - without drain valleys 2 - with drain valleys Two slope roofdecks 2/ avec besaces 3 - without drain valleys 3/ sans besace Four slope roofdecks 4 - with drain valleys set inside 5 - with drain channels on edges 4/ avec besaces intérieures Diamond point roofdecks 5/ avec encaissements extérieurs 6 - with one water outlet 7 - with four water outlets 7/ avec quatre naissances Icopal  |  12, rue de la Renaissance - F-92 184 Antony CEDEX  |  Tel. : +33 1 40 96 35 00 - Fax :...

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NEODYL - 6

Roof details and connections Gutters and drain channels Definitions Gutters are structured to drain rainwater, generally of rectangular section, installed on non-accessible roofs. They are not accepted in mountain climate. Roofs with substrate in masonry or concrete: they can be boxed between two roof slopes or corbelled out. Roofs with bearing element in steel or timber and wood derivatives: boxed gutters are prohibited; only gutters that are corbelled out are accepted. Pitches: all pitches are accepted, including zero pitch. Drain channels are structures that collect rainwater, generally...

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NEODYL - 7

Dimensions After installing any waterproofing and insulation, the dimensions comprise: Real Height (RH): waterproofed height of the shortest vertical wall. Usable Height (UH): height to be taken into account for the calculation of the section necessary to handle the water drained; it takes into account (if possible) a water trap of 5cm. The water trap is not necessary in the case of gutters that are corbelled out or boxed gutters with continuous waterproofing membrane. Gutters with discontinuous waterproofing membrane RH without low limit for adjacent slopes of slope 5% 0.04m RH 0.15m for...

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NEODYL - 8

Roof details and connections Waterproofing Thermal insulation boards It is preferable to select bitumen surfaced thermal insulation boards, enabling the installation of waterproofing by torching: bitumen surfaced mineral wool; bitumen surfaced fibrous perlite; bitumen surfaced cellular glass. They are to be fixed in compliance with the manufacturer’s specifications. Concrete gutters Sidewalls, bottom Top layer, Paradial S, torched Top layer, Paradial S, torched 1st waterproofing layer, Paradiene 35 S R4, torched 1st waterproofing layer, Paradiene 35 S R4, torched Bituminous Siplast Primer...

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NEODYL - 9

Valleys Definitions – Slopes The valleys drain streaming water. There are several kinds: Central valleys, formed by the intersection of 2 roof slopes; Eave valleys formed by the intersection of a roof slope and an upstand. The accepted slopes are: all slopes, including the zero slope for roofs that are not accessible, service roofs, gardens or accessible roofs, with slabs on pedestals. Important: in the case of bearing elements of steel deck sheet, the local technical standards in force specify the minimal slope of the valleys depending upon the building’s configuration and its effect upon...

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NEODYL - 10

Roof details and connections Rainwater outlets Shape and sizing The section of the rainwater drain fitting can be constant (cylindrical drain fitting) or variable (tapered drain fitting). In the case of side drains (fitting axis close to horizontal), existing obearingelement of ribbed steel deck sheet, the fitting section shall be rectangular and its sizing shall comply with the relevant technical standards. The final section of the drain fitting, connecting to the rainwater downpipe is determined depending upon the surface areas of the roofs drained and on the fitting’s shape (see table...

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NEODYL - 11

Special case Drained surfaces equal to or less than 287m² per downpipe with cylindrical drain fitting water outlets for the nonaccessible roofs on masonry bearing element. Inside diameter of the pipes (cm) Horizontal surface area of the roofs drained (m²) Insulation Waterproofing Grating Protection Barrier grating The rainwater drains can be, for example: of lead, thickness 2.5mm (diameter limited 0.15m in the case of roofs with metal bearing element), protected inside by dipping in hot bitumen, in the case of concrete slab protection; of copper, thickness 0.6mm; of zinc, thickness 0.8mm...

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