Engineered Oak Dilemma

[DeanPA]

Hi

After reading numerous threads on here, I still don't know what to do for the best regarding my flooring.

I plan on securing joists to the concrete floor in our new extension (floor has been down over 12 months so nice and dry) purely to raise the floor to the level of the threshold that the builder put in.

I did want to overboard with ply, and then float an engineered oak floor over the top. Unfortunately it raises the floor too much with 18mm ply, and then boards on top.

The threshold that I need to cover is as pictured:

Untitled

• DeanPA
• 11 Jul 2012
• 1

Instead, I was looking at 20mm engineered oak boards secret nailed directly to the joists. The trouble is the threshold as it's concrete.

So question is, if I ran the boards as pictured, can I secret fix to the joists, but have the end resting on the concrete (covered with DPM)?

If not, what alternatives?

 

[WoodYouLike]

How wide is this concrete threshold?

 

[DeanPA]

Threshold is 280cm wide x 35cm deep

 

[WoodYouLike]

I would apply a liquid dpm on the concrete

 

[DeanPA]

Thanks for the reply.

Will the boards be OK, mostly fixed to the joists, but 35cm ends resting on the different substrate?

In your opinion, should I face fix to the concrete, or leave floating effectively?

 

[WoodYouLike]

You could apply a flexible adhesive, such as Basicoll PU-650SE to be sure