I2 - LT #5 Flashcards
What type of sealant is used to seal a wooden jamb to concrete?
Acoustical sealant
What type of moulding is used at exterior openings when no rainscreen is used?
Brickmoulding
How is the exterior finished sealed at a door when using a rainscreen?
1) Trim must overlap the exterior finish by at least 2” to prevent wind-driven rain from entering the building envelope.
2) Exterior finish should be Caulked at the back of the jamb to help maintain the air barrier.
What type of caulking is used to seal the interior casing?
Latex caulking
What type of insulation is used to insulate around doors?
Expanding polyurethane insulation
When using rain screen, what is used to protect the wood frame?
Wrap the exterior of the opening with a peel & stick waterproof membrane
How is the air barrier made airtight at the inside of a door opening?
Seal the joint with acoustical sealant
How are the door frames braced when they are installed prior to the brickwork in masonry construction?
brace & support the door frame in such a way that it does not interfere with the installation of the masonry
What special precautions must be taken when installing a wooden frame without the door?
Head jamb level, side jambs, plumb & paralell
What is done to improve the fire resistance of steel jambs?
Fill with grout after installation
How are steel jambs attached to wood frame construction?
Fastening is done by screwing through the face of the metal frame
Why is a plywood strip used under the mounting brackets for the vertical track of a sectional overhead door?
The drywall finish would crush under the load of the brackets
What is used to allow the number of rotations of the torsion spring to be counted?
Mark the spring with a chalk line
Why is installing a sectional overhead door dangerous?
Torsion spring used with these doors is very strong.
The outside of an interior door is the side of the door that is closest to the exit of the building, true or false?
True
Exterior RO size?
Width + 2.5
Height + 3
Exterior Double door RO?
Width x 2 + 3”
Height + 3”
Astragal is typically what size?
.75 inches
Headjamb should be sized at:
Door widths plus 3/16th
Gap between door and jamb should be:
3/32”
On a wooden door jamb, where could you hide screws?
behind the hinges or weather stripping
Three shims:
Top, bottom, and one at the position of latch
fastening nails to casing:
20” OC
What is the main cause of heat loss?
Air movement through the building envelope
All wooden frames installed into concrete must be treated with
wood preservative
Side jambs in concrete are installed by
nailing into placed wooden blocks or concrete anchors
how do you join the jamb to the concrete?
backer rod and acoustical sealant
after the trim is installed on the door in concrete, you must seal the joints to the
jamb, drywall, and concrete
after the trim is installed on the door in concrete, you must seal the joints to the
jamb, drywall, and concrete
In wet climates, how do you seal a door frame?
Wrap the exterior of the opening with a peel-and-stick waterproof membrane. Overlap with two layers of 30-minute sheathing paper. Lap the paper in a shingle-like fashion. Install 1x2 from the 3/4 air space behind the exterior finish
