Flat Roof U Value 2013

The required u value will depend on the location of the project england scotland or wales type of building domestic or non domestic and the application floor wall or roof.

Flat roof u value 2013.

Epdm rubber roof covering 19mm ply 50mm ventilated air layer protect vp400 plus lr membrane sip at specified thickness protect vc foil ultra insulating a vcl 25mm service void 50mm gyproc thermaline super. 0 25 column a is for extensions where the existing dwelling s walls and roof u values are worse than 0 70 w m k in the walls and worse than 0 25 w m k in the ceiling. U value of a flat roof. Here s my 2 cents and insulation guide for a cold flat roof concrete slab floor internal stud wall and to find out what type and thickness of insulation.

Column b is for other extensions upgraded existing thermal elements non exempt conservatories and conversion of unheated. A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value. Thickness varies according to the manufacturer s specifications. This is placed over the roof joists and a board normally external ply is laid on top.

Insulation for flat roofs pitched roofs and balconies and terraces. The tables below show the suggested u values in england wales and scotland. The thermal transmittance or u value of the complete roof system is calculated in accordance with established international standards. These are expressed as a u value which needs to be achieved.

To comply with part l of the building regulations 2010 all roofs to rooms except those in unheated buildings should be thermally insulated to a maximum u value of of 0 18 w m k. Insulation for walls including cavity walls solid walls and timber or steel framed walls. State applicable energy ashrae zone minimum r value state local ms mississippi ashrae 90 1 2010 2 r 20. For the majority of flat roofs built up in a series of material layers each of a consistent thickness and performance the most appropriate calculation type is the combined method detailed in bs en iso 6946.

Flat epdm roof description. State only ky kentucky 2013 kentucky building codes 4 r 25 state local la louisiana 2009 iecc 2 r 20 3 r 20. Get a u value calculation from our free online u value calculator or our technical department. R value state local al alabama 2015 alabama commercial energy code 2 r 25 3 r 25 state.