Guest User
4/12/2005
We have received bids on putting a standing seam roof on a shed roof over our sunroom. This sunroom was an addition that butts up to the original house, and whose original roof is perpendicular to the main house. One contractor has said that he would not be able to guarantee that the roof would not leak. This is because there are 2 windows that are just above the proposed metal roof that provide no area into which he could put 4-6" of flashing. He is the only contractor to have mentioned this. I do not want to mess with the 2 windows, but would like a metal roof that affords me a guarantee against leaking. Is there any way around this? Or is this contractor just being too cautious?
Todd Miller
Classic Products, Inc.
4/12/2005
This is a tough area where I have seen things go awry before. I think that the contractor who made this warning knows his stuff to at least some degree and is trying to be honest with you. I am assuming that there is enough room beneath the window to flash onto a lower profile roof, such as shingles? One option would be to make a very very wide flashing -- perhaps even 18" or so, down to the roof panels so you would have flat metal at the top of this roof section for 18" or so. The only other options would be to drop the roof level or raise the windows.
Guest User
4/12/2005
The windows are right above the roof--the sill sits right above the roof line. Since the windows can't be moved up or downsized, does this mean I can't put in a leak free metal roof?
Allan Reid
Dura-Loc Roofing Systems, Inc.
4/13/2005
You do not mention where you are located and why your existing roof failed. I am assuming it has an existing shingle roof and a vaulted ceiling. The new building codes call for ventilation and your situation makes this more difficult. Your drawing indicates that you have a reasonable pitch of 3/12 which is good. I would suggest removing the existing roof, install a good metal drip edge at the eave and then cover the roof with a good quality ice and water shield and turn it up the wall as far as possible. Removing the existing roof material will provide you with a little extra room. Then there is a thin (1/4") mesh undelayment that is used in installing cedar shingles over solid sheathing. I would install this which will keep the metal up off the deck and allow any condensation to weap down and out over the underlay and drip edge. Finally then I woould choose a low profile screw down panel such as a 5V crimp biut try to get it in a good paint finish and in lighter colours to keep the heat out. Stop the sheets a little short of the wall and allow for a wall flashing with a longer lower leg to transfer out and down over the metal and use a profiled vented closure strip between the flashing and roof covering. Assuming this was an addition and the flashing not cut in and under the siding, have the flashing formed with a 1/2" tip out at the top called a gum edge which once fastened to the wall can be filled with a high qualty butyl based 2 part caulking to seal.
Guest User
4/13/2005
I live in southern NH. We are removing the 7 skylights that are in the sunroom roof now, and framing in the whole roof. The room under did have a vaulted ceiling. We are removing the roof because, to avoid ice dams in the winter, my husband has to go out on this roof and shovel it off. Not a fun chore. We never had leaking at the point where the roof meets the main house. Only at the roof edge (and once or twice over the past 16 years, we've had problems with the skylights themselves). Will what you suggest provide us with a watertight roof?
Allan Reid
Dura-Loc Roofing Systems, Inc.
4/18/2005
There are two types of roofing systems "Hydro Static" and "Hydro Kinetic". Most residential roofing systems are Hydro Kinetic which means it relys on the movement of the water or in simpler terms a slope. You could install a Hydro Kinetic roof system which is completely watertight and will hold a certain amount of water however you are in convention of the building code. I stand by my previous recommendation which is a good alternative to the code requirements given your site conditions.
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