Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




3242 posts

Uber Geek


#268003 22-Feb-2020 20:50
Send private message

Can a double glazed door with standard clear glass on the outside and laminated annealed glass on the inside be cut to put a cat door in, or does the glazing unit need to be replaced?

Thanks




 Home:                                                           Work:
Home Work


Create new topic
6535 posts

Uber Geek

Trusted
Lifetime subscriber

  #2425604 22-Feb-2020 21:10
Send private message

I did a Google search and got this


In general, heat treated or tempered glass is four times stronger than annealed glass. Tempered glass cannot be drilled or cut without shattering. All fabrication needs to be done while the glass is in the softer, annealed condition. Annealed glass can be cut, drilled, notched and edge finished.




3242 posts

Uber Geek


  #2425607 22-Feb-2020 21:24
Send private message

Thanks. I know that a single pane can be, I just wasn’t sure about a double glazed unit. I had read that it is best to score it from each side, which would surely be trickier with a double glazed unit?

 
 
 
 


2572 posts

Uber Geek


  #2425608 22-Feb-2020 21:36
Send private message

It's incredibly difficult to accurately cut a double-glazed unit, and nearly all installers will recommend simply replacing that panel with a single glazed piece, or having a new factory-cut piece made (more $$$).


1116 posts

Uber Geek


  #2425720 23-Feb-2020 00:03
Send private message

Paul1977: Can a double glazed door with standard clear glass on the outside and laminated annealed glass on the inside be cut to put a cat door in, or does the glazing unit need to be replaced?

Thanks

 

For a few years the building code has required safety glass in doors (I think it used to be optional if there was a vision rail). What that means is the non laminated glass pane would be toughened, and toughened glass is difficult to cut without disintegrating. 

 

Toughened glass should have an S safety logo mark so look for that in a corner. 

 

Cutting laminated standard glass should be possible but making a shape cutout in situ without making a mess? You'd have to ask a professional. Maybe one of those non transparent cat doors would hide any cosmetic defects. 

 

Perhaps they could smash out the outer pane. Even if they can retain the outer pane it will lose airtightness and suffer internal condensation unless they have very specific processes applied to supersede that problem. In the UK repairing IGUs is a thing but not so much in New Zealand.

 

Low e glass is usually on or inside the outter pane so it may look inconsistent if you've got low e elsewhere.

 

Replacing the IGU with a factory cat door, if possible, is more ideal.  

 

This is why I'd say pre-emtively install a cat door in double glazing even if you don't have a cat.




3242 posts

Uber Geek


  #2425750 23-Feb-2020 09:11
Send private message

bfginger:

Paul1977: Can a double glazed door with standard clear glass on the outside and laminated annealed glass on the inside be cut to put a cat door in, or does the glazing unit need to be replaced?

Thanks


For a few years the building code has required safety glass in doors (I think it used to be optional if there was a vision rail). What that means is the non laminated glass pane would be toughened, and toughened glass is difficult to cut without disintegrating. 


Toughened glass should have an S safety logo mark so look for that in a corner. 


Cutting laminated standard glass should be possible but making a shape cutout in situ without making a mess? You'd have to ask a professional. Maybe one of those non transparent cat doors would hide any cosmetic defects. 


Perhaps they could smash out the outer pane. Even if they can retain the outer pane it will lose airtightness and suffer internal condensation unless they have very specific processes applied to supersede that problem. In the UK repairing IGUs is a thing but not so much in New Zealand.


Low e glass is usually on or inside the outter pane so it may look inconsistent if you've got low e elsewhere.


Replacing the IGU with a factory cat door, if possible, is more ideal.  


This is why I'd say pre-emtively install a cat door in double glazing even if you don't have a cat.



Thanks @bfginger we are installing one in our new build, but may be staying with family for a while so looking at whether it’s worth the expense of putting a cat door in their place.

It’s not low e or argon filled, but is laminated annealed on interior, and I had assumed standard clear on exterior - but now I’m not so sure after your comment above, I’ll have to check. It is an over height door with no vision rail, so probably $$$$ to replace the whole IGU.

Sounds like he might have to be an indoor cat for a while!

1116 posts

Uber Geek


  #2426068 23-Feb-2020 23:38
Send private message

You could get one of those infrared chimes so there's a "ding dong" whenever the cat approaches the outside of the door. 


Create new topic





Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Chorus completes the build and commissioning of two new core Ethernet switches
Posted 8-Jul-2020 09:48


National Institute for Health Innovation develops treatment app for gambling
Posted 6-Jul-2020 16:25


Nokia 2.3 to be available in New Zealand
Posted 6-Jul-2020 12:30


Menulog change colours as parent company merges with Dutch food delivery service
Posted 2-Jul-2020 07:53


Techweek2020 goes digital to make it easier for Kiwis to connect and learn
Posted 2-Jul-2020 07:48


Catalyst Cloud launches new Solutions Hub to support their kiwi Partners and Customers
Posted 2-Jul-2020 07:44


Microsoft to help New Zealand job seekers acquire new digital skills needed for the COVID-19 economy
Posted 2-Jul-2020 07:41


Hewlett Packard Enterprise introduces new HPE GreenLake cloud services
Posted 24-Jun-2020 08:07


New cloud data protection services from Hewlett Packard Enterprise
Posted 24-Jun-2020 07:58


Hewlett Packard Enterprise unveils HPE Ezmeral, new software portfolio and brand
Posted 24-Jun-2020 07:10


Apple reveals new developer technologies to foster the next generation of apps
Posted 23-Jun-2020 15:30


Poly introduces solutions for Microsoft Teams Rooms
Posted 23-Jun-2020 15:14


Lenovo launches new ThinkPad P Series mobile workstations
Posted 23-Jun-2020 09:17


Lenovo brings Linux certification to ThinkPad and ThinkStation Workstation portfolio
Posted 23-Jun-2020 08:56


Apple introduces new features for iPhone iOS14 and iPadOS 14
Posted 23-Jun-2020 08:28



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.