Thanks for your reply Woody, that kind of echos what others have said. What are the heavy grading lintels actually for out of interest? I can't imagine a scenario for the use of them?
Thank you most merchants round here stock IG so perhaps il send them a email. That's the insane thing it was the BCO saying that'll probably do it'll be allright, no interest in calculations or anything....
Just wondering if anyone can help with lintel dimensions or how to correctly size them. There not massive spans I need one at 1800 long and another at 2200 for a set of 1500 patio doors and a 1900 window.
I've been adviced to use Catnic or IG the wall make up is 100-100-100 cavity. Both skins...