Stucco News

Question and answers on Stucco and Plastering-- July, 2011

Furring metal lath
I'm preparing to do the exterior stucco on my home in the up coming months. In researching types of metal lath, I have decided to go with the "diamond" metal. I understand the furring concept on this type of lath, except for the flat diamond product. I have seen it stapled directly to the exterior, over building paper. Is there not a need to manually fur this material away from the wall?

self furring lath
   The easiest way to fur metal lath is buy self furring lath.  Here is self-furring diamond mesh lath.

The lath has dimples, or crimps, 1/4" deep, about 3" on center, to hold the metal lath away from the wall.This allows mortar to get behind the lath for good support and reinforcement.

I have made my own self furring lath before by beating
a bundle of flat lath with a hammer.It is far better to buy
lath already furred.

Failure to use self furring lath,or to fur flat lath, will lead
to a weak product than can fail.
California style stucco mesh has self furring crimps.

Note how rows of crimps are colored with red (or yellow) paint.

This makes the crimps easy to find for a good nailing pattern.

Ideally, you want to hit the center of the dimple with a nail,
but the manufacturers explain that isn't possible to hit
the center of the dimple every time.

The most important things that the lath is a little baggy for mortar to penetrate well behind the lath.
self furring stucco netting
furring nails
furring nails

Furring nails are made for flat lath. A washer is used to
position flat lath away from the wall for a good key. This
method seems real slow, but works. Using self furring lath allows shooting on the lath with a roofing nailer.
Old furring nails were made in the shape of a hook.
These were used on a 1930's house we re-stuccoed.

This was an excellent idea for welded wire lath.
For more about methods for furring lath, please click here.