Theoretical Analysis and Comparison of the Thermal Performance, Construction Costs, and Maintenance Complexity between a Conventional and an Intensive Green Roof

Table 9

Maintenance plan for the intensive green roof layers and their service life prediction (SLP) (the table is structured by authors upon data from [20] and authors own assessment).

Layer	SLP (years)	Maintenance action			Frequency
		Visual	Monitoring	Preventive	After planting	Maturation	Maintenance
Vegetation	—
Check of vegetation health		x			4/month	2/month	2/month
Check of state of cleanliness		x			2/month	2/month	2/month
Pest control				x	When necessary
Infesting/dry vegetation removal				x	6/year	6/year	12/year
Debris collection				x	1-2/year	1–2/year	1-2/year
Watering				x	1–3/day	1/day (summer)	1/day (summer)
Control of shrubs anchors				x	1/year	1/year	1/year
Fertilization				x	4/year	2/year	2/year
Pruning, reaping				x	—	1/year	1/year
Replacement of erosion protection				x	—	When necessary
Seeding or replanting				x	When necessary	1/year
Substrate	-
Check of settlements, shrinkage, saturation		x			1-2/year	1–2/year	1-2/year
Substrate adding/levelling				x	—	When necessary
Scarifying/soil aerating				x	—	1/year	2/year
Drainage, accumulation	10–35
In situ campaigns and local pools to assess wet areas			x		Every 5 years
Local repairs				x	When necessary
Deep inspection, scheduling of the next one. Eventual replacement or major repair				x	After 10 years
Replacement or major repair				x	After 35 years
Waterproofing membrane and root protection	30–40
In exposed areas, check of detachments, loss of adherence, rips		x			2/year	2/year	2/year
In exposed areas, check of moisture or biological colonization		x			2/year	2/year	2/year
In situ campaigns to assess watertightness			x		Every 5 years
Local repairs				x	When necessary
Deep inspection, scheduling of the next one				x	After 10 years
Replacement or major repair				x	After 40 years
Thermal insulation	35
In situ campaigns to assess heat fluxes and temperature values			x		Every 5 years
Local repairs				x	When necessary
Deep inspection, scheduling of the next one				x	After 10 years
Replacement or major repair				x	After 35 years
Load bearing structure	40–60
Check of excessive deformation, cracks		x			1/year
Check of blistering, moisture stains, infiltrations		x			2/year
In situ campaigns to assess structural stability and serviceability			x		When necessary
Local repairs				x	When necessary
Deep inspection, scheduling of the next one. Eventual replacement or major repair				x	After 40 years
Replacement or major repair				x	After 60 years