Exterior Cladding, Windows & Doors Installation Flashcards

When flashing a flanged window in a house-wrapped wall, what is the correct order for applying flashing tape?

Answer: Sill, jambs, then head

Flashing goes on bottom-to-top (sill, jambs, head) so each upper layer laps over the lower one, shingle style.

How tight should vinyl siding nails be driven?

Answer: Leaving about 1/32 in. (a dime's thickness) between the nail head and the panel

Vinyl must be able to slide as it expands and contracts, so the nail head stops about 1/32 in. short of the hem.

What is the maximum horizontal nail spacing for standard horizontal vinyl siding panels per the Vinyl Siding Institute?

Answer: 16 in. on center

VSI guidance calls for fasteners no more than 16 in. apart, typically at each stud.

What minimum clearance between fiber cement lap siding and finished grade do most manufacturers, such as James Hardie, require?

Answer: 6 in.

Fiber cement installation instructions typically require at least 6 in. of clearance to grade to limit moisture wicking.

When shimming a prehung exterior door, where should the shims on the hinge jamb go?

Answer: Directly behind each hinge

Shimming behind each hinge gives solid backing where the door's weight is carried, which prevents sag.

What does a drip cap installed over a window's head trim mainly do?

Answer: Sends water out past the face of the head trim and window

Drip cap (head flashing) carries water running down the wall out beyond the trim so it can't get behind it.

What is the main benefit of installing siding over a rainscreen (furring strips or a drainage mat)?

Answer: It creates a drainage and ventilation gap so water can drain out and the wall can dry

The gap behind the cladding breaks capillary contact, letting water drain out and air dry the assembly.