Airtight and watertight window installation

When the windows of a house because of one ventilated rain cover, the flashing details can be tricky. To connect them Open the window roughly outwards Sheathing of the ZIP system, we used our cutoffs from cutting the window opening to create a window frame to connect the inside and the outside.

Next, we’ll add a beveled sill piece at the bottom of the window. We do this to direct any water that gets into the window assembly back into the ventilated area rain protection. I took pieces of the ZIP sheathing, ripped them to the width of the window, then added a 1/4-inch on the inside. Ripped a 1 × 4 to give me the bevel and slope that go out into the ventilated rain cover.

Our next step is to roughly open the window and connect it to the outer rain cover. I chose to use the ZIP System Flashing Tape because it offers good material continuity. We use the ZIP wrap all over the rough opening, and this tape helps guide the water into the rain cover. It completes this seal and also gives us our airtight, rough opening through the window.

When opening the window roughly, the aim is to give the water a direct route into the rain shelter. This can be achieved with ZIP tape simply by following the standard installation procedure of overlapping seams and rolling up the tape. The ZIP tape can also be used to flash the delicate inner corners of the window frame.

Our next step is to add this 1 × 4 frame around the perimeter. This is the same material that we make the rain cover out of and that will bring this window to the rain cover layer. To complete the rough opening, we use the ZIP tape again to flash the rough opening for rain protection 1x material.

Check for plumb, level and square

Next, we’ll install the window assembly and underlay the opening to make sure the window is plum, level, and square. Finally, we glue the window louvers to our 1x rain protection material. I only tape the sides in the head so the water can drain off our sill, but to prevent wind-blown rain from getting in, I add a counter-lightning bolt on the bottom and just glue it to the bottom fin (not the rain cover ). ). If you are in a coastal area, you may want to use stainless steel for this. I happened to have this plastic material left over from another installation and I decided to use this material.

The final step inside my window installation is to use a pre-folded airtight tape. I got to know this tape in a passive house training course. I think it’s a really great way to ensure you have a very airtight window installed by getting that extra layer of airtight protection both inside and out.

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