Literally 90% of house roofs are either gabled or hipped. It renders an aesthetically pleasing visual component to house exteriors. But what about your house? In more recent designs for shower pans we now see plumbers adding a drainage gap above the waterproofing layer and so the technology of plumbers and roofers has gone full circle. No drainage without a drainage gap. So after we drain and drain again and provide drainage gaps and slopes to the drain what next? And everything slopes to the drain. You also drain the water control layer. Figure 2: Old Fashioned Shower Pan-Look at that beautiful double drain and the two lines of water control — the top of the tile and the waterproofing layer or «shower pan» (OK, maybe three lines if you count the dampproofing underneath the whole kit and kaboodle). It’s how old guys used to do shower pans (Figure 2). Plumbers figured out this stuff before roofers figured out this stuff, and before Max Baker put it down in writing for the rest of us. The key to the images in Figure 3 are the provisions for drainage both above the insulation layer and below the insulation layer. The traffic surface protects the waterproofing membrane or the «water control layer.» And just as important, there is a drainage gap above the water control layer/waterproofing membrane.
Remember to drain above and below the insulation, and you can’t drain without a gap. The roofers recognized that not a lot of drainage occurred in the mortar bed (despite the crushed stone around the drain); it was more like seepage and so in roof decks and balconies the roofers introduced a drainage gap. Photograph 4 shows the layers working together-the rigid insulation, the filter fabric, the pedestals and the stone pavers. Photograph 4 (middle right): Layers Working Together-The rigid insulation, the filter fabric, the pedestals and the stone pavers. In this particular example we have stone pavers. In this particular example the lower drainage gap is created by grooves in the underside of the rigid insulation. You can’t have drainage without a drainage gap. The pedestals elevate the traffic surface providing a drainage gap over the top of the insulation. We know this answer already from the «Perfect Wall.»3 On the top of the structural deck and over the top of the water control layer, the air control layer and the vapor control layer. Over the top of this goes the rigid insulation-the thermal control layer. Photograph 2 (top right): Thermal Control Layer-Over the top of the waterproof membrane goes the rigid insulation-the thermal control layer.
However, there’s still more to learn so you can find the right asphalt shingle for you. Though this range is comparable to the costs of other premium roofing products, higher-end metals run as much as 10 times the cost of asphalt shingles. That pretty much means extruded polystyrene (XPS). This insulation layer is typically extruded polystyrene (XPS) (Photograph 2). In this particular example the lower drainage gap is created by grooves in the underside of the rigid insulation. This insulation layer is typically extruded polystyrene (XPS). A filter fabric keeps crud out of the joints of the insulation layer. At some point in the late 1890s, the settlers started building houses, schools and churches out of straw bales. This N Roof Deck type’s name likely owes its name from the Scottish word «kirkin-head,» which means «church roof,» suggesting that this was used as the roof of choice for old Scottish churches or places of worship.
For the rainwater thing we need to go to one of the Old Masters once again (Figure 1). Max Baker.1 Note the approach: drainage below the traffic surface. Now some of you folks who are older than Aaron Rodgers2 will recognize double-drains from old plumbing textbooks. Ah, now the condensation part. More important than condensation? Learn more about that in the Structural Engineering Rebate Application (.pdf also attached below). Are you more concerned with staying warm in the winter, cool in the summer, or both? Summer or winter, the interior temperature and humidity remained the same (in theory, at least). Now that everyone thinks all of this is pretty easy it is time for a few curves. Now we insulate. Where is, absolutely, the best place to add insulation? Rainwater control at its best. It is also equipped with an integrated drainage system that collects and carries out the rainwater.