Door sill protection

[Planeiron]

What options are there available to protect a sill at the door? Everywhere else, the sill is nice and dry. This is a small oak frame on a pier and curtain foundation and will have a suspended floor. The rough door opening is framed in and the door will open inwards. I can't find any info in the framing books I have and I've tried finding some technical drawings and info on the net but am unsure how to proceed. I suspect the answer is to install a "sill pan", but that's something that just doesn't seem to be available in the UK. Alternative suggestions or any advice would be great anyway as it might help in getting a sill pan fabricated if needed. Thank you

[beenthere]

I'd search for "aluminum door threshold" and hope it comes up in the UK

[SwampDonkey]

Something like....but not a product endorsement.

https://www.amazon.co.uk/M-d-Products-Commercial-Threshold-11502/dp/B000CRKDRG/ref=sr_1_1?sr=8-1

[Don P]

Make sure the pan flashing also extends up the backside of an Appropriate threshold. There are images online, solder copper or beat lead if nothing else.

R703.4.1 Flashing installation at exterior window and door openings.

Flashing at exterior window and door openings shall extend to the surface of the exterior wall finish or to a water-resistive barrier complying with Section 703.2 for subsequent drainage. Air sealing shall be installed around all window and door openings on the interior side of the rough opening gap. Mechanically attached flexible flashings shall comply with AAMA 712. Flashing at exterior window and door openings shall be installed in accordance with one or more of the following:

• 1.The fenestration manufacturer's installation and flashing instructions, or for applications not addressed in the fenestration manufacturer's instructions, in accordance with the flashing manufacturer's instructions. Where flashing instructions or details are not provided, pan flashing shall be installed at the sill of exterior window and door openings. Pan flashing shall be sealed or sloped in such a manner as to direct water to the surface of the exterior wall finish or to the waterresistive barrier for subsequent drainage. Openings using pan flashing shall incorporate flashing or protection at the head and sides.
• 2.In accordance with the flashing design or method of a registered design professional.
• 3.In accordance with other approved methods.

[Planeiron]

Thanks all. Seems in the US you're able to pick pan flashing off the shelf. Not the case at all in the UK. I have basic metal working skills and was concerned about fabricating a decent watertight corner join at the rear upstand or backdam. Beating  lead was my plan B. However I've since seen a nice video on YouTube showing this being fabricated in aluminium without brazing or welding:



https://youtu.be/UvZuIm1sE1A?si=E4VqP_14SpdNyxka

One other point I noted somewhere was not to have the metal pan directly resting against frame timber as condensation on cold metal might overtime cause issues. I suppose slipping a little waterproof material between pan and sill would mitigate this.