BUILT UP ROOF SYSTEMS

We recommend that, once your frame is erected, you get a roof on as soon as possible. We also feel that a roof should be ventilated.

We have been installing built up roofs for roughly twenty years. It is our opinion that this method provides the most energy efficient R-value of insulation at a lesser material cost than roof SIPs. A vertical roof over panels requires lath and another layer of plywood. Our method is less redundant and usually can be installed by a three man crew without the use of a crane, which is necessary with roof SIPs.

Generally, this process utilizes the following items in their respective orders: tongue and groove boards placed and fastened on top of the timber frame; two layers of 3" thick 4x8 sheets of high density extruded polystyrene for a total of 6" of insulation; 2x4's on the flat running from the ridge to the eaves at 2'-0" on center; and 5/8" CDX plywood. The final roofing material of your choice would be applied on top of the CDX plywood. There are, of course, variations to this method, depending on the particular job and local requirements.

As with SIPs, we would be happy to supply and install the built up roof, however, it is also a process that your general contractor may feel comfortable with. If your general contractor chooses to handle this process, we would be happy to supply one of our men to get the installation started.

Click here to read an article published in January 2005's, The Journal of Light Construction.