Green Roofs

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Green Roofs

Lytag® lightweight aggregate is ideal for green roofs

Lytag is up to 40% lighter than natural aggregate and highly absorbant.

IDEAL FOR GREEN ROOFS

Lytag® needs a lighter support structure

Weight

Lytag® lightweight aggregate is up to 40% lighter than natural aggregate concrete, making it ideal for green roofs, and for tray systems.

Advantages: Reduced dead load; lighter support structure required. 

Benefits: Greater flexibility in design. 

TWICE THE VOLUME PER TRUCK

Logistics

An articulated truck can carry 36m3 of Lytag® compared with 18m3 of natural aggregate. More volume per truck reduces vehicle trips, haulage costs and environmental impact. 

Advantages: Quicker delivery to site.

Benefits: Savings in time, unit and haulage costs; less environmental impact.

LONG TERM STABLE SYSTEM

Lytag®’s rounded shape gives it strength and stability

Strength & Stability

Lytag®’s rounded shape and strength means it will not compact or break up over time, unlike irregular shaped aggregate, which can compact and silt up.

Advantages: No clogging, degradation or impediments to drainage; no damage to plastic pipes, membranes or bags.

Benefits: Extended life of the system; reduced maintenance costs; higher performing green roof.

HARD, LIGHT AND EASIER TO HANDLE AND PLACE

Handling & Placing

Lytag® pellets are very hard, light and half the weight of natural aggregate.

Advantages: Easy and quick to put into position; no specialist equipment needed.

Benefits: Reduced injuries; time and cost savings.

ABSORBS ONE THIRD OF
ITS WEIGHT IN WATER

High Absorption

Rapid dispersion of water is improved by both high absorption and lack of compaction. Low compaction offers improved rates of hydraulic conductivity compared to natural aggregates.

Advantages: Drainage systems are vastly improved. 

Benefits: An efficient green roof system; lower maintenance and replacement costs.

Green roofs

Summary
 
Compared to normal weight aggregate, Lytag® lightweight aggregate in green roofs:
  • Is up to 40% lighter;
  • Will not compact or break up;
  • Gives rapid water dispertion (high absorption and lack of compaction);
  • Allows twice as much volume to be carried per truck;
  • Is easy and quick to place;
  • Enables less dead load and a lighter support structure;
  • Offers better drainage, extended life, less maintenance,
  • Greater flexibility in design and substantial cost savings.