Up Periscope

No we are not building a replica of a submarine with a snorkel and periscope.. This is the ventilation for the kitchen hob and roof.. it is designed to go up inside the old chimney that used to be in the kitchen. one tube will come lower and go through the new false ceiling and be connected to the extractor fan that is to be mounted over the cooker. The other tube (the smaller one) will sit above the ceiling and ventilate the space above the ceiling

With the wood mounted over the chimney opening and the pipes secured in place with some duct tape the rest of the base of the chimney was filled with expanding foam to secure  it all in place and seal the chimney off, with just the two pipes going through.