I am renovating a basement built on a slab on grade (1976) where the previous owner constructed the basement in what was customary for that time, i.e., sill, wood studs, plastic against the slab, then mineral wool insulation and chipboard.
I am in the process of removing all organic material and plan to install an Isola blue Platon floor and put in metal studs and drywall on it (without a vapor barrier) and air gaps between the floor and baseboard as the house has mechanical exhaust ventilation and is quite dry otherwise (I insulated from the outside and drained last year).
Now to the question:
I would like to keep the staircase and need tips on how to get the Platon mat under the staircase construction without risking the load-bearing capacity. Tips are gratefully received! See two pictures I took underneath.
I am in the process of removing all organic material and plan to install an Isola blue Platon floor and put in metal studs and drywall on it (without a vapor barrier) and air gaps between the floor and baseboard as the house has mechanical exhaust ventilation and is quite dry otherwise (I insulated from the outside and drained last year).
Now to the question:
I would like to keep the staircase and need tips on how to get the Platon mat under the staircase construction without risking the load-bearing capacity. Tips are gratefully received! See two pictures I took underneath.
Best answer
I did not go under the stairs with the platon mat but ended the platon right before the stairs with a sealing strip. The few square meters under the stairs hidden behind a door were just painted concrete, so we left that area "bare" except for the paint. If you need to replace/seal any beam under the stairs, I would simply put in a new beam with a bit of sill insulation underneath.
That's what we did in the basement where there were pressure-treated beams under the door frame and threshold. We knocked out the old treated ones and put in new ones made of regular beams with a strip of sill insulation underneath. Under the stairs, there was actually a small area with wood in contact with the slab and completely dry, so we didn't do anything about it.
That's what we did in the basement where there were pressure-treated beams under the door frame and threshold. We knocked out the old treated ones and put in new ones made of regular beams with a strip of sill insulation underneath. Under the stairs, there was actually a small area with wood in contact with the slab and completely dry, so we didn't do anything about it.