BEFORE THE ARCHITECT – HOME DESIGNING BACKGROUND – UNIQUE HOME DESIGNING ARTICLES
TRIM DETAIL AND CLAD DETAIL
By Before The Architect Copyright 2004-2010
To commemorate a brief time last year on nearby John Burruss Road when my granddaughter and I could easily have been put upon by severest violence and suffering: "He shall cover thee with his feathers, and under his wings shalt thou trust; his truth shall be thy shield and buckler." Psalm 91:4. That is what happened. AG
INTRODUCTION
Comment: The main text of this article is lifted from a home plan set that
Before The Architect did some time ago. This text is intended as instructive
and suggestive; different home, different text.
·
A small part of this article
is about clad detail referring to and extending code
· Most of this article is about home finishing trim detail and clad detail sorted out during years at the granite knee of life experience
o Rushing doesn't suit these home building jobs either
o
Collectively, this litany is
unique
FINISHING HOME TRIM
DETAIL AND CLAD DETAIL
·
Polyvinyl chloride (a/k/a PVC)
trim material shall be considered in lieu of wood, particularly for exterior
casings and flatwork
· A handrail sized and spaced to code
o Shall be applied to a stair with 1 or more risers, except where entry from grade to interior is a single step
o
Which handrail shall be fastened
securely to structure, solid-blocked if needed
· Wallboard of not less than 5/8 linear inch Type-X or equivalent
o Shall conform to not less than most recent ASTM C36 (a/k/a American Society for Testing and Materials, “Standard Specification for Gypsum Wallboard") 5/8 linear inch Type-X
o Shall be applied
§ Interior and exterior to stairwells
§ To abutting walls and ceilings
§ To the stair passageway
§ Including beneath treads and risers
§ Including stringers exposed below
§ Including ceiling and all walls of a closet below and abutting a stairway
§ Including storage space below a stairway
o Shall be applied interior to a garage where surfaces abut habitable space
o Shall be rated by most recent ASTM C36 (a/k/a American Society for Testing and Materials, “Standard Specification for Gypsum Wallboard") as not less than 5/8 linear inch Type-X or equivalent and
o Penetrations in such wallboard shall be sealed with fire-rated caulks and sealants
§ In not less than conformance to most recent E136 (a/k/a American Society for Testing and Materials, “Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 degrees C")
§
In not less than conformance to
most recent ASTM E814 (a/k/a American Society for Testing and Materials,
“Standard Test Method for Fire Tests of Through-Penetration Fire Stops")
· Wallboard
o Shall be applied and finished in strong [read: as on a sunny day] natural light or
o Shall be applied and finished in artificial illumination not less than 5 incandescent watts per square foot (i.e., approximately 40 lumens/ft.2) of contiguous surface area to be coated
o Shall be only floated at corners
o Shall receive not less than three coats of wallboard compound
o
Shall be sanded smooth between
each coat of wallboard compound
· Wallboard not less than 5/8 linear inch thick shall be applied to walls and ceilings
o In a garage and
o
In a manual or machine work
bench area, regardless of whatever other qualifications are required of that
wallboard, e.g., X-type, moisture-resistant, etc.
· Deck railings
o Shall be fastened to posts to withstand not less than 250# force in any direction by using either one of 2 ways, among others
§ The railing shall be lapped over the post and face-fastened with not less than 2–#8 screws or 2–10d nails
§ Balusters (a/k/a pickets, spindles) shall be face-fastened to the posts at their in-line faces and then
§ Rails shall be fastened perpendicular to baluster butts preferably
§ With not less than #8 screws
§ Not greater than 6 linear inches on center on the vertical and
§ Not less than 2 screws on the perpendicular
§
Interior railings shall
withstand not less than a 250# force in any direction
· Interior wood trim
o Shall be of
§ Same material and method throughout a house
§ Except for very modest variation, more likely in width and not decorative treatment, to distinguish a particular feature or element as a child’s alcove or formal space
§ Shall be, preferably, at casings, butt-jointed and not mitered
§ Shall be at baseboard
§ Pieced (not precut)
§ At corners
§ Inside, butted
§ Outside, mitered
§
Big as you can manage
Comment: While base cap
commonly is unremarkable and often too small for the subordinate baseboard, note
please there are plenty of wonderfully profiled base caps worth a look-see.
