Roof insulation

What is roof insulation?

• Roof insulation kit not only protect your roof from the cold outside but also from the internal heat loss through your roof. It is also important to emphasize that roof insulation protects not only from the cold, but also from the heat of the sun.
• Standard roof insulation kit is installed on top of the roof boards (it will increase ridge height).
• Roof insulation structure is slightly different for bitumen/EPDM and metal roofing.
• Available insulation thicknesses: 10cm, 15cm, 20cm.

Roof insulation installation

Step 1: Lay the vapor barrier membrane (3) over the roof boards (2). The membrane should overlap by approximately 10 cm.

Step 2: Place the wooden insulation beams (4) on the roof. Use long screws to attach them directly to the purlins. The wooden beams should be spaced no more than 60 cm apart, according to the width of the supplied insulation material.

Step 3: Insert the insulation material (5) between the insulation beams (4).

Step 4: Stretch the breathable membrane (6) over the beams. It should be placed in 1.5-meter-wide layers, overlapping by approximately 10–15 cm, as recommended in the breathable membrane specifications. Attach it using staples. It is recommended to use tape to secure the overlapping lines and the areas where staples were used.

Step 5: Attach wooden laths (7) on top of the roof insulation beams (4). These laths are required to secure the breathable membrane and create a proper ventilation air gap. It is important that the air gap beams are installed in the same direction as the insulation beams below. Use screws or nails.

Step 6: On top of the air gap beams (7), install OSB boards (8) if the roofing will be bitumen shingles or EPDM. If the roofing will be metal, install an additional horizontal layer of laths (8), spaced every 35–45 cm, instead of OSB boards.

Step 7: Install the chosen roofing (9) according to the instructions provided by the roofing manufacturer.

Roof structure thermal analysis

Downloads

10cm roof insulation assembly manual

Rockmin plus declaration of performance

100mm roof insulation thermal analysis
200mm roof insulation thermal analysis