It Is Always a Good Time to Weed…Your Roof!

Never let weeds and debris building up on your roof. RRCL was recently on a conventional roof with a built-up roofing membrane and saw all these weeds! It was akin to a small forest! When weeds take root in your membrane cover (in this case it was loose crushed stone) they will shoot roots down towards your roof membrane. As the weeds grow, so do the roots! This increases the potential for damage to your roof membrane. If you need some advice on your roofing, RRCL has over 20 years of expertise in roof design and replacement.

Why is Your Brick Spalling?

Unfortunately, someone installed an impermeable coating on the lower six courses of this solid brick masonry exterior wall. As you can see, the coating inhibits drying through capillary transport and forces the majority of moisture transport to be through vapour diffusion just below the surface; this leads to salt deposits below the brick surface (subfluorescence) and spalling. The uncoated masonry above is not experiencing this phenomenon.

Contact RRCL for all your enclosure design questions; we have expertise in existing or new construction enclosure design and forensics.

Keep Your Enclosure Design Simple…

While we do not know the story behind this project, there are three different water resistive barriers (WRB’s) in this picture. RRCL strives to support Architects and Designers to maintain simplicity in their enclosure design. Multiple products can lead to compatibility issues, varying performance (diffusion, air tightness transitions, durability, etc.) and general confusion on site.

Contact RRCL to support your enclosure design. While we suggest RRCL joins the project during pre-design, we have the capability to on-board at any stage in your project.

It Is Not Leaking, BUT….

RRCL was recently reviewing a conventional two-ply mod-bit roof and observed all these blisters! Happy that Property Management are not reporting leaks, however, this is not what you want to see on your roof. Why do YOU think this is happening? Contact RRCL if you want to know the likely answer…!

Shading Matters!

Are you designing a new building? Are you striving for passive house certification? The implications of shading, whether from surrounding buildings or surrounding natural elements, really matters!

Contact RRCL to conduct whole building energy performance simulation and we can show you how shading integrates with energy use, comfort, etc. And yes … we can certify to the PHIUS+ passive house standard.


How Tight are Passive House MURB’s?

This building…one fan (well, less than one fan, actually!) Are you surprised? We were NOT! We’ve tested several large Passive House buildings such as this one and are planning many more. Contact RRCL for all your big building airtightness needs – leaky or tight – we have the capability to execute a successful test.

Understanding and Maintaining Your Ventilation Device is Key to Making it Last

Last month we took apart two Ultimate Air RecoupAerator 200DX whole house ERV units that required specific maintenance; one a new motor, the other new bearings. When taking these apart, we were reminded how elegant a design the units were. We were also reminded how dirty they get after 5+ years of use! In case you are wondering, yes, we successfully repaired both units and they have been running smoothly.

RRCL has expertise in mechanical ventilating devices – balancing, commissioning and maintenance. Contact for more information.

A roof with a view…

We were recently assessing the building envelope of an office building in downtown Ottawa. As we climbed up the roof ladder and surveyed our surroundings (our normal procedure when going on roofs), I noticed this special view.

Contact RRCL to conduct building envelope and roofing assessments. Whether you need long-term repair and maintenance forecasting, or an immediate water penetration investigation, RRCL is an industry leader in enclosure performance and forensics.