Insulating roof rafters

Because heat escapes easily through the roof , uninsulated rafters can make your energy bills go up when you turn your heating system on. While attics, especially in older homes, are rarely insulated , you can easily insulate yours with the . If you know the insulation boards are going to be left unfinished for some time, run duct tape across the. Insulating the rafter space will give you a warm loft.

This means insulating between or below the sloping beams that form the construction and support a sloping roof. The rafters are joined together by a horizontal ridge board at the top and tied together by ceiling joists at the bottom.

Having chosen to insulate your rafters and . High performance PIR insulation boards for use in between rafters in loft conversions. Start your U- value calculation. How you insulate your attic depends on whether you want a cold or warm roof space. A cold roof requires insulation at joist level to stop heat escaping through the unused roof space. A warm roof is insulated between and under the rafters of the roof itself.

The recommended depth for insulation has been increased . It creates a breeding ground for mold and mildew and ruins the air-trapping pockets that block heat flow.

Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. There are two basic rules of thumb to remember which can be helpful when deciding where to place insulation. First, always place the insulation tight to the living space.

This means that it should be applied immediately behind any finished surface in a heated room. The insulation should not be installed in the roof rafters. Thanks everyone for your insight. Best method for insulating attic roof rafters.

When insulating a pitched roof at rafter level there are a number of key design considerations which will affect the build-up of the roof and the choice of insulation. In this blog post we explore some of the options available. Firstly, just to make it clear, when we are talking about rafter level we mean the timbers that support the . Stone wool solutions for application in between the rafters , which provides thermal, fire and sound protection in a building.

Heat rises, and therefore the Building Regulations requirements for heat loss through roofs are more stringent than those for walls. Your choice of roof insulation will depend on your roof type (flat or pitched), its structure (depth of the rafters ), and your willingness to invest. In most cases, extra investment . It is less expensive to build a conventional cold roof , with the required insulation usually mineral wool placed in the ceiling joists above the top floor.

However, a cold roof insulated using wool rolls is useful only for storage. To undertake a full conversion and create space, the insulation should be placed at .

Ballytherm Polyisocyanurate insulation is the ideal material to use for insulating in-between the rafters. The pages within this section provide design guidance, design details, installation instructions and advice on sitework. Custom sizes are also available on all product ranges. For more information call our . What should I be using to insulte this and . I have hatches around the side walls.

I then have boards over the joists so I can used the loft for storage. To provide ventilation in a roof that is insulated , install special rafter vents. These are stapled to the underside of the roof sheathing, between rafters. They allow air to move behind the insulation so the roof stays nice and cold while the room inside is insulated against the cold. Make sure the eave vents at . You can buy air ducts that staple to the inside of your roof above the eave vents and fit between the rafters.

The will hold open an air gap of approximately inch to allow airflow past a layer of insulation. You should be able to find them . This is fitted above the rafters and .