Even without the underfloor heating, tiling on top of a recently-screeded concrete floor requires an uncoupling membrane. It’s not necessarily a question of the screed “cracking”, and the cracks passing through to the tiles – it’s more that the concrete slab and the screed will shrink for months, or even years, as they dry out. Soft Ornaments Font more. The stresses set up will transmit themselves through to the brittle ceramic tiles. An uncoupling membrane helps these shrinkage movements to “slide” beneath the tiles without cracking them. Ceramic tiles laid on top of underfloor heating pipes or cables also need flexible tile adhesive and grout, and “soft joints” around the edges of the room – all to accommodate the thermal expansion and contraction, as well as the shrinkage and settlement of the concrete floor. Q: I live in a Victorian terraced house with a small cellar. We had the cellar made into a usable space – the floor was lowered and it was lined and tanked to make it waterproof.

We have two brick air vents which allow fresh air in. Condensation and moisture often form on the cellar concrete ceiling near the air vents. This tends to drip onto the floor. There are some black mould spots, too. I have lagged the cold water supply pipe nearby (which was always wet before I lagged it).

But what is causing the moisture and what can I do to stop it? SR, London A: A cellar, by definition, is below ground. Tanking the walls might stop groundwater penetrating sideways through the walls and upwards through the floor, but it will not reduce the high humidity that occurs in any below-ground structure. When this humid air encounters a cool surface, such as the incoming cold mains water pipe, or the “concrete ceiling” above (which sounds like the underside of the front doorstep), then it will condense out as water droplets.

You could install permanent heating in the cellar, although this would probably be expensive to run. Or you could use a dehumidifier, preferably with a “permanent drainage” attachment. Ice Cream Powerpoint Templates - Ice Cream (ppt) Powerpoint Backgrounds.

The cause behind cracked ceramic or porcelain tiles can be difficult to. Following are seven reasons why your floor tile has cracked. American Express Buyer Initiated Payment Bip Program here. Keep in mind that this is. How to Prevent Tile Cracks. These materials earn their keep over a wood-framed floor—especially one with long joist spans that are prone to deflect under load.

Otherwise you might just have to accept that a cellar is not a habitable space, and will always be cool and humid – great for storing wine, though. Read more: Read more.