Hi, Can anyone tell me what is the best material to use to fill the gap between the new UPVC door frame and the brickwork after fitment. There will only be approximately 2 - 5 mm gap each side. I would like to make as little mess as possible and be sure that it is well insulated. I have used expanding foam in the past on my windows but remember how messy this was. Is there anything out there on the market better?