Bedroom French doors causing damp?

[greenbirdsong]

I live in a bungalow and the previous owner removed the window and replaced it with French doors.

Since the start of autumn every morning we have so much condensation on these French doors. It's literally running down and soaking into the carpet and curtains.

Every morning we wipe it down. Doors are then opened for at least 15 mins to let air in.

But now we're getting mould on the curtains and the carpet and underlay is soaked.

The door were put in about 10 years ago.

Could having French patio doors in a bedroom cause damp?
I'm wondering if they've been poorly installed as of course a bigger hole would have to have been cut in the bricks to install them.

Any advice?

Window in the bedroom!

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It sounds like it's just a condensation issue. Dehumidifier or add some trickle vents if possible.

Watching with interest as I have French doors at the back of my house and there’s often mould around that area.

Condensation running down the inside is due to them being cold - the only way to improve that is add insulation. You might be able to add an extra layer of glass or switch out the existing glass for a double-glazed unit, but probably the fix is to replace them with ones that have enough insulation that they don't get cold on the inside.

It’s cold outside and warm inside. Have you a little window that you can leave ajar.

do you close your curtains at night?

We try not to and keep the air circulation and we have a dehumidifier which solves the condensation issue if air flow is good

This.

It won’t be the doors, it’ll be water from breath and sweat and possibly damp towels / wet laundry.

Get a dehumidifier they are awesome

Or ventilate more to remove the humidity.

Where do you think it is coming from?

Do you drape wet washing inside your home?

Does the bathroom extractor fan work well?

@PigletInABlanketJohn

Nice seasonal name change there! 😃

Also get one of those window vacuums and vacuum the water every morning. The pati doors don’t cause damp, it’s just that the moisture in your house settles on the coldest part which is normally windows and patio doors. You need to work out what’s causing the moisture and try and reducing it, heat more, ventilate more.

I'm in a bungalow and after six months I discovered every floor had rotted because of condensation here - we are on clay. Seller hadn't left me the floor surveys and I discovered she'd had all the floors replaced in 2016 by a cowboy company - cheap chipboard and non tannelised joists with a plastic bag on the end. I spent every penny of my equity on it - which was supposed to see me through to pension age, I do believe in karma.

I've got a Karcher for the windows and a dehumidifer which I move from room to room, but I've decided to have a positive ventilation unit in the loft.

Very sorry to hear that

But I have a feeling the cause will have been, not so much condensation, but excessive under-floor damp caused by lack of ventilation and/or a source of water such as a leak.

Underfloor voids are supposed to be cold and draughty with plenty of airbricks.

Thanks PigletInABlanketJohn. All very strange, I did have an independent damp surveyor in, who did the work for me in wood.

Unfortunately the back of the bungalow has been extended with a concrete floor - the whole of the kitchen/lounge, back of the bathroom, back end of the back bedroom. The concrete floor does have airbricks in the wall outside, they havn't been vented through the concrete to the subfloor void at the front.

No leaks could be seen anywhere when the floors were removed. The men did clean out all airbricks at the front, and make the 'holes' between the front and back of the bungalow floor bigger. I also got them to take out the wide stone plinths in front of the three redundant fireplaces. They said the main problem was in the one floorboarded front bedroom where a repair had been affixed to a very woodwormed joist. The other rooms which were chipboard had been placed on non tannelised wood with a plastic bag piece stapled over the ends.

I had been quoted £10K for wood, £36K for concrete, I didn't have £36K. I was given a 20 year guarantee. About six weeks later I had mould on the one piece of MDF skirting they'd put in and I rang to ask them to replace it, I've not heard back.

I do open the windows every day, have the bathroom extractor fan on, use a dehumidifier when I dry washing indoors, and wipe down the windows religiously. I will be selling once I've got my pension next April, living here is too much hard work for me.

The very very sad thing for me is that I think my elderly sheltie was affected by the mould, he started coughing in January, and died in October the day before his 14th birthday. If the vendor had told me about the floors I would have had them replaced before I moved in - I was in a rental, it was possible.