Green Roof Minimum Pitch

Roof slope of 1 4 per foot minimum is required on all roof systems.

Green roof minimum pitch.

For roof lengths greater than 6 metres an anti slip system may be required sublect to individual project assessment. An extensive green roof can reduce sound from outside by 40 decibels while an intensive green roof can reduce sound by 46 50 decibels peck et al. The best angle for greenhouse glazing in the roof is not as clear cut as some solar greenhouse designers make it sound. Varied substrate depths and vegetation forms possible.

Green roofs can increase a building s marketability. Generally speaking vegetation blankets can be applied on surfaces with a pitch up to 45. What is the maximum pitch possible for a green roof with vegetation blankets. Generally suitable for inverted roofs if applicable.

It is the task of the designer to make adjustments in the green roof system accordingly e g. To find the best angle for a greenhouse roof take your latitude and add 20 degrees. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. However you can only use this pitch with built up roofing or specialized synthetic roofing.

Drainage thickness of growing media plant varieties etc. Sempergreen has developed various systems which differ in structure in keeping with the pitch of the roof. Experience the total owens corning roofing system and high quality roofing shingles. Sloped roofs retain less water in general and the moisture content varies from the ridge to the eave lowest edge of the roof.

Green roofs have excellent noise attenuation especially for low frequency sounds. Slope should be built into the structure on new buildings. Secondary roof drains are to be positioned on the roof so that water will drains to the primary upslope and they should not be installed at the same elevation as the primary. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 20 0 for slate roofs.

Permanent solution for pitched green roofs without a specialised anti slip system. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. We can even help you find a professional to install it.