Tuesday, March 19, 2013

what type of roofing material should i use to lay flag stone in the low slope porch?

Q. i want to install flag stone in my deck
right now the deck is with torch roofing material but i want to lay stone. please somebody recommend is there any material i can use so does not leak

A. There are two problems with this idea. First of all is the weight. Flagstones are heavy and this presents a dead load, (it is there all the time) that may stress the capacity of the roof. Any material of weight will add to the load.

The second issue to consider is that this kind of approach is also going to press into the torch down material. You won't necessarily notice when the edge of a flagstone when stepped on presses into the material.

Flagstones can also get very hot and on a roof where there is no heat sink below them they will probably get very very hot. There is a reason why boardwalks are made of wood.

For these reasons the best approach is usually to put down some kind of wood deck that doesn't sit directly on the roofing material and is easily removable for re-roofing. But I have also seen boardwalk like sections made to sit directly on the roof.

Flagstones are typically set in dirt, sand or concrete. All of these materials will tend to be hard on the roof and difficult when faced with re roofing.

Best roofing material for rain/snow protection?
Q. We live near Seattle. It rains a lot. It snows on occasion, not usually hard. Rarely, there are windstorms and we have lots of tall trees that like to drop their branches during such storms. Our roof has a pretty normal pitch.

What roofing material would last the longest, require the least maintenance, be easy to repair, and really be the best damn investment into a home we plan to be in for a long time? Any articles you recommend we read?

Thank you!

A. Best? That's really difficult to say. That kind of depends on your budget, among other things. You could go for standing seam stainless steel, or copper. That's probably the best in the long term, it's been known, in the case of copper, to last hundreds of years with no repairs, or very few.

The principle thing you will want to do, is get a good underlayment. The self stick rubberized material is a good choice here, be sure it's the self sealing kind, that will heal itself and seal around nails and things. You might look at slate, clay barrel tiles, or a newer cement product made to look like slate. All of these options will be expensive. Before you do any of it, make sure what's underneath is in good shape and protected as best it can be. Even a thick coat of latex paint with sand sprinkled over it while wet will help the underlayment. Hire people that have lots of experience and have good references is the best advice.

Who supplied the roof deck material for Aloha Stadium, Hawaii in the last two years?
Q. Does anyone know who provided the roofing material for the current roof deck (the section which was replaced recently) on Aloha Stadium?

A. Malaysians




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