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Saturday, August 25, 2012

Using large commercial windows in your next shower renovation

This will be a stunning shower and features a floor to ceiling window on the long wall.  The window is commercial grade and installed as one full wall in this shower.  Waterproofing it was a bit of a challenge but I'm sure my approach will hold tight for generations.

The window is waterproofed with a combination of products and the entire shower assembly was flood tested for 72+ hours and inspected by a Vancouver plumbing inspector.

My primary waterproofing membrane for this shower is the blue membrane from Noble Company.  I used this Noble Seal TS to tie into the Watts clamping drain .  I brought the Noble Seal TS up onto the window and fixed in position with Kerdi FIx.  This is outside the recommendations from Noble Company but I have privately tested Kerdi Fix and it's ability to bond to metals in the past - I have yet to run any testing with Noble Sealant 150.

Waterproofing a window in a shower
On the vertical portions of the window to wall tie in I again used Kerdi Fix and a little Kerdi to make a bond from the window to the backer board.  Once this assembly was cured I used liquid membrane from Mapei (Aqua Defence to tie it all together.

These windows are a tough challange on any job - getting it perfect can be a little troublesome.  Your best approach of course would be to contact your suppliers and ask for a detail drawing.  Waterproofing windows is not covered in either the TCNA or TTMAC Specification Guidelines.

Common sense is often needed.  The window was sanded and cleaned where I bonded to it.  The bond was later tested by me - I tried to pull it off later.  Once complete the shower pan was flood tested - 3 plus  days.

I'm not sure what else I could have done....

In the end you are looking for an approval from the city.

City of Vancouver Inspection Report

In Vancouver once a plumbing inspector has signed off on a shower's flood test you are given one of these.  Knowing that every shower is inspected in vancouver that has a permit it makes good sense to self inspect these showers being built with no city envolvment.  If you need any help with this give me a call at (604) 506 6792 or reach me by email info@byanydesign.com or sales@no-curb.com

At the start of the project we set in our curb and a cast iron clamping drain.  Below the clamping drain you will notice the red fire-blocking.  We skimmed out the face of the framing with Grani Rapid from Mapei.

Floor to ceiling window in shower


This seam the weakest joint in the assembly.  After a light sand and cleaning a generous dose of Kerdi Fix
sealed the lip where the window bottom was installed into its track. Later I used more Kerdi Fix to attach the vertical section of Noble Seal TS.

Attaching Kerdi to the window with Kerdi fix

Kerdi and Kerdi fix was installed prior to the boarders showing up.
These flaps are sealed to the windows framing and then later set down onto the backer board.

The Kerdi and Kerdi Fix was installed into the back side of the window trim on the right side.

In any unusual install it is best to chat with the manufactures of these products.  The work I do here in Vancouver challenges me all the time and not too many weeks go by where I do not contact Schluter Systems, Mapei, Laticrete or Noble Company for help or direction.  I have found that much of the advice that can be given follows suit with printed guidelines - when you need to go outside of these parameters that is when prior expeirenc and for me my "Mad Lab Testing" comes into play.

Seeing is believing and more so - testing is proof that a concept has merit or will work.  I have used Kerdi Fix on many different products and is still my favourite waterproofing material in difficult installs.   I do not think I would use anything else to tie into a window.

As we speak I'm playing with a new product from Noble Company that is a lower VOC version of their Noble Sealant 150.  I will expierement with this new Sku and see how it compares to Kerdi Fix and regular Noble Sealant 150.  I'll let you all know how it goes in do time....

JW