Technical FAQ

Most of the questions regarding installation of the SURETOUCH system are answered in the SURETOUCH Installation Guide. Here are answers to the most commonly-asked questions.

1. How does water drain out?

As in traditional masonry, water can infiltrate the joints. This is normal and to be expected. This water drains out through channels in the polystyrene, between the insulation and the masonry.

With time, the caulking around the openings also becomes less waterproof, and infiltration may occur. In this case, slots on the back of the polystyrene panels act as drainage channels. In both cases, the water in the channels drains out through the weep holes at the bottom of the wall.

2. What are the rationales explaining the R13.5 value for the SURETOUCH system?

A thermodynamic diagnosis and tests in laboratory showed that the insulating value of the SURETOUCH system, Rl3.5, comes from the integration of the various components which reduce the thermal bridges appreciably and maximizes the “R” value of the unit.

The principal elements of this thermal resistance are:
The approach has also the advantage of standardizing the temperatures close to the interior walls (where one generally finds convection with the interior air). The thickness of the insulation layer has a crucial importance since it covers the whole surface in contact with the wall. Finally, the structural support component (embedding the stones in the insulating envelope and the mortar) also offers an additional thermal resistance compared to a traditional wall.

3. What is the weight per square foot?

The system weighs 22 pounds per square foot, including the joints.

4. What is the thickness of the unit?

The masonry is 1 3/4 in. (45 mm) thick. The entire system (stones and polystyrene) has a thickness of 3 3/4 in. (95.25 mm).

5. How are the stones held to the wall?

Stainless steel anchors are attached to the wall studs. Initially, these hold the polystyrene panels in place. Later, when the masonry is pointed, these anchors are embedded in the mortar. Once the mortar has cured, these anchors hold the stone-mortar unit firmly to the structure.

6. Where are the anchors installed?

The anchors should be screwed to the studs every 2 ft2 (0,18 m2) on average. For more details, please see SURETOUCH Installation Guide.

7. How is the pointing done?

The joints consist of a mortar specially developed by SURETOUCH. This mortar is injected using an injection gun. The joints are finished after pointing.

8. What type of mortar is used with the Suretouch system?

The SURETOUCH system must be pointed using SURETOUCH mortar. This mortar has several characteristics that distinguish it from other mortars on the market:

9. How do I clean the residue?

If any mortar remains on the stones once the mortar has cured, use a gentle masonry cleaner and follow the manufacturer’s instructions. Do not use a pressure washer to remove residue.