Saturday, 19 September 2015

Beware the Spray Foam!

Misty morning on the lake.  Water levels on this lake fluctuate a lot, and right now they are very low.

Last year we had piled some large rocks on the beach to act as a foundation for a dock.  This year the water went down so low that we decided to extend the foundation out ever further.  But I won't be surprised if in the spring the whole pile is underwater again!

First red leaf!  Sure sign of fall.
 
Had some great helpers adding flashing along the bottom of the walls. 

The flashing will protect the bottom edge of the 2" exterior rigid insulation that will cover the walls, keeping critters out and stopping any air flow from below.  If cold air was allowed to come up from below and make it's way between the exterior rigid insulation and the wall, it could reduce or even eliminate any insulative benefits.  The flashing will be taped to the tyvek, but if I had it to do over again I would also have run a bead of caulk between the plywood and the tyvek, and between the tyvek and the flashing.  I love redundancy when it comes to air sealing!

Although my plans showed the plywood under the floor meeting the wall sheathing perfectly, it didn't always work that way.  So, I got under the house to fill the gaps with spray foam.






It's wonderful stuff, but sticky!  I always wear gloves, but by the end I was wishing I had covered my hair too.  Had a few chunks that needed to be cut off!


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