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I've lived here 11 years without any floods or overflowing drains, so I to am wondering whether we're looking at the same images? All I can find on Google Earth is a fuzzy overhead picture of the block, where it's difficult to make out my townhouse. Could you let me know the Google pages you're...

Interesting observations and food for thought. Here are some more facts: 1. After a prolonged dry-spell the garage floor has almost completely dried out! 2. The road gutter is about 19m from the garage, down a worn macadamed drive. 3. Using a laser-level, I've measured the road-gutter at...

Sorry guys for delay in updates but I've been away on business and I'm rather tied up at the moment. Can definitely confirm that there is NO internal leak or condensation in the garage or boiler room. In July I plan some holiday and will turn off the water supply at the street stop-cock...

Saga continued. Just back after few days away. The water meter readings on return was EXACTLY the same as when I left, i.e. zero consumption! BUT the garage floor is still damp, even after the 3 hottest days so far this year. Last Tuesday it started to dry out but was damp again Wednesday...

The internal mains stop-cock is located in the hall ~6m from the damp patch. After wrapping every water-pipe joint in the garage with paper towel and seeing no sign of dampness, I'm now 99.9% sure that the source of water is below the garage floor. I made a close inspection of the...

Hi John, After a cooler night, there is absolutely no sign of water on top of the plastic sheets covering the garage floor. As a control, I placed a saucer of water on the corner of the sheet and there was very little evaporation. Tonight I'll spread some talcum. There is a stop-cock located...

Hi bogwart47 If you can access the Plan and photos posted to the Forum you'll see the layout but to answer your questions: 1. Yes there is a garage the other side of the wall but it is completely dry. 2. No, none of the overhead pipes (original build), are above the dampest patches and they...

Looks like that BUT there are no records of underfloor pipes OR any services routed that way! Mains water comes in across driveway under front door and runs up through 1st floor kitchen to cold water tank in attic. Then feeds hot water cylinder on 2nd floor. All hot and cold feeds to ground...

Plan View and photos of garage uploaded. Key Facts: 1. There has not been rain for past week 2. No car in garage for past week 3. Garage and rear doors left open with through draft for last 3 (hottest days) with no sign of drying! 4. Front of garage is Macadam, to rear of house is communal...

Plan view and photos of garage

I'll be happy to post pics & diags. How do I upload these to forum?

Thanks for a thought provoking response. The house is built on sandstone, well above the flood-plain. There appear to be 2 sources of damp, about 1m apart, both against an internal dividing wall and below the dpc. There is no sign of dampness in the wall (or ceiling!).

I live in a 40 yr-old terraced town house with the garage on the ground floor. A spreading damp patch has suddenly appeared in the garage concrete floor. There are no water-pipes under the floor, or leaks from pipes in the garage. My neighbours do not have any damp showing in their garages...