If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)

Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

Window detail for Larsen truss EWI on existing house with existing windows

Calahonda52 · 2025-04-29 08:03:50

Just wondering how you avoid a thermal bridge with reduced insulation on reveals The LT could be 300 or 400 deep so could window be hung on the LT plywood lined ope

29-04-2025 09:03AM

#1

Calahonda52

Registered Users, Registered Users 2 Posts: 13,415 ✭✭✭✭

Join Date: January 2015

Posts: 12475

Just wondering how you avoid a thermal bridge with reduced insulation on reveals
The LT could be 300 or 400 deep so could window be hung on the LT plywood lined ope

“I can’t pay my staff or mortgage with instagram likes”.

0

Comments

#2 29-04-2025 11:53AM

10-10-20

Registered Users, Registered Users 2 Posts: 9,059 ✭✭✭

Join Date: March 2007

Posts: 8865

Along the depth of the ply specifically?

0
#3 29-04-2025 12:50PM

Calahonda52

Registered Users, Registered Users 2 Posts: 13,415 ✭✭✭✭

Join Date: January 2015

Posts: 12475

https://www.boards.ie/discussion/comment/123400368#Comment_123400368

Trying to figure it out.

“I can’t pay my staff or mortgage with instagram likes”.

0
#4 30-04-2025 05:23PM

encorton1

Registered Users, Registered Users 2 Posts: 9 ✭

Join Date: March 2023

Posts: 9

I would definitely separate the "Plywood boxes" somewhere at a truss and fill it in with impregnated PE foam tape. I would then reduce the size of the windows to allow for the same size impregnated PE foam tape installed on the perimeter of the window. I think this will likely reduce it, but you will need a condensation risk analysis calculation done to see if there is a chance of condensation / mold.

0