Ecological insulation, innovative construction - roofs with the STEICO construction system

Pitched roof with the STEICO construction system

The roof has always been the domain of STEICO wood fibre insulation materials. Because virtually every roof construction is also a timber construction per se. Wood fibre insulation materials have exactly the same material characteristics as the load bearing timber structure. In this way, construction and insulation complement each other. 

In a new building, the combination of flexible and stable wood fibre insulation boards is an ideal choice. Sheathing boards are stable wood fibre insulation boards which, in addition to their insulating performance, provide additional rain and weather protection. The boards are "hydrophobic", i.e. water-repellent. Rain therefore simply rolls off them. This wood fibre insulation is laid above the rafters and protects the roof from moisture, wind and dust from the moment it is laid. Combined with a flexible wood fibre insulation layer between the rafters, U-values up to Passivhaus-standard can be achieved.

"Rain protection and moisture management  –
like functional clothing for the home."

STEICO sarking boards are installed above the rafters. There they supplement the cavity insulation and minimise thermal bridges. They can be temporarily exposed to the weather and are rainproof. In this way, they protect the building during the construction phase and permanently form a second protection layer under the roof covering. At the same time, they are open to diffusion and allow moisture to escape.

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λD 0.036 – best insulation performance with natural insulation materials. The so-called lambda value (λ) is important for cold protection. The lower the value, the better the insulating performance of a material. With a declaration value of λD 0.036, STEICOflex 036 has the best insulation performance of all natural insulation materials.

This means effective thermal insulation, low heating costs and a comfortable feeling of well-being.

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Roof construction "STEICOjoist"

Thermal bridge-optimised roof construction with STEICO I-joists

  1. 12.5 mm plasterboard.
  2. STEICOmulti membra 5 vapour control layer.
  3. STEICOjoist from 160 mm to 400 mm
  4. Ecological STEICO cavity insulation, e.g. STEICOflex insulation batts or STEICOzellair injected insulation offers excellent protection against cold in winter combined with maximum heat protection in summer.
  5. STEICOspecial dry sarking board 60mm. Offers excellent insulation, protects against rain, hail, wind and dust and is water vapour diffusion open at the same time.
  6. Counter batten to provide external ventilation layer / batten and roof finish.

Roof construction "Solid Timber"

Standard roof construction with solid timber rafters

  1. 12.5 mm plasterboard
  2. Service void, insulated with STEICOflex 40mm
  3. STEICOmulti membra 5 vapour control layer.
  4. Solid timber rafter.
  5. Ecological STEICO cavity insulation, e.g. STEICOflex insulation batts or STEICOzell air injected insulation offers excellent protection against cold in winter combined with maximum heat protection in summer
  6. STEICOspecial dry sheathing board 60mm. Offers excellent insulation, protects against rain, hail, wind and dust and is water vapour diffusion open at the same time.
  7. Counter batten to provide external ventilation layer / batten and roof finish.

Roof construction "Flat"

STEICO solution for flat roofs

  1. 12.5 mm plasterboard
  2. Service void, insulated with STEICOflex 40mm
  3. STEICOmulti membra 5 vapour control layer.
  4. STEICOjoist from 160 mm to 400 mm.
  5. Ecological STEICO cavity insulation, e.g. STEICOflex insulation batts or STEICOzell air injected insulation offers excellent protection against cold in winter combined with maximum heat protection in summer.
  6. STEICOspecial dry sheathing board 60mm. Offers excellent insulation, protects against rain, hail, wind and dust and is water vapour diffusion open at the same time.
  7. STEICOmulti UDB diffusion open breather membrane.
  8. 80 mm ventilated airspace battens @ 600mm centres, covered with 18 mm OSB / plywood.
  9. EPDM
  10. Final roof covering.

Installation of sheathing boards

Laminated Veneer Lumber (LVL)

STEICO LVL (Laminated Veneer Lumber) is one of the most resilient wood-based materials available. Whether in modern timber construction or for industrial applications: STEICO LVL impresses with its strength, resilience and dimensional stability.

STEICO LVL consists of several layers of approx. 3 mm thick softwood veneer glued together. This creates an almost homogeneous product with the highest strengths - much more resilient than naturally grown wood.

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I-joists

The concept of the I-joists is simple: High load-bearing capacity - less material. Two LVL flanges are joined by a specially developed hardboard. This creates a very load-bearing joist that is significantly slimmer than a solid beam. Slimmer load-bearing structures in the roof and walls offer more space for insulation materials and thus increase energy efficiency with the same component thickness.

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Wood-fibre insulation materials

STEICO manufactures an extensive range of wood fibre insulating materials from fresh coniferous wood - from façade insulation and flexible cavity insulation to sarking boards. Wood fibre insulating materials not only protect against cold in winter, but also against heat in summer. They offer safety from wind and rain and, due to their diffusion openness, a high level of moisture protection.

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Air injected insulation

STEICO air injected insulation is made from natural wood fibres. STEICO air-injected insulation is convincing in terms of quality, cost-effectiveness and outstanding insulating properties. Permanent settlement resistance and simple processing are the distinguishing features of these insulating materials.

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STEICOmulti sealing system for the building shell

A tight building shell is an essential prerequisite for energy efficiency and functionality. The STEICOmulti sealing system is the comprehensive complete system for air and vapour sealing as well as weather protection. With the accessories such as adhesives and sealants, the connection of the membrane range to each other and to bordering building components succeeds safely and reliably.

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STEICO News

News

The advantages of timber: construction method

Does timber offer a construction method that provides tangible benefits to make it a system of choice for the construction sector?

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The advantages of timber in construction: health and wellbeing

This article from the Beyond Zero Carbon team looks into the health and wellbeing benefits that timber, and natural products generally, can offer when…

News

Nachhaltigkeit

The advantages of timber in construction: environment

A positive CO2 balance can only be achieved by harvesting trees, using their wood for material purposes and replanting young trees, which then…

News

STEICO I-joists: guidance for follow on trades

With STEICO I-joists services can be incorporated within the floor zone. The new guide provides follow-on trades with valuable advice on the correct…