Sunday, August 22, 2010

Insulation Work Started

I've started installing the insulation in the bedroom ceiling and walls.  I'm using R20 fiberglass batts that are approximately 6" thick. 

The walls will get one layer, and the ceilings will get 2 layers.  That'll give me an insulation value of R40 in the ceilings.  The building code only calls for R28 in ceilings, but most new construction and remodel jobs have R40 or higher.

Sunday, August 15, 2010

Preparing for Roofing Insulation

I'm getting ready to start insulating my roof now. The first thing I have to do is install the insulation baffles... also known as insulation stops or rafter vents.

The roof is designed so that there will be an air space between the insulation and the bottom surface of the roof sheathing. That space allows air to move freely from the soffit vents under the eaves up to the roof vents at the peak. That air movement will help to prevent condensation from forming in the roof cavity during the winter and keep the roof cooler in the summer.

The purpose of the insulation baffles is to preserve that air space by preventing the insulation from touching the roof sheathing.  The baffles also prevent any insulation from falling into the soffit area underneath the eaves.

The baffles are made of thin styrofoam and are simply stapled to the bottom side of the roof sheathing between the roof trusses.  The molded shape of the baffle ensures that there is space for free air movement between the baffle and the roof sheathing.

Wednesday, August 4, 2010

Rough Plumbing Completion

Now that my rough plumbing inspection is done, I was able to connect the roof vents with the rest of the drain/waste/vent system. (Just to back up a bit… the reason for not connecting them earlier was so that the rest of the system could be pressure tested.)

So far in this house project; designing and installing the DWV system was one of the most enjoyable things I’ve done. I’m kind of sad to see it finished.

The photo on the left shows the capped-off vent pipe. I simply cut off the cap and then added an elbow and another piece of pipe that continued up to the roof vent.

The completed main vent line; top to bottom.