Retrofit Insulation Pitched Roof

Another key advantage of specifying a pitched roof is the ability to provide a very high level of thermal performance in these roof types whether you re looking to insulate at joist ceiling level for a cold pitched roof or at rafter level if a living area within a warm roof construction is desired.

Retrofit insulation pitched roof.

Retrofitting foam insulation on a roof recommended reasons for removing a roof s shingles. Roof edge detail overhang extended to hide the thickness of the over roofing rigid insulation. Pitched roofs are a common sight in the uk owing to their versatility and typical low maintenance requirements when compared to other forms of roof construction. Insulating a loft or attic wall in pitched roof space.

There is a requirement when refurbishing a roof to have a minimum u value of 0 18 w m k in england and wales but for a complete re roof in wales the minimum u value required is 0 15 w m k. These new roofs can be either low sloped less than 2 12 functional roofs or high pitched greater than 2 12 architectural roofs depending on the expectations of the building owner. How to retrofit a roof with insulation in my humble opinion i believe the only way to effectively and cost wise to solve the problem is to insulate from the top. On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit.

The use of metal retrofit roofs allows the flat roofed buildings to undergo a transformation into a sloped roof building. Installed a new fully adhered membrane to the top of the old board sheathing prior to adding all that rigid insulation. Roof covering insulating a pitched roof between and below the rafters is a very common roof insulation choice particularly for retrofit and refurbishment projects. Breather membrane in colours u value target.

Cover the roof with 6mil poly sealed at the wall line to the vb in the wall. When specifying the insulation for the pitched roof it is important that the thickness of insulation used achieves the required u value. Gable end detail overhang cut and then rebuilt to hide the thickness of the over roofing rigid insulation. See http solaralberta ca pdfs harold 20orr pdf we have done several roofs this way 1.

Good roof insulation is essential to ensure a building not only complies with building regulations but also achieves the desired thermal performance to ensure the comfort of its residents and energy efficiency of the building. The est target u value for the rafter level insulation of a pitched roof is 0 20 w m2k though much higher values are achievable.