MEGAPAN ROOF

The MEGAPAN ROOF is a watertight, anti-rot, vapour permeable and fully environmentally friendly roof board. It is pigmented green.

Composition:

A close, homogenous mixture of magnesium and selected mineral deposits strengthened with alkali resistant glass fibre. This specially developed, environmentally friendly roof board scores on all technical demands: bend resistance, resistance to rupture, water absorption, density, hygroscopic expansion etc……exceedingly well.

Measurements and weight:

Thickness	3 mm
Length	2500 mm
Width	1200 mm
Weight	ca 2.7 kg/m²
Voluminous mass	900 kg/m³

Packaging:

150 boards per pack

Properties:

Fire-resistance	A1   EN 13501 – 1  /  klasse 1  BS – 476 1
Bend-resistance	> 16 Mpa
Impact-resistance	> 3.6 KJ/m²
Water absorption	< 18 %
Easy to install and nail down
Contains no single harmful substance what so ever

Installation:

Megapan roof boards are always nailed onto a timber structure with the smooth side upwards. The boards are placed diagonally onto the joists or rafters (along the horizontal side). The distance between supports, measured from centre to centre, mounts up to maximum 600mm. Positioning starts from the top or the bottom of the roof.

In case of not sideways overlapping, the sideways joints must fall just above a beam or a rafter. The height of the batten amounts to a minimum of 15mm and a maximum of 26mm. If the boards do need to overlap along the sideways joint (in case of too small joists or rafters), a thinner batten needs to be fixed on that joint.  In the direction of the slope, the boards overlap each other with a minimum of 30mm (vertical wall of 90º) to maximum 115mm (in case of a 15º roof slope).

Table             roof slope             overlap

90°	30 mm
70°	32 mm
50°	39 mm
45°	42 mm
40°	47 mm
35°	52 mm
30°	60 mm
25°	70 mm
20°	88 mm
15°	115 mm

To overcome the difference in thickness at the height of the horizontal overlap, the batten are either locally interrupted or thinned. Another option is to let the batten run through provided that the megapan boards are worked into the rafter by means of an indentation.

(See drawings)

 

 

 

 

1. tile lath

2. batten

3. MEGAPAN ROOF

4. joist

 

1. roof  tile

2. tile lath

3 .batten

4. (potential) sealing tape

5. joist

6. MEGAPAN ROOF

7. insulation

8. airtight damp screen

9. pipe cavity

10. interior finish

 

1. roof tile

2. tile lath

3 .batten

4. (potential) sealing tape

5. MEGAPAN ROOF

6. joist

7. insulation

8.airtight damp screen

9. pipe cavity

10. interior finish

 

 

 

1. roof tile

2. tile lath

3 .batten

4. MEGAPAN ROOF

5. insulation

6. airtight damp screen

7. pipe cavity

8. interior finish

The Megapan roof board has not been designed to be an exterior board; therefore it is advised to fit the roof covering as soon as possible after installing the megapan roof boards.