Will you require window accessibility for normal cleaning or air flow? If Of course, you’ll require an openable Alternative – This may be vertical or horizontal sliding or inward opening casement. A straightforward approach to seal these gaps is to fill them with an acoustic caulk, which include Eco-friendly Glue https://eyebrowtweezers50109.articlesblogger.com/61076704/acoustic-secondary-glazing-for-dummies