Hello All,
Recently had my foundation cored and installed my thimble and through wall chimney pipe. The thimble is through my concrete foundation and within the thimble I am using triple wall class A chimney pipe. The picture below highlights my question. There is a very small gap between the thimble and the concrete wall, as well as the triple wall pipe and thimble. What can i use to seal these up? Some sort of non combustible insulation, foam or sealant? I can feel a significant draft through these areas so im sure they arent intended to be left like this. What products do you recommend? Thanks!
Recently had my foundation cored and installed my thimble and through wall chimney pipe. The thimble is through my concrete foundation and within the thimble I am using triple wall class A chimney pipe. The picture below highlights my question. There is a very small gap between the thimble and the concrete wall, as well as the triple wall pipe and thimble. What can i use to seal these up? Some sort of non combustible insulation, foam or sealant? I can feel a significant draft through these areas so im sure they arent intended to be left like this. What products do you recommend? Thanks!
