Browse Forums Building Standards; Getting It Right! Re: Gaps in bricks around Windows/doors new build. 12Sep 15, 2016 3:30 pm any news? How did it all go? The gap around the window to the frame should be 20mm. A&L make windows to brick opening sizes. You should not need infills. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 |