·          Cut the aluminum on both sides of CTI with a utility knife, then tear the fiber layer by pulling it apart.  CTI may also be cut with a fabric scissors.

·          Attach CTI to rafters with a standard staple gun, using 10 – 12 mm staples.

·          Seal the overlaps, if desired, using YSM-brand tape. Taping is recommended when two unsupported CTI layers meet.

Since CTI’s proprietary DustBlock™ technology eliminates dust build-up, it is recommended to ventilate the roof space. Ventilating under the space contributes significant temperature reduction under the roof.

Installing of CTI under the rafters in an existing roof

Alternative A  

This is the fastest installation method.  

Spread the CTI insulation perpendicular to the rafters.  Attach to the underside of the rafters using a staple gun.

2. It is recommended to have a 5 cm overlap between the two CTI sheets.  If using CTI without an added aluminum edge on one side, place the lower CTI sheet under the upper CTI sheet.  If using CTI with an added aluminum edge on one side, place the edges of the upper CTI sheet over the lower CTI to create an overlap.  

Alternative B

This is the best method when installing CTI in a roof to be finished with drywall or wood paneling.  Install CTI parallel to the rafters and affix it to the inner sides of the rafters.  

Make certain that the insulation is 10 cm wider than the distance between the rafters. Measure the required length, starting from the peak of the roof to the bottom.  Cut the desired length of CTI. Affix the edges of CTI to the inside of the rafters using a staple gun, making sure to leave the maximum air space between the roof and the CTI.  Staples should be inserted every 30 – 40 cm.  An optional fold can be made along the edge of the insulation under the staple.

Installation of CTI in a new roof, before placing roofing tiles or shingles

Spread CTI on top of and perpendicular to the rafters, before laying the roof.  Attach with a staple gun, starting from the low end of the roof. Overlap the CTI sections, starting by placing the lower layers under the higher layers.  If using CTI with aluminum edges, lay the higher layer over the lower layer.

  Recommendation:  CTI can be stretched taut, however installing it loosely creates a 4 – 8 cm “valley” between the rafters to increase the ventilation under the roof.  This “valley” should be of a uniform depth.

Installing CTI on a plaster or wood ceiling