Rotten egg smell in bedroom

[matthelliwell]

I'm looking for ideas as to what may be causing the rotten egg smell in our bedroom. We get a distinct smell of rotten egg near one wall, opposite the window, near the door. The wall has a radiator on it. We first noticed the smell sometime around when we decorated (lining paper on 1930s plaster, wickes emulsion on the walls/ceiling and gloss on the woodwork, cork underlay and bamboo flooring).

The strength of the smell varies. It seems strongest at the end of a hot day, like yesterday evening - the room stank! Sniffing various wall, furniture etc doesn't help - non of them seem to be giving off the smell, at least to our noses.

So far our conclusions are:

1. The smell is bit more shit-like than natural gas smell so I don't think its the old boiler. Also yesterday the boiler was off apart from the pilot light. There was not smell around the boiler but it was smelly upstairs.
2. I've checked the guttering and it was fine. The outside wall of the bedroom could do with repointing but its very sheltered and has been like that for years.
3. The smell doesn't smell damp, more of a cross between rotten eggs and faeces and there are no signs of the rad leaking.
4. There aren't any drains near the bedroom to check.
5. The foul drain runs nearer other rooms than the bedroom (like the lounge) so if there was a problem with those I'd expect to smell it elsewhere as well. I've looed at the drains in the past year and the looked fine.
6. I've been up in the loft above the room. No sign of the smell, plenty of venitilation and insulation not blocking the eaves.
7. We've had the floor boards up just outside the room (didn't want to disturb the new floor!) and there was no sign of the smell under the floor.

The only useful info I've found is that some people have reported a similar smell with Crown paint. I'm tempted next to try and seal the walls with something and repaint.

Anyone have any further bright ideas?

Thanks

Matt

[KMCI]

We have the same problem. Have you seen this article? How to Tell if You Have Toxic Drywall There are some telltale signs that your home's walls may be tainted from toxic Chinese drywall. The first giveaway is the smell of sulfur, often likened to rotten eggs. Some homeowners began to notice that their home air-conditioning systems were failing early and often. This is due to corrosion on copper wiring caused by the drywall. If you've noticed that your HVAC system has failed and the copper wires are now coated in black residue, you might have problems. Other appliances have been affected as well. If your stove and oven heating elements and refrigerator coils have been failing, it's likely due to the bad drywall. These issues are only red flags if your home was built or remodeled between 2005 and 2008, and mainly in the coastal southern United States, although smaller numbers of houses are suspected to be affected in up to 41 states.

Some other warning signs in your home include:

Failure of information displays on TVs, DVD players, radios and microwaves Light bulbs burning out at a faster rate Silver jewelry and utensils may be tarnished Failure of satellite TV receivers These are just warning signs directly related to the structure of your home. There are also health effects to look out for. If you're living in a high-risk house and you've noticed respiratory issues, nose bleeds, rashes, headaches, coughing and sinus problems, you could be suffering from issues tied to toxic drywall. No formal health studies have been conducted as of May 2009, and the Knauf company has denied that the off-gassing from their drywall is any real cause of health concern. But if the drywall is tarnishing silver and corroding copper wiring, it can't be a coincidence that these same homeowners have suffering health.

There have been no confirmed deaths from families living in homes with the bad drywall, but Florida House Representative Wexler has received information about children that have required hospital stays and surgery due to respiratory complications believed to have resulted from the tainted gypsum. Some families have had to move out of their homes, and builders have already begun stripping houses down to the frame and replacing the drywall, which is the only solution. Some fear that even that won't completely rid the homes of the sulfur smell, which is thought to be seeping into the wood itself.

If you suspect that your home has toxic drywall, you can call the Homeowners Consumer Center at 866-714-6466 or contact them at their Web site --