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Preformed / Site formed DPC's

paul1982a · 2017-11-26 00:05:37

Hi everyone, could someone please explain to me the difference in the above and when either would be used? i.e. what is the advantage of using a preformed cavity tray as opposed to dpc roll cut to suit in particular for the heads of windows? I understand cavity trays used at abutments with roof / wall but what is the rule…

26-11-2017 12:05am

#1

paul1982a

Registered Users, Registered Users 2 Posts: 16 ✭

Join Date: March 2013

Posts: 8

Hi everyone, could someone please explain to me the difference in the above and when either would be used? i.e. what is the advantage of using a preformed cavity tray as opposed to dpc roll cut to suit in particular for the heads of windows? I understand cavity trays used at abutments with roof / wall but what is the rule at windows... if anyone could give any advice much appreciated!

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Comments

#2 26-11-2017 8:33am

BryanF

Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭

Join Date: October 2010

Posts: 9850

What’s there to explain. One is made off site, one is cut/ folded on site. The question is the saving worth it, that depends on how much you trust your builder, yourself and your arch

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