Installation Guide

ManualsBrandsUnbranded ManualsAppearance Boards & Planks1 in. x 8 in. x 16 ft. Miratec Trim MDF Board

CUTTING:

Use a ﬁne-tooth hand saw or power saw with a combination blade. Cut into the exposed face of the

material. Carbide-tipped blades are recommended.

FASTENING REQUIREMENTS:

MiraTEC trim is a non-structural decorative trim product and should not be used where structural

lumber properties are required. MiraTEC trim is designed to be applied to structural framing, sheathing

and other materials.

* Note: Nail at least 1/2˝ from the edge. Do not nail into the edges of MiraTEC trim. For 4/4 and 5/4 fascia and sofﬁt

applications, MiraTEC trim can be fastened directly to the rafter ends, double nailed a minimum of 24˝ on center. For 5/8

fascia and sofﬁt applications, MiraTEC trim must have a sub-fascia and be nailed 16˝ on center to the rafter ends or sub-

fascia. For all other horizontal and vertical applications, double nail 16˝ on center, falling on the studs.

Fasten MiraTEC trim from DO NOT nail toward the

one end to the other end. center from both ends.

BUTT JOINTS:

All joints must fall over a framing member. MiraTEC trim can be mitered, scarfed, or beveled as required.

For runs less than 30 feet in length, butt joints should lightly touch. For runs over 30 feet in length, space all

butt and scarf joints 1/8˝ apart and apply sealant into the full depth of the 1/8˝ joint. Double nail all joints

on both sides as noted in the diagram.

When mitering for column wraps or corner boards, CMI recommends gluing the edges of the trim to

maintain a tight joint. Use a quality exterior grade yellow carpenters glue or high quality polyurethane

adhesive. Lightly ease the edge of the ﬁnished corner with 220 grit sand paper for best paint adhesion.

FASTENERS:

Always use fasteners appropriate to the style of construction where the trim is installed. Fasteners must be equal or

better in performance (such as nail withdrawal, bending strength and corrosion resistance) to 6d or 8d 15 gauge ﬁnish

nails or headed nails, long enough to penetrate 1 1/4˝ into structural wood studs or studs and structural sheathing

material. Use nails with corrosive resistance equivalent to hotdipped galvanized nails. For installations near oceans, large

bodies of water or in high humidity climates, CMI recommends using stainless steel fasteners on MiraTEC trim. For

these installations, do not use electro-galvanized fasteners, due to poor long term rust resistance.

Power or pneumatic nailing systems may be used. Visit www.miratectrim.com for information on air pressure settings

on a variety of pneumatic nailers. Tapered or bugle head fasteners are permitted when the heads are properly sealed

from moisture.

Nail heads, or any other dents, can be ﬁlled with exterior grade spackling putty speciﬁcally designed for ﬁlling nail holes.

Allow putty to dry, sand smooth with 100 grit sandpaper and spot prime before painting. Over time, spackling putty

may need to be replaced or touched up. For the best aesthetic appearance when using the smooth side of MiraTEC

trim, additional work is required. The nails should be set ﬂush or slightly countersunk (not to exceed 1/8˝ ). Then apply

the spackling putty as outlined above. Reapply the putty as needed for desired appearance.

Use a nail that is appropriate to the style of construction. Do not use staples, braids, or t-nails.

GENERAL INFORMATION: MiraTEC Treated Exterior Composite Trim is an

engineered wood composite trim designed for use in both exterior and interior applications

where a non-structural smooth or wood grain textured blemish-free trim product is desired.

MiraTEC trim resists moisture, rot and termites.

APPLICATION INSTRUCTIONS

Patented

16'' O.C.

Framing

1/2'' min

Continuous

horizontal

flashing with

drip & 2˝ (min.)

overlaps

& joints

Siding

Window or door

head casing, water

table or other

horizontal trim

Gap 1/8''

Seal Joint

Double nail on both sides of butt joint

CORRECT

INCORRECT

16'' max

16˝ O.C.

Fascia Application

Rafter

Fascia

24" max

Sub-fascia is

recommended

in regions of

high humidity

or extreme

humidity changes.

