Inverted double dressing

Both layers of chippings are applied at a rate of spread to achieve 100%-105% shoulder-to-shoulder coverage as measured by CEN EN 12272-1 (2002). The surplus of chippings 

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Figure 15.23 Types of surface dressing, (a) Single surface dressing (b) racked-in surface dressing (c) double dressing (d) inverted double dressing and (e) sandwich dressing (example of pre-chippIng dressing). (Reproduced from CEN EN 12271, Surface dressing - Requirements, Brussels CEN, 2006. With permission [ CEN].)...

Finally, in inverted double dressing, the size of the first-layer chippings is usually 2.8/6.3 mm. 

In the case of inverted double dressing, the procedure is the same as for double surface dressing but the first layer of chippings consists of small-size aggregate. 

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