Christian Tag
11-14-2012, 07:41 AM
Hi there,
My client has an old 1950 duplex in Montreal. The exterior siding used to be aggregate and they've never had any problem.
He recently called a company to install Vinyl siding all around the house and he also changed his old windows for a new PVC with thermos model.
So the contractor simply took off the exterior aggregate siding, he installed +/- 2 inch polystyren insulation panel, then he put the vinyl siding.
2 Weeks ago, the temperature dropped and we started to have cold weather, thats when they realized they have mold on the bottom of their exterior wall (from inside).
When I opened the wall, I noticed a funny structure but most importantly that there was no insulation. Only two sheets of plaster before the structure, then you could see the original solid wood siding.
I didn't notice any mold or humidity inside the wall, but only on the surface of the plaster.
Here are my questions:
1 - Why is there mold only on the surface and not inside the wall (since I thought the cause of the problem is the lack of insulation).
2 - Why is the mold present only on this particular wall and not the others since all the exterior siding has been changed.
3 - How could an exterior wall hold and support the upper floor weight without 2 x 6 structure like I normally see.
Sorry for my bad english, I'm french canadian : P
My client has an old 1950 duplex in Montreal. The exterior siding used to be aggregate and they've never had any problem.
He recently called a company to install Vinyl siding all around the house and he also changed his old windows for a new PVC with thermos model.
So the contractor simply took off the exterior aggregate siding, he installed +/- 2 inch polystyren insulation panel, then he put the vinyl siding.
2 Weeks ago, the temperature dropped and we started to have cold weather, thats when they realized they have mold on the bottom of their exterior wall (from inside).
When I opened the wall, I noticed a funny structure but most importantly that there was no insulation. Only two sheets of plaster before the structure, then you could see the original solid wood siding.
I didn't notice any mold or humidity inside the wall, but only on the surface of the plaster.
Here are my questions:
1 - Why is there mold only on the surface and not inside the wall (since I thought the cause of the problem is the lack of insulation).
2 - Why is the mold present only on this particular wall and not the others since all the exterior siding has been changed.
3 - How could an exterior wall hold and support the upper floor weight without 2 x 6 structure like I normally see.
Sorry for my bad english, I'm french canadian : P