Mohawk HCC58-11 Guía de instalación descargar pdf (Pagina 3)

INSTALLATIONINSTALLATION

STEP 1 - LAYOUT

• Measure and mark 3”

from the wall at two

spots near each end

of the room. Drive a

nail at each spot

Stretch string and tie

each end of the string

around the nails so the

nails become posts.

Use the string as your

flooring guide.

Subfloor (Beneath Felt)

String Guide 15# Felt Nail

¾”

Tongue of wood flooring facing

center of room

¾” space for expansion at

ends and against walls

String guide

and nails

Note: this dimension

should be 4” when installing 3-1/4” wide flooring.

When a room is greater than 20 ft. in width the direction of the

installation should start near the center and work out towards the walls,

placing a loose spline where the two grooves come together.

STEP 2- INSTALL FIRST ROW

 Using the string as a

straight edge, lay the

first row of flooring in

place with the tongue

facing the center or

the room. Leaving a

¾” gap at the wall,

pre-drill and face nail

using 10D nails.

Continue nailing the

entire length of the

room 6” to 8” apart.

• Leave a ¾” expansion gap at each end. Set nails and fill

holes with matching putty. Remove string and nails.

STEP 3 – INSTALL REMAINING ROWS

• Continue the laying process (using a mechanical fastener)

until the room is complete

Helpful Hint – Use flooring lengths that offset or stagger the end joints

at least 6” or more for a professional look.

• Carefully cut the last row to leave a ¾” expansion space (See

Figure 3)

• Replace trim moldings

INSTALLING ¾" SOLID HARDWOOD OVER CONCRETE

Solid Hardwood Flooring can be installed on Concrete Slabs (minimum

3,000 psi) that are on or above grade. The moisture content of the slab

should be tested with a Calcium Chloride Test and emit less than 3

pounds per 1000 square feet per 24 hours. Then the appropriate

subfloor (nailing surface) can be installed. There are several methods

by which this can be accomplished:

• ¾” or thicker Exterior Grade Plywood laid over a vapor

retarder of 6 mil poly or two layers of 15# felt and power

nailed into the concrete slab. The ends of the plywood

panels should be staggered ½ panel in alternating rows and

an expansion space of ½” should be left around the

perimeter of the room. An expansion gap of ⅛” must be left

between the panels. The flooring may then be nailed to the

plywood surface using 1½” fasteners.

• ¾” or thicker Exterior Grade Plywood may also be glued to

the vapor retarder that has been glued to the concrete floor.

The vapor retarder and plywood should be glued using

cutback adhesive or other approved adhesive, applied

according to the manufacturer’s directions. The plywood

panels should be cut down to 4’ X 4’ or 16” X8’ and the

panel joints should be staggered by 2’. Score the backs of

the panels 3/8” deep on a 12” grid, laying the scored side

into the adhesive observing a 1/8” gap between the panels

and a ½” space around the perimeter.

• As an alternative a floating plywood base can be installed.

In this method a 6 mil poly vapor retarder is laid on the floor

lapping the seams at least 6”. Loose lay 3/8” exterior grade

plywood panels on the floor, allowing 1/8” between panels

and ½” between the panels and walls or other vertical

surfaces and offsetting the ends by ½ panel. Lay a second

layer of plywood at 90º angles to the first layer allowing 1/8”

between the panels and ½” between the panels and walls or

other vertical surfaces and offsetting the ends ½ panel.

Staple the panels together with staples that have crowns at

least ¼” and that do not penetrate the bottom layer in a

pattern not exceeding 6” X 6”. Lay an additional vapor

retardant barrier over the plywood panels and begin

installation of the flooring.

• Flat, dry Screeds or 2” X 4” boards of Group 1 softwood in

random lengths from 18” to 48” may be used as a nailing

base. The boards must be preservative treated (suitable for

interior use) and dried to no more than 12% moisture. The

screeds should be adhered to the floor using suitable mastic

adhesive at 12” on center. A 6 mil poly vapor retarder is

draped over the screeds and the flooring is nailed directly to

the screeds, provided the flooring is less that 4” wide. For

flooring 4” wide and over a wood subfloor must be applied

over the screeds to provide adequate nailing surface. 5/8”

CDX plywood or ¾” OSB are recommended for this

application. In high moisture conditions such as coastal

areas an additional vapor retarder should be glued directly

to the slab before the screeds are installed in addition to the

vapor retarder over the screed.

COMPLETING THE JOB

• Countersink and fill all nail holes.

• Clean the floor with an approved Mohawk FloorCare

Essentials Hardwood & Laminate Cleaner.

• Reinstall all moldings and transition pieces, nailing into the

walls or sub-floor, not the flooring.

• Use felt tips on the bottom of all furniture.

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Mohawk HCC58-11 Guía de instalación Pagina 3

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