Polymeric foam and scrim sheathings

A method of using a sheathing in a building, the method comprising:

• (a) providing a sheathing comprising at least two layers, the first layer comprises a polymeric foam layer, a second layer comprising a polymeric scrim, the polymeric scrim including a first portion and a second portion, the second portion being located near the periphery of the polymeric scrim layer, the first portion having a first machine direction (MD) scrim count number and a first transverse direction (TD) scrim count number, the second portion having a second MD scrim count number and a second TD scrim count number, at least one of the second MD scrim count number and the second TD scrim count number being greater than the respective first MD scrim count number or the first TD scrim count number;
• (b) providing at least one wall supporting structure;
• and
• (c) installing the sheathing to at least one of the wall supporting structures.

A sheathing adapted to be fastened to at least one wall supporting structure, comprising at least three layers:

• (a) a first layer comprising a polymeric foam layer;
• (b) a second layer comprising a polymeric cross-woven scrim, the polymeric scrim including a first portion and a second portion, the second portion being located near the periphery of the polymeric scrim layer, the first portion having a first machine direction (MD) scrim count number and a first transverse direction (TD) scrim count number, the second portion having a second MD scrim count number and a second TD scrim count number, at least one of the second MD scrim count number and the second TD scrim count number being greater than the respective first MD scrim count number or the first TD scrim count number;
• and
• (d) a third layer comprising an impact polystyrene, the third layer being located between the first and the second layers.