| Author |
Message |
mattc (Unregistered Guest)
Unregistered guest
| | Posted on Wednesday, May 06, 2015 - 11:08 pm: |    |
Glazing accessories such as setting blocks and edge blocks are offered in several different materials. Does anyone have an opinion or recommendation on the appropriate material? Or is it better to simply list several different materials and leave it up to the manufacturer to decide? I'm speaking in general terms ... |
Michael Chusid
Senior Member
Username: michael_chusid
Post Number: 29
Registered: 10-2003
| | Posted on Thursday, May 07, 2015 - 09:05 am: | |
There is an article about shims in 2011-March issue of Construction Specifer.
Michael Chusid, RA FCSI CCS
www.chusid.com www.buildingproduct.guru |
Brett Scarfino (Unregistered Guest)
Unregistered guest
| | Posted on Thursday, May 07, 2015 - 01:08 pm: | |
In general terms, there can be adverse reactions between the blocks/gaskets and the sealants used in the glazing system (mainly IGU edge seals and structural silicone). You might leave the materials open ended (as I commonly see), but be sure to include reviews/precon testing that would screen for adverse compatibility issues. |
Wayne Yancey
Senior Member
Username: wayne_yancey
Post Number: 740
Registered: 01-2008
| | Posted on Thursday, May 07, 2015 - 06:18 pm: | |
ASTM C864 - Standard Specification for Dense Elastomeric Compression Seal Gaskets, Setting Blocks, and Spacers.
ASTM C1115 - Standard Specification for Dense Elastomeric Silicone Rubber Gaskets and Accessories.
Setting Blocks: ASTM C864, neoprene or EPDM, or ASTM C1115, silicone; 80 to 90 Shore A durometer hardness.
Spacers: ASTM C864, neoprene or EPDM, or ASTM C1115, silicone; 50 to 60 Shore A durometer hardness. |
ken hercenberg
Senior Member
Username: khercenberg
Post Number: 899
Registered: 12-2006
| | Posted on Thursday, May 07, 2015 - 07:47 pm: | |
Depends on a lot of factors. Window, storefront or curtain wall? Desired longevity. Compatibility with sealants as already noted. General rule of thumb is that neoprene tends to break down fastest. EPDM seems to be more stable with better longevity for not much more money (better value in my opinion) followed closely by silicone compatible rubber followed by silicone (much more expensive and needs focus when designing your system. Silicone should theoretically last a very long time. Other consideration when talking gaskets is vulcanized vs. goop in place. |
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