· Interior wood trim to be painted
o Shall be lightly coated twice with spray shellac to seal knots and other potential bleeders
o Shall be caulked at trim joints and
o
The caulked seams shall be
damp-wiped smooth and clean
· Exterior wood trim to be painted and before fastening
o Shall be lightly coated twice with spray shellac to seal knots and other potential bleeders
o Shall be prime-coated not less than once on all sides, including butts, miters, bores, notches, etc.
o
Shall be finish-coated not less
than once on all sides, including butts, miters, bores, notches, etc.
·
Plastic gutters, downspouts, and
leaders shall not be applied
·
PVC trim may be considered in
lieu of wood for exterior applications, particularly in re casings and flatwork
· Vertical finish faceboards to bay window shall be
o Not less than 4 linear inches wide
o
Shall be of a single board each
· Lintels
o Shall be sized correctly, as though applied without steel reinforcement
o Lintel height shall be not less than 1/6th of window or door width below
o
Ends shall overlap equally on
each side of window or door shall be equal either to the full height of the
lintel or half the height of the lintel
· Mouldings –
o Flutes shall preferentially be tapered and not stopped
o Dentils
§ Shall be oriented only perpendicularly
§
Shall be applied only to Ionic,
Doric, and Corinthian Orders
·
Columns of the Tuscan Order
shall not be fluted
· Classical Orders may
o Collocate
o Be artfully adapted
o Be applied as decorative and not necessarily structural or apparently structural
o Artfully associate Roman arch, vault, and column with Greek lintel and post, or trebeation
§
Without pedestal, but with an
entablature, and, specifically, at least a cornice
· Shutters
o Shall be in each width equal to half the width of the window (or door) with which the shutter is associated
o Shall be hinged so as to function fully
o Applied so as to function properly when closed
o
Shall be dogged simply (i.e.,
not S-dogs)
· A cedar-lined closet
o Shall be lined only with Eastern Red Cedar planking
o Shall be thoroughly sealed to air passage at all joints
o Shall be fitted with exterior grade, single-swing doors bearing full weather stripping and sweep
o
Shall NOT be relied upon as an
air source to abutting Mechanical Room or other air-use space
Comment: Note well that
unfiltered breathing of cedar dust, as from sanding, can be hazardous to
health.
· In a bathroom
o Especially a bathroom generally or commonly occupied by a lady
o Absolutely in a Master Bath if at all possible
o Absolutely in a Hers Bath if at all possible
o In addition to the standard wall mirror above the lav(s)
o Apply another mirror plane abutting the standard mirror and at right angle to it
o Which added mirror plane shall as well be sited most beneficially in the reflection of natural light into the bathroom
o
Noting that in alcove
applications, mirror may be added to abut each end of the standard mirror and at
right angles to it
· Interior doors
o Shall involve 3 hinges of not less than 3 ˝ linear inches
o
Except solid-core and better
shall involve 3 hinges of not less than 4 linear inches
·
Exterior doors shall involve 3
hinges of not less than 4 linear inches
· Wallboard fastened to ceiling
o Where the ceiling structure is of roof truss bottom chords and
o Especially in colder climes and
o Without regard as to whether the attic above is vented or unvented
o Shall be
o Fastened to the bottom chords to within 18 linear inches of space perimeters
o Not fastened to the bottom chords within 18 linear inches of space perimeters
o Supported at its perimeters by clips
o May require cornice trim to conceal ceiling creep evidenced at the perimeters by expanding and contracting joints between the seasons
. . . . . . .
About
Us
◊ jrp2h2000@yahoo.com ◊
770-889-6964 ◊
Site
Map• Privacy Policy
· · · · · · · (If this is your first visit to
Before The
Architect, please consider spending a few moments looking over the
Site
Map, in order to get a feel for the website design.
Before The Architect E-mail:
jrp2h2000@yahoo.com.)
