How Much Insulation Do I Need In My Pitched Roof

Input length and width of area to be insulated.

How much insulation do i need in my pitched roof.

Pitched roof there are two options. Improve your home insulation with our high quality insulation products. If it is a pitched roof or if you plan to build a room above the garage with a pitched roof in the future the requirements will be different than if you are dealing with a flat roof with less than 10 degrees of pitch. A pitched roof is any roof that rises 4 inches or more per 12 inches.

The type of insulation you should choose will depend on the type of roof you have. Before doing anything else take into consideration the type of roof your garage has and plan out your insulation accordingly. Yes both types of roof can be insulated. Call us today visit our online store or contact us for assistance by email.

A flat or low slope roof rises from 1 inch to 3 inches per 12 inches. For a pitched roof where a breather membrane is not being used correctly it is always a requirement to have a 50mm ventilated airspace above any insulation between the rafters. Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job. Hitting amazing levels of 0 13w m will need 300mm of mineral wool or 180mm of rigid foam.

Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation. Depending on the specifics of the roof it may be possible to fully fill the rafter depth or in most cases leave a 25mm or 50mm air gap between the top face of the insulation and the sarking membrane. Only where a breather membrane is being used on its own without any other form of sarking or boarding over the rafters do you not need to ventilate. Warm deck cold deck or inverted roof.

The simplest and cheapest roof insulation is the classic cold. This calculator is to be used as an estimating tool only. What depth of roof insulation should i install. According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on the circumstances.

The recommended depth of blanket style insulation glass or mineral wool for a loft is 250 to 270 mm. Cold loft insulation for pitched roofs. Flat roof there are three options available. Do not use a hammer and nails to fix the battens the vibrations through the roof may cause damage to the roof covering especially where the roof is old either use screwdriver and screws or a nail gun.