Frequently Asked Questions

Yes, we provide free consultancy services regarding the Skyrise Greenery systems available in the market and suitable plant selection. We also provide advice on certain issues in pre- and post-installation matters based on experiences gathered from other completed projects of similar nature.

It depends on your choice of plants, hardy and drought-tolerant plant species are more likely to survive prolonged periods of drought.

The average weight of green roof system ranges from 50-150 kg/m2. It is advisable to consult a certified Professional Engineer on the load bearing capacity of the roof structure, regardless of whether you are working with a new or existing building.

An irrigation system is generally required for most green wall systems and intensive roof gardens to ensure the healthy growth of plants.

Extensive green roofs may be designed to be self-sustaining without irrigation through the use of integrated water reservoirs in the drainage layer and the selection of drought tolerant plants. However, green roofs with integrated irrigation are not uncommon. If you are considering installing irrigation for your skyrise greenery, sub-surface drip-irrigation system is the preferred choice as it optimizes the use of water by directly dampening the substrate.

The lifespan of a green roof is about 20 years. It can last longer when well maintained. The conventional exposed roofs need maintenance every five to ten years.

Correct installation of a green roof will not have any adverse effect on the waterproofing. The additional layers of a green roof can protect the roofing membrane from UV rays, extreme temperature fluctuations and puncture. The reduced stress can double the serviceable life of the waterproofing.

Maintenance costs will vary depending on the nature, scale and design of the project. You can work with your contractor to design a solution to fit within your budget. To minimise cost, consider a sustainable green roof where plants are allowed to flourish together as nature intends. Such naturalistic landscape design requires less maintenance and is a great choice to achieve biodiversity, and an environmentally friendly rooftop greenery.

A list of skyrise greenery contractors can be found here. For a full list of landscape companies on the Landscape Company Register, please refer to this website. ↗ (opens in new tab) Please note that the inclusion of a company on either list should not be construed as an endorsement, recommendation, nor guarantee by NParks of the quality, suitability, or performance of any products or services offered by the company.

Please let us know by clicking here to fill up a query form. ↗ (opens in new tab)

Thank you for your interest, please head over to our How to Apply page to learn more! Once you are ready, please fill up the SGIS interest form ↗ (opens in new tab) and we will get back to you.

No, maintenance costs will not be fundable.

No, please feel free to clarify with us by filling up the query form here ↗ (opens in new tab).

SGIS aims to promote the implementation of sustainably designed and well-maintained rooftop and vertical greenery that can contribute towards Singapore’s climate, ecological and social resilience. The five years undertaking period is to ensure the sustainability of the project.

Existing buildings that are occupied at the time of application or undergoing Additions & Alterations (A&A) works may be eligible for SGIS. Please refer to this page for more details on eligibility.

The cash incentive covers up to 50% of the Skyrise Greenery installation costs or a maximum of $200 per metre square for rooftop greenery and a maximum of $500 per metre square for vertical greenery, whichever is lower.

Yes, your proposed skyrise greenery project will be assessed for SGIS based on the project’s merits. NParks will provide the necessary advice on your proposal if required. Upon approval of your application, you will receive a letter of offer from NParks, following which, installation works may begin.