Areas to receive material should be clean, fully enclosed and weather tight with the permanent HVAC in operation. A minimum temperature 68º F (20º C) should be established at least seven days prior to beginning the installation, maintained during the installation, and for at least seven days following the installation. The installation should not begin until the work of all other trades has been completed, especially overhead trades. Any areas to receive material should be adequately lighted to allow for proper inspection of the substrate, installation, seaming and for final inspection.
The installation of a floor starts with the subfloor, which must be sound, smooth, flat, clean, and permanently dry. In order to ensure that the moisture condition of concrete substrates is within acceptable limits, it is critical that moisture testing be conducted on ALL concrete substrates, regardless of age or grade level, including those where resilient flooring has already been installed. Moisture testing should not be conducted unless a stable, conditioned environment as described under the Jobsite Conditions section has been established. The 3 moisture testes that Forbo recommends conducting are as follows: a Calcium Chloride (Moisture Vapor Emission) Test, a Relative Humidity Test, and a pH Test. Performing adhesive bond testing is also highly recommended. Bond testing will aid in identifying both the working characteristics of the adhesive (open time and working time) for the site conditions, and also any potential bonding problems.
Material Storage and Handling
Areas where materials are to be stored should be a stable, conditioned environment as described under the Jobsite Conditions section. All materials and adhesives should be acclimated to these conditions for at least 48 hours prior to the installation. Material should be delivered to the job site in original, unopened packaging, with all labels intact. You will want to store Forbo tile products in cartons stacked and lying flat.
Be sure to only use material from the same batch/dye lot. Mix tiles from several different boxes within the same batch/dye lot. Do not remove more tiles from the box than can be installed in approximately 1 hour. Install the 10”x10” and 20”x20” tiles in alternating directions (quarter turned). The 10”x20” tiles do not have to be quarter turned.
A perfectly installed floor requires perfect adhesion. Forbo offers 3 high quality adhesives for Marmoleum tile installations: T 940, Sustain 885m, & Sustain 1195. The flooring material must always be placed into wet adhesive and rolled immediately with a 100 pound roller. Check for adhesive transfer frequently. There must be a wet transfer of adhesive to the material backing in order to achieve a secure bond. Always carefully read and follow the instructions on the adhesive label regarding the use and application of the adhesive, and always review and follow safety and health warnings included on the label and MSDS. After installation, make sure that the room is ventilated, in order to allow the adhesive to dry. Heavy foot traffic and rolling loads are not recommended over a freshly installed floor, until the adhesive has set thoroughly, which in normal conditions takes about 72 hours.