Repair rot on back door frame.

[Bigempty2025]

I was wondering how hard it might be for a amaoto repair some rotting wood at the end of the door frame.

Tbrr is about 3 cms where you can feel it's rotten on the wood going up the side of the door.  The rest of the wood on the bottom of the door and the door itself feels OK. 

Thanks in advance. 

 

[JacobZ]

Hi @Bigempty2025,

Thank you for reaching out for assistance with the rot at the base of your external architraves.

If the rot is not to the point where the timber is like cardboard and will fall apart when pressed, then the simplest solution is to apply a wood hardener to the affected timber, allow it to soak in and harden the timber, then paint over the top with a suitable exterior paint.

If the rot is more severe, then I'd suggest you use a multitool to cut out the rotted section of timber and replace it with a matching H3-treated timber trim that is cut down to fit in the gap and then secured in place with a few finish nails. If you can measure the width and depth of the timber and advise if that inside edge is square or slightly angled, I could certainly recommend a profile of timber to match.

If you need to cut out and replace the timber, the seam between the old and new timber can be filled with No More Gaps Exterior Gap Filler, smoothed and then painted over. Before installing, the end grain of the timber should also be sealed with some exterior paint as this will help prevent the recurrence of rot.

With either of these repairs, I would then suggest you apply a bead of silicone around the base of the timber, as the reason it has rotted is that water that is sitting on the decking boards has gotten under it and has wicked up through the end grain of the timber. Applying a bead of silicone at the base of the timber will help to prevent this water from finding its way into the end grain of the timber in future.

Let me know what you think and if you have any further questions, please don't hesitate to ask.

Jacob

[Bigempty2025]

Thanks @JacobZ.

Looks like best option is to remove the bottom park. The trim is 800mm wide 20mm deep with a slight angle on one the inside. (hope that makes sense).

What wood do your room recommend? 

[JacobZ]

Hi @Bigempty2025,

Could I get you to double-check those measurements and be as specific and accurate as possible?

They don't match up perfectly with any profile I am aware of, but the shape and size are very close to a 92 x 18mm Bevelled Pine Moulding. Please just view this product as an example of the profile, as this is an interior timber product and would not be suitable in this situation.

Woodhouse, the supplier of that trim, does produce an H3-treated version in their Woodhouse Weatherproof range; however, it appears that you would need to Special Order it through your local store using the WP9218BE product code shown below.

If your measurements are spot on, then you could still use this profile; you would just need to plane or rip it down to match the width of the existing profile and pack out the back of the timber a little bit. Being a small piece, this shouldn't be too difficult to do.

Let me know what you think and if you have further questions, please don't hesitate to ask.

Jacob

[Bigempty2025]

Hi @JacobZ,

I think it's closer to that 92 width, I only measured the front of the board not including the angled part. 🙄

[EricL]

Hello @Bigempty2025 

Just a friendly reminder that the timber piece you've purchased can be returned and exchanged for one that is closer to the trim that you need. Please keep in mind that the timber must not be cut or damaged in order to process the exchange.

If you need further assistance, please let us know.

Eric