How To Achieve Roof Insulation Over Decorative Ceilings

Measure the depth of your current insulation.

How to achieve roof insulation over decorative ceilings.

For an addition the usual approach is to use the prescriptive method. However you need to leave an air gap of 20mm between the insulation and your roof. Insulating fiberglass ceiling tiles are the perfect solution for jobs that require a lay in ceiling panel with access above and high r value. R 38 is the industry standard and the minimum thickness for r 38 is 12 inches.

They are made from a rigid 3 thick fiberglass with a thin vinyl laminated to the face providing a stellar nrc value for noise absorption in the room and a fantastic r value for insulation and noise blocking. Insulation should be installed right to the eaves so the batt is 50mm over the outside wall. They are made from a rigid 3 thick fiberglass with a thin vinyl laminated to the face providing a stellar nrc value for noise absorption in the room and a fantastic r value for insulation and noise blocking. A second layer of roof sheathing and roofing material caps the assembly.

Measure the area needing insulation. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. The sheets of insulation are held in place with furring strips that also create a ventilation channel. If your current insulation is only 5 inches deep you ll need to add seven inches of insulation to achieve the 12 inch r 38 rating.

Perhaps the best performing arrangement is adding a four to six inch layer of low gwp rigid insulation to the roof deck. How you will tackle this will depend on whether there is an existing ceiling the type of external roof covering and how much headroom is available. Insulating fiberglass ceiling tiles are the perfect solution for jobs that require a lay in ceiling panel with access above and high r value. Calculate additional insulation needed.

Additional insulation can be placed between the rafters using batts dense pack or low density spray foam to reach the desired overall r value. Where it s not technically feasible to achieve a u value of 0 18 w m k a value of 0 35 w m k is the target and for a listed building or where 0 35 w m k is simply not achievable 0 70 w. Interior wood framed ceiling insulation.