rigid insulation

We live in Ontario, Canada and gutted our finished basement and will upgrade the insulation. However, there is one section where the stairs go down into the basement that limits the thickness of insulation we can use. The stairs were built right up against the block. So we only have the 1.5”...

I'm residing my house and would like to add 3/4" rigid insulation over the sheathing to give my house a little higher R-value. I'm wondering if I can put the rigid insulation behind the cultured stone I'm installing around the base of the house? If so would I install it the same way I would if...

So, tomorrow morning my roofer is coming to install about 1000sq feet of torch down modified bitumen on my 1905 townhouse in DC over 2 roofs. Included in this, they are installing 2" insulation boards underneath the membrane. Also, they will be installing 2-way breather vents on my roof...