Underlays

just took up old carpet and underlay only to fined damp and mould on the concrete floor and it looks like it?

has ate away at the concrete has any one got any ideas on how to treat the floor

Public Comments

1. You should apply an acrylic latex floor paint.
2. You need to use an epoxy bonding sealer followed by an epoxy tanking sealer which you should be able to find in builders merchants.
3. get a builder in and be prepared to fork out about £5,000. Hope your buildings insurance covers it.
4. If it's the ground floor, you need an air space with vapor barrier to prevent this.....a job for a professional. The present situation may dry out once exposed...use a spray of dilute chlorine bleach on the mold, but the concrete may need repair. The problem is ground water working up into the slab.
5. The first thing you need to do is kill all the mould. Then you need to find the source of the dampness and fix it, or you will eventually have the same problem again. A dehumidifier might be part of the solution. Cleaning the concrete floor thoroughly with bleach will kill the mould. Make sure everything dries thoroughly before you do anything else with it. I would then ask at a store such as Lowe's for a good product to seal the concrete - there are several good paints for concrete. When you are certain you have solved the cause of the problem, continue with new carpet if you want carpet. Best of luck with it.
6. Firstly I would find out why it's damp. Once you sort that you can find out how to repair the floor.
7. treat it with synthaproof or if you can afford it dig it up put a good membrane in and re-concrete and screed//Iwould suggest you get a builder to do it and make sure you get a builder
8. Mold wouldn't eat concrete, but it's possible pourly installed concrete would be porous and also allow water vapor below the slab to migrate through the slab and collect on the backside of the carpet pad. What you do depends on how big the area is. Wash the concrete with a bleach or TSP solution first to kill the mold. If this is a small area, you could chip away at the eroded spot, clean it and patch with a cement mortar mix. If the mold and bad concrete is over a large area, clean and paint the slab with an asphalt based paint before re-carpeting to provide a moisture barrier, to keep any mold growth on the slab side. You should look at the rain water drainage outside around this slab to determine why you have excessive moisture under the slab that may be causing the mold. To much water under good concrete slabs can cause mold. Make sure the ground slopes away from walls, and roof downspouts discharge into storm drain piping, or at least on spalsh blocks leading away.
9. Most molds ca be killed with common bleach and water. After a complete cleaning , Buy some floor patch sold at most lumber stores or hardware stores. Also called Skim-Coat or floor leveler. Follow the instructions on the label and let dry completely. usually about 48 - 72 hours. Then paint the floor with Kills, also sold in most stores...
10. You can buy a paint on DPM (damp proof membrane) from a company called tremco. This is applied to the surface of the concrete eliminating the need to dig it all up.