Thresholds

Fayre

We are direct labour no builder.

At the front door and 2 back doors of my house a space was left where no concrete was poured when floors were being poured. I believe this was to give the door installers some room for manoeuvre.

After doors were installed I asked the plasterer to fill these spaces so they filled it with sand + cement which is now set. In the case where the room is tiled there wasn't an issue, just covered this filled in bit with tile. But in the other 2 cases (front door + 1 back door) the finished floor is polished concrete so there's no floor covering.

The back door would need something 4 inch deep to cover it and the front door would need something 8 inch deep. The metal threshold coverings I've seen in the building supply shops are not deep enough. Any suggestions or experience?

dathi

Fayre wrote: »

We are direct labour no builder.

At the front door and 2 back doors of my house a space was left where no concrete was poured when floors were being poured.

After doors were installed I asked the plasterer to fill these spaces so they filled it with sand + cement which is now set.

so you gave no thought to the massive thermal bridge you were creating at the doors ?

Fayre

dathi wrote: »

so you gave no thought to the massive thermal bridge you were creating at the doors ?

The people who would have poured the floors are no longer involved in the project.
I wasn't aware of the gap til the doors had been fitted and saw the hole there. I asked the plasterers about it and they said 'there's always a gap left like that at doorways'
This is the only house I've ever built so I dont' have any experience of what's normal. The plasterers agreed to fill it for me.

BryanF

Show us the threshold detail your arch tech prepared that you gave to the rising wall/ flooring installer?

tabby aspreme

If it's an aluminum threshold you want for the back door , google "door threshold Greenogue business park"for a company that supply thresholds 100mm wide or maybe wider.
For the front door could you paint a piece of nicely finished timber to match the door , or if you have not enough depth for timber a piece of folded aluminum sprayed to match the door

Fayre

BryanF wrote: »

Show us the threshold detail your arch tech prepared that you gave to the rising wall/ flooring installer?

I can see all types of details but none with the word 'threshold' in there.
The closest one is 'jamb detail' would that be it? I looked through them all

Fayre

dathi wrote: »

so you gave no thought to the massive thermal bridge you were creating at the doors ?

Are you saying that normally no gap is left to give the door installer some play?

Calahonda52

Fayre wrote: »

Are you saying that normally no gap is left to give the door installer some play?

What's normal is now irrelevant, you need to think about how you might consider some remediation here for the thermal bridges before you go much further.

In passing, can you post some pictures showing the outside: am interested in if there is a risk of driving rain and also where the door sill is vis a vis the DPC

THE DON FANUCCI

Fayre wrote: »

Are you saying that normally no gap is left to give the door installer some play?

always a gap left. and has been for the last 100 years. usually filled with sand and cement or ready mix. and a strip of DPC on the outer edge to stop dampness.

you need to kango/cut it back out and add in readymix so you can get your polished concrete look . dont forget dpc for dampness or you'll get damp floor or even a strip of pir insulation sumwhere to prevent thermal bridge around there. dampness would be the bigger concern though.

Fayre

THE DON FANUCCI wrote: »

Fayre wrote: »

Are you saying that normally no gap is left to give the door installer some play?

always a gap left. and has been for the last 100 years. usually filled with sand and cement or ready mix. and a strip of DPC on the outer edge to stop dampness.

you need to kango/cut it back out and add in readymix so you can get your polished concrete look . dont forget dpc for dampness or you'll get damp floor or even a strip of pir insulation sumwhere to prevent thermal bridge around there.  dampness would be the bigger concern though.

Here's a photo of the outside of the back door. You can see the red air-tightness membrane under the door. I don't see the DPC you're talking about, do you think this is something I need to try and fit now retrospectively? Where could I put the PIR - in the gap shown here?