Q. We will need a new roof next year. We are plagued with large icicles, and ice builds up on the edges of the roof now and we have experienced leakâ€" age inside the house from them. Can you suggest ways for us to eliminate these problems? A. The way to Ice shield prevents leaks from icicle buildâ€"up e o 0 6 o 0 6 o 0o a 0 0 0 8 0 6 0 0o o 0. 06 0 a 0.0 0 o eliminate ice dams is to provide a cold roof. This can easiâ€" ly be done in new construction but isn‘t always easy to accomplish on existing houses unless a new roof is built over the existing with sleepâ€" ers (wood pieces applied over the old roof) and new sheathing to proâ€" vide an air space. Soffit and ridge rents provide venâ€" ilation. water shield on the bare sheathing at the eaves when you reâ€"roof. Chimney cricket of a cricket is to divert water that runs down a roof to both sides of a chimney instead of letting it hit the back of the chimâ€" ney. and â€" its bases should reach the sides of the chimâ€" ney. Pressureâ€"treated Q. l am a carâ€" penter often workâ€" ing with pressureâ€" treated lumber building decks, retaining walls, etc. I have heard that this type of wood should not be burned as the fumes are harmful, that the sawdust should not be breathed as it conâ€" tains noxious chemicals and that these chemicals can enter the body through the skin by simply handling the wood. What‘s the story? A. You should definitely not burn pressureâ€"treated wood and you should wear a dust mask when sawing it. To the best of my â€" knowledge, however, the chemicals are staâ€" ble in the wood and do not leach out. Handling the wood should not present a risk of absorption of the chemicals through the skin. If someâ€" one has different information, T‘d like to know it. Henri de Marne, a remodelâ€" ing contractor in Washing, D.C., for many years, is now a housing consultant _ and president of Henri de Marne Assoâ€" ciates Inc. Send questions to him in care of this newsâ€" paper. Those of general interest will be answered in this column.