Lath Flashcards
What is the tolerance for level and plumb on weep screed, casing, and J-metal?
No tolerance
What is to be done on the outside corners of all weep screed?
Mitered and clipped to match the corner aid.
What type of weep screed is installed at all shear walls?
FHA #9
What type of weep is installed at non-shear wall locations?
FHA #7
What size casing is installed at gable vents?
And what is the Stucco Tradepartner to do around the entire perimeter of the gable vent?
3/8” casing
Caulk the perimeter
What size of casing is installed at garage return walls?
3/8” casing
What size casing is installed at all exterior doors?
1 3/8” casing
What should be done with the header piece of casing when installing it on exterior doors?
The header piece is to extend 1” past both legs
Who installs batt insulation behind all non-accessible (tub/shower/fireplace) locations?
Who provides the insulation?
The lath Tradepartner installs the batts.
The Shea field manager provides the insulation to the lather.
What type of vapor barrier does the lather install?
60 minute grade “D” vapor barrier
How many layers of vapor barrier are installed over OSB?
2 layers
What is the minimum head lap for the vapor barrier?
6”
What is the minimum end lap on the vapor barrier?
12”
At windows, the first two rows of vapor barrier (from the bottom) are to be installed how?
Behind the window moist stop
What is to be installed on top of all parapet walls?
And how far should it wrap down all sides?
Bituthane.
Wrap a minimum of 4”
What is to be installed at all recessed windows and ledges 6” or deeper?
And how far up and down the sides should it wrap?
Bituthane.
It should wrap up and down all sides a minimum of 4”
At all recessed windows and ledge locations the moist stop, bituthane, and grade D vapor barrier should be installed how?
Tightly into the corners
What gauge and size wire should the lather use?
1” - 20 gauge wire
What type of foam board should the lather use?
1.5 lb. tongue and groove foam
How should the foam be installed?
- Tightly utilizing the interlocking tongue and groove.
- Horizontally, with the sheets staggered at the joints.
Foam should be installed tightly to widow frames and eave blocks with a maximum gap of _______ ?
1/4”
At all mopboard locations the foam is to terminate where?
It is to terminate directly on top of the Z-bar metal.
What should be done to all the joints in the foam board?
They are to be taped, caulked or covered per the local municipality guidelines.
What does the lather install at all attic areas?
1” R-tech foam (or Star-R Guard). Standard foam is not acceptable at these locations.
How is R-tech or Star-R Guard installed?
All joints are to have solid backing, all non-tongue and groove seams and gaps that exceed 1/4” (including gaps at barge blocks) are to be sealed with R-tech or Star-R Guard tape.
Lath wire is to have a minimum _____ inch head lap.
And a minimum _____ inch end lap.
3”
6”
All lath wire is to be stapled off every ____ inches at the perimeter and ____ inches in the field.
6”
6”.
Lath staples should not be set deeper than _____ below the surface of the foam.
3/8”
There should be no lath staples closer than ____ inches to the edge of the window frame.
2”
Lath nails/staples are to have a minimum ____ inch penetration into solid wood.
3/4”
Is OSB or plywood considered solid lath backing?
NO. Solid backing is 2X material only.
What is an expanded metal butterfly?
A minimum 4” X 4” diamond mesh metal.
Where does the lather install expanded metal butterflies?
At the top corners of all doors, and at all corners of window openings.
Is a metal butterfly required if a window gets popouts?
No
What is the tolerance for plumb, level and square for popouts?
No tolerance
What does the lather install on all outside edges?
Corner aid
What do soffits 12” or wider receive?
Diamond mesh metal on the entire horizontal surface
What does the lather install at all stone locations?
Minimum 18 gauge diamond mesh metal
After the completion of the lath, what is the lather required to do at all “recessed” windows?
They are required to water test all “recessed” windows.
How should corner aid be secured?
It should be secured every 18” OC on both sides.
The lather is to caulk all gaps and penetrations in the foam and vapor barrier (inside and out) with what?
An approved polyurethane caulking
What is the lather required to do on the inside of the weep screed?
Caulk the weep screed to the bottom plate with an approved caulking.
What is the lather required to do at all nails/staples that miss the backing?
Remove or clip them, and caulk the penetration in the vapor barrier with an approved polyurethane caulking.
What is the lather required to do with any torn, or damaged vapor barrier?
Repair it and seal it with an approved polyurethane caulking (no painters caulk).
What is the final inspection the lather is required to do upon completion of a job? And what should they do if they find any items?
They are to inspect all electrical wires, plumbing lines and Freon lines for staple penetrations. If a water line is hit, the water is to be turned off.
They are to mark the location on the floor and then notify the Shea field manager.
Why is the weep screed at shear walls a different size?
So the weep can plane out evenly with the weep at non-shear walls.
How far should all corner aid be held out and why?
3/8” from the lath to allow consolidation of the stucco behind the metal.
