Roberts R6300-4 Guía de instalación descargar pdf (Pagina 3)

CUSHION REQUIREMENTS

The cushion in a Double Bond installation is subjected to much more stress than a

conventional stretch-in cushion. It is stressed not only vertically but also laterally

because it is glued top and bottom. The density and integrity of the cushion must

be such that it can withstand the additional stress. Further, the top and bottom of

the cushion must be both practical and suitable for bonding with trowelable latex

based adhesives. Please consult the cushion manufacturer to ensure they approve

the use of their cushion for Double Bond installation.

ADDITIONAL INSTALLATION NOTES

Always ensure adequate ventilation during ﬂooring installation.

The trowel notches referenced in this manual are the minimum size normally

recommended. Surface conditions (roughness and porosity of substrate), type

of carpet/backing and cushion will ultimately determine the required trowel notch

size and coverage. Flooring manufacturer’s products differ in characteristics and

textures. Always check with the speciﬁc ﬂooring manufacturer’s recommendations

for their speciﬁc trowel requirements. Less porous substrates typically require a

smaller notched trowel and longer open time than porous substrates. Worn trowels

should be thrown away. Re-notching trowels should not be attempted. Coverages

will vary depending upon the type of carpet, cushion and porosity of the substrate.

Ensure 100% transfer of adhesive.

Note: Trowel notches listed in this manual are measured: Width of Notch x Depth of

Notch x Notch Distance Apart.

Lack of adhesion caused either by the use of an unspeciﬁed adhesive, the

wrong notched trowel, not allowing the adhesive to tack-up prior to laying-in the

carpet, or by exposing the carpet to premature trafﬁc, are the major causes of

failure in a Double Bond installation.

CUSHION-TO-FLOOR APPLICATION

1. Install the cushion in longest possible lengths, taking trafﬁc patterns into

consideration. Ensure cushion seams are at a right angle to carpet seams. If that is

not possible, lay the cushion so the seams will offset at least 6 in. from the carpet

seams. Butt the seams of the cushion. Note: Do not tape or staple cushion seams

for Double Bond installations.

2. Trowel the recommended adhesive to the subﬂoor (see appropriate section

below for a permanent installation or releasable installation.)

PERMANENT CUSHION-TO-SUBSTRATE

INSTALLATION

• For Standard Subﬂoors and Cushions:

Adhesive: Roberts 3095 Carpet Adhesive or

3300 Carpet & Felt-Back Vinyl Adhesive or

R3090 Carpet Adhesive

Proper Trowel Size: 1/16 x 1/16 x 1/16 in., square-notch

(

Roberts 10-810, 10-823, 10125)

Approx. Coverage: 170–190 sq. ft. per gallon

• For Porous Subﬂoors and Cushions:

Adhesive: Roberts 3095 Carpet Adhesive or

3300 Carpet & Felt-Back Vinyl Adhesive or

R3090 Carpet Adhesive

Proper Trowel Size: 3/32 x 3/32 x 3/32 in., ﬂat top V

(

Roberts 10-820, 10-833)

Approx. Coverage: 100–120 sq. ft. per gallon

RELEASABLE CUSHION-TO-SUBSTRATE

INSTALLATION

• For Standard Subﬂoors and Cushions:

Adhesive: Roberts R6300 or R6280 Pressure Sensitive Adhesive

Proper Trowel Size: 1/16 x 1/16 x 1/16 in., square-notch

(

Roberts 10-810, 10-823, 10125)

Approx. Coverage: 170–190 sq. ft. per gallon

• For Porous Subﬂoors and Cushions:

Adhesive: Roberts R6300 or R6280 Pressure Sensitive Adhesive

Proper Trowel Size: 3/32 x 3/32 x 3/32 in., ﬂat top V

(

Roberts 10-820, 10-833)

Approx. Coverage: 100–120 sq. ft. per gallon

3. Respecting the open time of the adhesive, lay the cushion into the adhesive.

4. Smooth out any bubbles in the cushion and press the pad into the adhesive

using a tray, broom or a cardboard tube.

5. Trim the cushion ﬂush to the wall.

CARPET-TO-CUSHION APPLICATION

All carpets should be dry laid at room temperatures between 65°F and 95°F and

acclimated for a minimum of 48 hours prior to installation.

1. Properly position the lengths of carpet, and then trim the seams. Refer to the

cushion and carpet manufacturer recommendations for proper seam sealing

and/or the use of seam tapes. If seam sealers are recommended by the carpet

manufacturer,

Roberts R5200 Carpet Seam Sealer or 8502 Carpet Latex or

8015 Universal Carpet Seam Sealer may be used to seal and protect the cut

carpet edges.

2. Fold the carpet back the same way as during a direct bond installation.

3. Trowel the recommended amount of adhesive onto the cushion (see carpet type

sections below). Do not spread adhesive underneath seaming tape. Respect the

open time of the adhesive. Note: Drying time will be extended during humid and

cold weather conditions and in areas of inadequate air circulation.

• For ActionBac

and Smooth Backed Carpets:

Adhesive: Roberts 3095 Carpet Adhesive or

3300 Carpet & Felt-Back Vinyl Adhesive or

R3090 Carpet Adhesive

Proper Trowel Size: 1/8 x 1/8 x 1/8 in., U-notch

Approx. Coverage: 65–75 sq. ft. per gallon

• For Woven and Other Heavily Textured Backings:

Adhesive: Roberts 3095 Carpet Adhesive or

3300 Carpet & Felt-Back Vinyl Adhesive or

R3090 Carpet Adhesive

Proper Trowel Size: 1/8 x 3/16 x 1/8 in., U-notch

Approx. Coverage: 35–55 sq. ft. per gallon

4. Lay the carpet into the adhesive after it becomes tacky, and complete the seam

by using a

Roberts Heat Bond Iron to melt the adhesive on the Double Bond heat

bond tape.

Important – The adhesive must begin to tack-up before the carpet is set in place. If

the adhesive is not allowed to tack-up, any weight or pressure applied to the carpet

will force the adhesive into the cushion or away from the pad and be absorbed by

the carpet’s backing. This action may produce the disappearing glue syndrome,

which results in a scarcity of adhesive at the critical points of contact of the carpet

and cushion. Bubbling of the carpet will result and the installation will ultimately fail.

5. Roll the carpet using a lightweight roller (

Roberts 10-935 35 lb. Roller).

CUSHION-TO-FLOOR APPLICATION

CARPET-TO-CUSHION APPLICATION

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