How Much Insulation Do I Need In My Roof

They can explain local codes and how many vents they intend to install on your roof.

How much insulation do i need in my roof.

Roofs and ceilings work in conjunction when it comes to insulation. 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. Use our free insulation calculators to find out how much insulation material you need.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. So fitting insulation in your loft attic or roof space is a great way to improve your home s cosiness factor. 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. If you can t install cold loft insulation because for example you re using your loft as a living space you will need to consider warm loft insulation.

Also your building codes may dictate how many and which kind of vents you need to use. For a warm loft you install insulation directly under the roof in the plane of the roof s pitch slope. These minimum insulation levels are higher if your roof has an upper surface absorbance value of more than 0 4. We do not recommend that you do this.

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. 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. 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.

A total value of r 13 is recommended in southern climates and r 30 is recommended in northern ones. All you need to do is input the size of your loft or roof space. 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. For example cathedral ceilings built with 2x12 rafters have space for standard 10 inch batts r 30 and ventilation.

Unvented hot roof design cathedral ceilings are also an option. 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. Inspecting your attic insulation.