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Thursday, 20 September 2012

Techniques for insulating rafters and walls

insulating a granny flat
If you are converting the attic area into a living area, there are strict guidelines on the amount of insulation to be used.

Rafter depth is often an issue, as there is seldom enough depth to fit the recommended amount of insulation.  You may have to increase the depth by adding wood to the rafters.

Drywall will need to be insulation-backed. The frame-foiled type of insulation will need to be stapled across the rafters before applying drywall. An air gap is generally required. 

Always pay close attention to a manufacturer's specifications on installation. Consider using green insulation materials, such as recycled batts.

Using Recycled Batts

Recycled batts are a good option for conventional blanket insulation on rafters and walls. They are more eco-friendly and easier to position than conventional blanket insulation. Either type will need to be cut to fit the exact space between rafters or studs.


How to Lay Loose-Fill Insulation

Loose-fill insulation can be used as an alternative to blanket insulation. Bags of loose-fill insulation are easier to handle and more convenient to move into the attic, than blanket insulation. It is also easier to use when your attic is oddly shaped in design and layout (lots of odd blocks or voids). Loose-fill insulations are usually a more user-friendly installation option than batt-type blanket insulation. There are conventional and recycled loose-fill insulations.

Using Recycled Paper

insulating a granny flat in Australia
The greenest option in loose-fill insulation is shredded recycled paper. This is sometimes used in wall insulation, but it can also be blown into attic spaces using a blower-type applicator. Ensure that the correct depth has been blown in to make sure that thermal efficient results are achieved.

Laying Loose-Fill Insulation

First, clean crevices to remove any debris. To stop the loose-fill leaking out from under the eaves, create a barrier where the joists and the rafters meet using a small section of blanket insulation. You can use a blower pump and a hose to fill you roof /ceiling space with loose insulation made from recycled materials such as news paper. Move the hose around to prevent excess loose-fill to areas that need to be built up.
techniques for ceiling insulation

When leveled off, the fill should be level across the entire attic space. If you have electrical hardware such as recessed lighting, build a wooden frame around it to protect the loose-fill insulation from contact. You need to provide insulated light covers which can be purchased from all electrical outlets suitable for you particular type of lamp

Deep Filling

Deep filling can be done with loose-fill, but a more practical solution is to use deck boards above the loose-fill and combining the two creates a useable storage space in the attic. Always think about combining insulation — even if you don’t create a large storage area, the deck will provide safe access across the attic.

As long standing architects of building design aspects, the Nova Design Group  provide good advice when you are looking for the best solution to insulate your kithome.

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