Frequently Asked Questions 

Q:  Is PermaLath recommended for use behind stone?
A:  PermaLath 1000 has been tested for use behind stone veneer
and exceeded the maximum stone veneer requirement of 15 lbs/sq.ft.
PermaLath 1000 can replace conventional metal lath for attaching veneer.

Q:  How far does PermaLath overlap at horizontal and vertical edges?
A:   3”

Q:  How long can PermaLath be exposed prior to applying manufactured stucco.
A:  60 days

Q:  Can you use PermaLath on a soffit, ceiling or over open framing?
A:  No.

Q. Can PermaLath and PermaLath 1000 be used on fire resistive rated construction?
A:  Both PermaLath and PermaLath 1000 have been tested in 1-hour fire resistive rated assemblies. See respective evaluation reports for the assemblies.

Q. Can Permalath 1000 be used with 3/8” stucco?
A.  No, only PermaLath should be used with 3/8” stucco.

Q. What type of weather resistive barrier should be used when using PermaLath 1000?
A. On framed construction, a minimum of one layer of No. 15 asphalt felt, complying with ASTM D226 or other approved equivalent. Over wood based sheathing, two layers of Grade D paper.

Other acceptable secondary moisture protection barriers include polymeric weather resistive barriers such as Tyvek® Stuccowrap® and acceptable equals that comply with and are recognized by applicable building code. Trowel/roller applied weather barriers can be used provided a subsequent layer of a polymeric weather resistive barrier such as Tyvek Stuccowrap or Grade D paper is applied over the trowel/roller applied weather barrier.