Felt Roof Upstand Details

If you just took your waterproofing up to the edge of the roof and didn t have an upstand the local construction would get saturated.

Felt roof upstand details.

Joints should be continuous through the vertical upstands walls and edges of the. Reputable flat roofing manufacturers should have appropriate detail drawings for most penetration requirements. There is no limit on the height to which the single ply membrane can be bonded up a flat roof upstand. Laying a felt roof is hard manual work which once started needs to be finished you cannot leave it.

For conventional flat roofs this height is taken from the surface of the waterproofing but for landscaped roofs it should be taken from the surface of the finished landscaping. Practical considerations however are likely toread more. Attention to detail and an ability to measure are essential. This will ensure that british standards and codes of practice are properly maintained including minimum 150mm upstands and mechanical restraints at waterproofing termination points.

On upstands apply adhesive to both the felt and surface of the upstand. Technical resources for your flat roof project. 150mm upstand to brickwork with chased joint single ply detail. On exposed membrane roofs the upstand height is measured directly from the membrane surface.

Do not cut the felt straight onto the roof or already laid felt always using a cutting board. Rainwater can build up on a roof during heavy storm events and it may be stating the obvious but unless checked this water could spill into building and saturate construction elements electrical installations as well as internal finishes and effects. When constructing flat roof waterproofing systems good practice dictates that the minimum required height for upstands is 150mm. As long as the 150mm minimum upstand height is achieved then theoretically the upstand can extend to any height to suit the roof design and roof edge detail.

Iko sig design technology upstands acknowledge the fact that rainwater can build up on a roof during heavy storm events. Have adequate provision for the additional loads where a flat roof is to act as a roof terrace roof garden or car parking area have adequate provision for movement in larger roofs particularly where the span of the roof deck changes e g.