After the carpet has been dry laid and acclimated, use control lines every other pattern. Using a knee-kicker, align the patterns as close as possible to the control line. This allows you to visually know how you will need to move the carpet prior to spreading any adhesive. Open up half the first breadth and half the second breadth. Glue the area by using a 1/8” x 1/8” x 1/8” or 0.3 x 0.3 x 0.3cm U-notch trowel. Lay the breadths back in. Setup control lines and by using a power stretcher and/or mini stretcher, align the patterns to the control lines. You may have to use stay nails to hold in place until the adhesive sets up.
Seams should be sealed on the direct glue down using a solvent-base sealer. Apply a 1/8 bead of seam sealer to the base of the edge at the first seam. Roll the second seam into the first. This will seal both edges to keep from fraying or unraveling.
Before commencing the installation, always read the instructions supplied with the adhesive with respect to site conditions (temperature and humidity), the type of adhesive spreader required, the correct type of adhesive and the quantity to be used.
After the carpet has been dry laid and acclimated, use control lines every other pattern. Using a knee-kicker, align the patterns as close as possible to the control line. This allows you to visually know how you will need to move the carpet prior to spreading any adhesive. Open up half the first breadth and half the second breadth. Glue the area. Lay the breadths back in. Setup control lines by using a power stretcher and/or mini stretcher and align the patterns to the control lines. You may have to use stay nails to hold in place until the adhesive sets up. Carpet needs to be rolled with a roller, maximum weight 35 lbs or 16kg. There should be no heavy foot or rolling traffic on the carpet for a minimum of 24 hours.
It is required to use double stick seam tape to ensure seam stability.
The carpet should be installed so the pile direction is in the down-the-stair direction. This ensures the carpet will wear better because foot traffic is the same as pile direction. Never position seams across stair nosings unless installing protective nosings such as plastic or aluminum strips.
Many times referred to as Electronic Jacquard or E.J., the technology of woven-to-plan panels has changed the way borders, inserts and out fields are all woven together to fit the space. Qualified installers are able to take 2 rolls of carpet and seam them together with one seam as opposed to seaming together the insert, border, outfield and end caps like a puzzle.
The installation package includes:
- Rolls labeled
- Control sheet
- Seaming diagrams
- Production diagram of each roll
- Flooded prints
Dry-lay all panels to ensure they line up. Be sure to check columns, light fixtures, soffits, and wall dividers while you are dry laying the carpet to make sure these areas are aligned. This will give you the opportunity to make adjustments prior to spreading any adhesive. Do not glue any carpet if it does not match. If you have something that doesn’t match, stop the installation and call Desso’s Service Support immediately.
After installation: carpet protection
During construction works, carpet should be protected from heavy traffic and construction dust with a non-staining building material paper such as kraft paper or protective cardboard or special carpet sheeting like Easydek. It is essential that the adhesive on the carpet is dry before protection is applied. Ensure that a minimum of 24 hours – but preferably 48 hours – drying time is taken into account and always follow the instructions provided by the manufacturer of the glue. Placing protective sheeting on the carpet before the adhesive is dry can cause capture of moisture, with pile reversal and irreparable damage as a consequence.
Pile Reversal and Shading prevention
Desso has undertaken several preventive measurements within our production facility in order to minimize the potential pile-reversal problems to an absolute minimum. However, there is no 100% cure to eliminate the risk of shading, we have tried to do as much as possible on our end to minimize the risks but it can not be excluded.
Actions / Preventive measurements that can be taken to avoid the shading effect from appearing:
• One should avoid using uni-colored carpets. Carpets that consist out of one color only have a bigger risk of showing the shading effect. On the contrary, ‘busy’ designs are camouflaging possible shading effects a lot more;
• One should consider to use underlay. Underlay has deck-levelling characteristics (soft) compared to a (hard) concrete or steel sub-floor. The more levelled the sub-floor is, the better the carpet will look after installation. In general underlay is recommended by DESSO to extend the Product Life Cycle;
• One should install the carpets at the very end of the project, 1-1,5 months before the ship delivery. After covering the carpets there should be no more extensive traffic on top of the covering material in order to avoid the shapes of the covering materials to be marked in the carpet. This will damage the carpet due to the continuous pressure on top of the covering material when the ship is still heavily under construction. This might cause or accumulate the shading effect or other visual defects;
• One should install the covering materials a few days after the carpet installation has been completed in order to let the moist of the adhesive vaporize. For the exact drying time please consult the technical specification of the adhesive used. An important parameter that influences the dry-time of the adhesive is the relative humidity of the air. Please pay extra attention to this point as too much moist is harmful for carpet. When there are doubts about the dry-time please consult the adhesive manufacturer at all times. Additionally, one should use covering material that is able to ‘breathe’ in order to let the moist of the glue and the carpet vaporize instead of sealing the surface with a 100% closed foil and/or wooden panels.
DESSO cannot be held responsible for the use of (IMO certified) adhesive that has never been tested together with the DESSO IMO certified carpets. In case of doubts about the adhesive to be used please consult DESSO for advice. When there are doubts DESSO can perform the required tests on your expenses to determine if the adhesive would be suitable. This is of big importance as DESSO can only apply the standard product guarantee when all conditions meet the required criteria. It is not possible to assure that pile reversal / shading will not develop in any carpet.
- When using adhesive, never cut carpet that already has adhesive applied to the back. When trimmings are removed, adhesive will be removed as well from critical locations.
- When installing carpet using any of the methods described above, ensure that the pile is standing up straight and that no piles are pinched into the seam.