Roof insulation: optimally insulated roof

All about roof insulation

  • Roof insulation: optimally insulated roof
  • Different ways to insulate roofs to
  • the rafter
  • Intermediate or below the rafters
  • Roof restoration with vapor barriers
  • roof insulation
  • Flat roof insulation
  • Flat roof renovation
  • Moss stop for the roof

In front of a loft conversion, the owner should familiarize themselves with the provisions of the Energy Saving Ordinance ( Write the builders for certain insulation values ​​under the roof to reduce the heat requirement and running costs.

Roof insulation: optimally insulated roofThe cross-section of an optimally insulated roof

There are different forms of insulation. An optimally insulated roof possesses all: fire, sound insulation and thermal insulation. Consultations on this one gets in building and monument offices, architect or qualified handicraft companies. Well insulated roofs withstand temperature conditions, allow a comfortable living environment and minimize energy consumption - for a loft conversion the insulation is of course a prerequisite.

Different ways to insulate roofs to

In the insulation you have the option between the rafters, the insulation with vapor barriers and intermediate or below the rafters.

the rafter

Roof insulation: optimally insulated roof

The rafter is mounted above the roof rafters from the outside.
The advantage of the rafter is from a building physics and heat protection point of view in the solid insulation. Since no rafters interrupt the heat layer, there is less energy weak spots in the attic. In space the beams is visible, which guarantees an especially comfortable living atmosphere. You may need a permit from the planning authority, as the gable height and this could change the aesthetics of the house through the rafters. Connections to skylights or chimneys must be adapted to the changing roof height.

Intermediate or below the rafters

Roof insulation: optimally insulated roof

The intermediate or below the rafters is usually mounted from the inside. Here, the insulation between the rafters is made air-tight as a warm roof: the insulation is sandwiched over the entire height of the rafter without an air layer and protected on the inside with an additional airtight film from moisture. For this type of insulation both stone, and glass wool and natural insulating materials can be used. With the insulation between the rafters, the under-rafter insulation is often combined. Thus, the rafters are covered with a comparatively thin insulating layer on the inside and effectively reduce thermal bridges. Next, the structure can be as desired planked with plasterboard or covered with wood profiles.

Roof restoration with vapor barriers

Roof insulation: optimally insulated roofvapor barrier<br>Photo: Bauder

For roof renovation it is also possible with the aid of Dachsanierungs- insulation systems with special vapor barriers, air membranes so-called variable steam seal that insulation between rafters externally be introduced into the compartments between the rafters. This method is recommended if the roofing including roof battens is completely renewed. Thus, the inner linings for subsequent insulation must not be removed when converted attic floors and the rooms can still be used even during roof renovation. Our illustration shows a roof renovation with vapor barriers in cross-section: roofing material, roof batten counter batten and that additional insulation system, vapor barrier and the existing and added insulation between the rafters. The room-side panel did not have to be renewed. In principle, are only effective insulation when the roof skin in good condition, and the terminals of the vapor retarder are performed on the roof structure completely wind-tight and airtight.

Under building owners and developers for more information.

roof insulation

Flat roof insulation

Roof insulation: optimally insulated roofSource: Wikipedia; Author: Stuart Bull

There are different types of flat roofs. There are ventilated cold roofs, but these are come wide going out of fashion, and non-ventilated warm roofs, which are the most commonly performed type of construction by far. Flat roofs places high demands on the insulation materials, sealing and maintenance. Therefore a flat roof should be checked carefully before winter and after the last snowfall.

Flat roof insulation: Construction

In most cases, there is a flat roof from the inner plaster, the reinforced concrete ceiling, a vapor pressure equalizing layer and a vapor barrier, which together ensure that a water vapor diffusion into the insulation is prevented, and in not soak the insulation materials. Followed by a mineral fiber insulation, a gap insulation and the roof sealing with a balancing layer. Finally, the roof with gravel is weighted to reduce the heat load.

Flat roof renovation

When to renovate your flat roof?

  • In Schimmeplpilzbefall
  • For local moisture penetration
  • With a high energy loss
  • And at a high thermal load of the rooms in summer.

Cost flat roof insulation (renovation):

The renovation of a flat roof will cost between 100 and 200 euros per square meter.

Moss stop for the roof

Roof insulation: optimally insulated roof

Moss on the roof is annoying and extremely inconvenient to clean. There is a small copper strip which simply glued to the roof, which inhibits moss permanently on your roof. When it rains positively charged copper ions are released from the copper molecules and transferring rainwater. The rain water is spread over the roof surface and removes moss and lichen livelihoods. Moss-Stop is a special copper belt which imposes a long residence time by a special surface structure of the rain water, the rain water can absorb a particularly large number of copper ions.