1 WARNING
1.1 Weather-tightness
Installation of the flashing kit supplied with in-roof mounting kits should only be
undertaken by trained, experienced roofing professionals.
It is the responsibility of the roofing professional to ensure the suitability of the flashing
supplied for the specific installation and roof type and to ensure the weather-tightness
of the installation.
A continuous vapour barrier MUST be installed beneath the collector array, extending
down to the guttering, to prevent moisture ingress to the building in the event of
leakage of the flashing.
No claim for consequential loss or damage arising as a result of a defect of the flashing
or its installation shall be accepted by the manufacturer.
2 INSTALLATION
2.1 General Requirements
Select a suitable position for the collector. Ensure the section of roof to which the collector is
being installed is capable of supporting its weight and any likely wind and snow loads.
The collector should face as close as practicably possible towards south and not be shaded
by surrounding buildings, trees or other sections of the building to which it is being installed.
The collector must be installed on a section of roof with a tilt of between 15°and 90°to the
horizontal. Table 1 shows the effect of the tilt and orientation of the collector on
performance.
Tilt of
collector
North-west North
30° Recommended 4.3% loss 15% loss 27% loss 32% loss
45° 1.8% loss 7.1% loss 20% loss 36% loss 40% loss
60° 7.8% loss 14% loss 28% loss 44% loss 53% loss
Data derived from SAP2009
Table 1: Loss of performance due to collector angle and orientation
In-roof kits are available for fitting the collector to both tiled and slate roofs:
•tiled in-roof installation (refer to Section 2.2)
•slate in-roof installation (refer to Section 2.3)
IMPORTANT
Fill, flush and leak test the system PRIOR to installing the flashing
around the collector.
