Installation Guides

Stretch in installation guidelines using smooth edge on concrete or timber subfloors.

Belaire underlays should always be installed in accordance to the Australian standards and current industry practices. Belaire underlays should always be laid on a clean dry flat surface. Any height variation should be considered, and rectified with the appropriate fillers or levelling compounds. Any subfloor imperfections will ultimately have an effect on pile surface after time.

Belaire underlays should always be fastened with staples or glue with all joins being covered with duct tape. Always lay the underlay with the paper or fabric side on top, allowing for the carpets to slide without rucking or grabbing when being stretched in.

Belaire underlays should also be laid at a 90 degree to the direction of the carpets when possible.

Belaire underlays always recommends that its underlays are laid in accordance with the current Australian installation practice’s guidelines , by professional installers using the correct grippers, glues, staples, tapes recommend from all quality flooring accessories outlets.

Belaire underlays provide the perfect fit for high end, heavy traffic areas such as commercial and industrial foot traffic installations.

All aspects of installation and sub-floor preparation should be in accordance with the latest version of AS/NZS 2455.1:2007 for installation of textile floorcoverings. The installer should be familiar with the standards and fully understand the recommendations it makes.


  • Existing floorcoverings such as sheet vinyl, linoleum or any textile floorcovering should be removed and the sub-floor made good prior to commencing with the installation.
  • The sub-floor must be sound, level, dry and free from dust, grease or other contaminants.
  • A moisture indicator test should be performed on all new cement sub-floors with the installation only proceeding once the relative humidity of the floor has fallen below 75%.
  • A room temperature of at least 18°C and a sub-floor temperature of at least 10°C should be maintained for the duration of the installation. If underfloor heating is present, this should be switched off for 48 hours prior to, and 48 hours after, the installation.
  • Uneven surfaces should be smoothed with a suitable proprietary smoothing compound.
  • Non-absorbent sub-floors such as ceramic tiles, terrazzo and power-floated concrete slabs should be skimmed with a minimum 3 mm of a proprietary smoothing compound.
  • Very absorbent or dusty sub-floors should be primed(Stikatak STK 1100 flooring primer).
  • Wooden floors must be structurally sound, level, smooth, dry and clean. Wooden floors showing signs of warping, shrinkage, excessive unevenness or wear must be rectified before proceeding. Wax or varnish coatings may react adversely with adhesive and so any such treatment should be removed.
  • Parquet floors must be structurally sound, with any missing or damaged blocks replaced and loose blocks repaired. Again, any wax or glazing treatments must be removed.
  • Metal floors may have a coating of protective grease which should be completely removed. Galvanised steel floors should be primed.
  • Prepare the sub-floor as recommended in section 2.
  • Lay out the underlay on the sub-floor. The underlay should be laid “backing side up”. Ensure the seams in the underlay are closely butted and run at 90° to any carpet seams. Check the underlay joins are level and of the same height.
  • Cut the underlay so that it is approximately 50mm too long around the perimeter of the room. Roll back the lengths of underlay to expose the sub-floor.
  • Apply adhesive to the sub-floor using a roller or Trowel
  • Once the adhesive has touch dried to a tacky state, roll the underlay back onto the adhesive, ensuring all the seams are closely butted.
  • Repeat the procedure for the whole installation. Cut the underlay to approximately 6mm from the skirting board or wall to leave a gap for a ‘tuck finish’.
  • Unroll the carpet and manoeuvre into the correct position, cutting approximately to size.
  • Fold the carpet back on itself and apply Stikatak STK 300/400/900 adhesive using a 2mm x 6mm notched trowel.
  • Lay the carpet onto this and smooth out any fullness or air bubbles. Always glide from the centre of the room to the perimeter. Repeat this process for the remaining carpet.
  • If any seaming of the carpet is required it is important to seal any cut edges with a proprietary seam sealant prior to laying the two sections of carpet into wet adhesive. N.B. Heat seaming tape is not required in a double stick installation.
  • The tuck finish around the perimeter may be achieved by cutting the carpet slightly oversize and tucking this into the 6mm gap between the underlay and the wall.
  • When all cutting and seaming is complete, use the glider over the installation again to ensure a perfectly smooth surface and to maximise the bond strength between the carpet and the underlay.