How Much Insulation Do I Need In My Roof

These minimum insulation levels are higher if your roof has an upper surface absorbance value of more than 0 4.

How much insulation do i need in my roof.

Also your building codes may dictate how many and which kind of vents you need to use. If you do have existing roof insulation the first thing to do is to check the depth if there is only 25mm of insulating material then this is likely to date back to the 1970s as this type of. For a warm loft you install insulation directly under the roof in the plane of the roof s pitch slope. Roofs and ceilings work in conjunction when it comes to insulation.

If you re concerned about your building s insulation the best thing to do is talk to your roofer. And there s even more good news. For example cathedral ceilings built with 2x12 rafters have space for standard 10 inch batts r 30 and ventilation. Inspecting your attic insulation.

It lasts for more than 40 years and should pay for itself many times over in energy bill savings as the cost of loft insulation is comparatively low. You can usually get this by gluing or fastening rigid foam sheets to the joists underneath the floor and filling gaps with spray foam from a can. Where to install insulation. As with any type of insulation you need to make sure that the roof is dry and in good condition before any insulation is added.

Floors don t need as much insulation as attics. We do not recommend that you do this. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. A total value of r 13 is recommended in southern climates and r 30 is recommended in northern ones.

Use our free insulation calculators to find out how much insulation material you need. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. So fitting insulation in your loft attic or roof space is a great way to improve your home s cosiness factor. Install insulation under the roofing material to reduce radiant heat gain.

The hot roof design allows more insulation to be installed in the roof cavity as the need for a vent space is eliminated. If you want to use your loft as a heated room then you need to take a slightly different approach and create a proper room in the roof. They can explain local codes and how many vents they intend to install on your roof.