Insulation above the roof structure
POSSIBLE SYSTEMS:
Insulation installed parallel to the purlins
Insulation installed diagonally to the purlins
Insulation installed over the roof structure
Under fibre cement
Under metal plates
Insulation installed parallel to the purlins
1. EUROTHANE
2. Steel structure
3. Wood purlin
4. Rigid inner wall
5. Batten strip
6. Cross batten
7. Vapour-tight tape
8. Waterproof elastic coating
9. Outer coating
Note
Purlin distance according to the useful width of the insulation boards. Width of the insulation plates according to the board thickness and type of frame: 1150 mm - maximum 1200 mm.
Edge finishing: see below.
Insulation installed diagonally to the purlins
1. EUROTHANE
2. Steel structure
3. Wood purlin
4. Rigid inner wall
5. Batten strip
6. Cross batten
7. Vapour-tight tape
8. Waterproof elastic coating
9. Outer coating
Note
Width of the insulation plates according to the board thickness and type of frame: minimum 1150 mm - maximum 1200 mm.
Edge finishing: see below.
Insulation installed over the roof structure
The insulation is preferably done with one board length, from the roof ridge to the gutter.
If this distance is too important, ensure the end joint is level with an underlying purlin and finished at the top end with the same tape (see detail).
1. Waterproof, stretch tape
2. EUROTHANE
3. Purlin
4. Chair profile
This construction assumes the use of corrugated fibre cement boards.
Please refer to the manufacturer’s instructions for placing corrugated plates.
For buildings with interior climate class IV or a building with overpressure, extra attention must be given to the finishing of the seams.
In the exceptional cases in which condensation moisture cannot be avoided, the draining of the condensation moisture can be considered via the corrugated plates, subject to taking the required joint sealing of the roof into account.
1. Corrugated plate
2. Waterproof, stretch tape
3. EUROTHANE
4. Type "W" edge sealing
5. Chair profile
6. Purlin
Any dripping condensation moisture is drained via the insulation board.
The type “W” edge finishing, in combination with the associated chair profile and sealed at the top with a watertight, stretchable tape provides a continuous insulation barrier.
This construction gives extra security with the use of metal roof plates.
Please refer to the manufacturer’s instructions for the position of metal plates.
Taking the phenomenon of ‘undercooling’ of the steel plates into account, the chance of condensation is greater than with corrugated plates. Consequently it is necessary to pay extra attention to draining the condensation water.
If the metal plates are laid directly on the insulation boards, the contact area would be too big and the heat load would be too much.
The construction described takes these points for attention into account.
The type “W” edge finishing, in combination with the associated chair profile and sealed at the top with a watertight, stretchable tape provides a continuous insulation barrier.
1. Metal plate
2. Cross batten 55 x 70 mm
3. Batten strip 22 x 68 mm
4. Waterproof, stretch tape
5. EUROTHANE
6. Type "W" edge sealing
7. Chair profile
8. Purlin
A wooden tile batten is attached on top of this tape from the roof ridge to the gutter that provides extra clamping and also enables the draining of condensation water.
Perpendicular to these battens, cross battens are mounted that serve as holders for the metal roof plates. Due to this trellis, any direct thermal contact with the insulation is avoided.
Due to its closed character a roof structure with metal plates is more sensitive to wind loads. The dimensions of the trellis and the screws must therefore also be studied thoroughly.