CONDITION

Snug

Flush

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CONDITION

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add nail

16'' O.C.

Framing

1/2'' min

Continuous

horizontal

flashing with

drip & 2˝ (min.)

overlaps

& joints

Siding

Window or door

head casing, water

table or other

horizontal trim

Gap 1/8''

Seal Joint

Double nail on both sides of butt joint

CORRECT

INCORRECT

16'' max

16˝ O.C.

Fascia Application

Rafter

Fascia

24" max

Sub-fascia is

recommended

in regions of

high humidity

or extreme

humidity changes.

16'' O.C.

Framing

1/2'' min

Continuous

horizontal

flashing with

drip & 2˝ (min.)

overlaps

& joints

Siding

Window or door

head casing, water

table or other

horizontal trim

Gap 1/8''

Seal Joint

Double nail on both sides of butt joint

CORRECT

INCORRECT

16'' max

16˝ O.C.

Fascia Application

Rafter

Fascia

24" max

Sub-fascia is

recommended

in regions of

high humidity

or extreme

humidity changes.

16'' O.C.

Framing

1/2'' min

Continuous

horizontal

flashing with

drip & 2˝ (min.)

overlaps

& joints

Siding

Window or door

head casing, water

table or other

horizontal trim

Gap 1/8''

Seal Joint

Double nail on both sides of butt joint

CORRECT

INCORRECT

16'' max

16˝ O.C.

Fascia Application

Rafter

Fascia

24" max

Sub-fascia is

recommended

in regions of

high humidity

or extreme

humidity changes.

16'' O.C.

Framing

1/2'' min

Continuous

horizontal

flashing with

drip & 2˝ (min.)

overlaps

& joints

Siding

Window or door

head casing, water

table or other

horizontal trim

Gap 1/8''

Seal Joint

Double nail on both sides of butt joint

CORRECT

INCORRECT

16'' max

16˝ O.C.

Fascia Application

Rafter

Fascia

24" max

Sub-fascia is

recommended

in regions of

high humidity

or extreme

humidity changes.

Glue

Mitered

Edges

Rafters

Fascia

16"

max

MiraTEC 5/8˝

fascia requires

sub-fascia in

regions of

high humidity

or coastal areas.

5/8˝ Fascia Application

Summary of content (4 pages)

PAGE 1
APPLICATION INSTRUCTIONS GENERAL INFORMATION: Rafter MiraTEC Treated Exterior Composite Trim is an engineered Rafter wood composite trim designed for use in both exterior and interior applications 16'' O.C. where a non-structural smooth or wood grain textured blemish-free trim product is desired. Sub-fascia is recommended MiraTEC trim resists moisture, rot and termites. 16'' O.C. Patented Sub-fascia is recommended in regions of high humidity or extreme humidity changes. CUTTING: 16'' O.C.
PAGE 2
FLASHING AND MOISTURE CONTROL: The structure on which MiraTEC trim is applied should be well ventilated and dry. Do not apply MiraTEC trim over wet sheathing, or any closer than 6˝ to finished grade or final landscaping. As with all wood products, MiraTEC trim shouldnot come in direct contact with masonry or concrete. At foundations or exterior brick veneer, the product should be separated from the masonry by metal flashing, polyethylene film, 30 lb. felt or a 1/4˝ to 1/2˝ air space using masonry standoffs.
PAGE 3
GENERAL INFORMATION: Paint performance is dependent upon the quality and quantity of paint applied, and the conditions under which it is applied. Low quality paint and/or thinly applied paint tends to last for a relatively short time, resulting in discoloration, premature fading, inadequate substrate protection, and frequent repainting - sometimes as often as every one or two years. Top quality paint, applied in sufficient quantity, will provide the best performance with minimum maintenance.
PAGE 4
Patented MACHINING: MiraTEC trim can be grooved or machined to produce a variety of decorative applications. The machined profile should not compromise the physical integrity of the board or induce cracking or splitting of the product. Routed or grooved MiraTEC trim should not have any flat surfaces where water can accumulate. Maintain an angle of at least 100 degrees from the vertical to provide positive drainage and to prevent moisture from standing on the surface.