Cold Flat Roof Verge Detail

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Cold flat roof verge detail.

Typical mansard edge detail warm roof. Refurbishing an existing timber joisted flat roof which has no insulation. Grp flat roofing systems dryseal grp component based roofing system. A flat roof must be strong durable and stable throughout its lifetime.

Edge detail 2 welted drip to verge. This arrangement allows the deck to become cold. Cold flat roofs warm flat roofs inverted flat roofs green flat roofs solar flat roofs. Basically there are two options to choose from when insulating a flat roof.

In a cold weather such roofs are inherently prone to condensation which can cause material decay and deterioration. Cold roof un insulated cdeckun pdf. Verges are designed to stop rain driving over the edge and are formed after the top sheet has been applied. Installing a warm roof can be extremely straight forward and simple to do.

A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. The fascia board upstands the roof deck by 50mm. How to lay a felt roof using cold adhesives a guide to installation a flat roof using three layers of roofing felt with cold adhesive. It must provide adequate protection against the elements keeping the buildings structure and interior dry.

A cold flat roof is one where the insulation is between or between and below the roof joists. This is used for refurbishment e g. The insulation is below the deck but above the plasterboard. Typical mansard edge detail cold roof.

Flat roof ventilation allows for the circulation of air in the property particularly for warmer rooms in residential buildings. As well as the small selection of roof detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications. There are two types of flat roof systems warm and cold roofs which affect the positioning of the ventilation. Additional construction details drawings.

When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. There must be an adequate void minimum 50mm between the deck and the insulation traditionally mineral wool to allow free movement of air and to prevent moisture vapour being transmitted from the building outwards where it could condensate in the roof. Cold roofs in the case of cold roofs the residential flat roofs have the waterproof placed directly on the deck and any insulation would be placed above the ceiling. When thermal insulation is placed below the deck the ventilation must also be on the underside.