Water coming through conservatory floor

Question

Just bought a house and was looking to replace the vinyl flooring in the small rear conservatory.

Lifted it up and there was a lot of moisture underneath. I’ve removed the vinyl to try and dry it out, but I’ve noticed water is coming through the flooring.

It looks like it’s coming through the small air holes in the concrete and through parts of the edges.

What is causing this issue? Can I be repaired? What type of tradesperson could help with this?

Vlad & Monika · Accepted Answer

Good afternoon Gina,

This might be simole as Paul mentioned burst pipe un the floor..
But it also might be just water reisi g throught when its raining and not taken away from thw putside walls..  
drainage might be needed around the outside walls of conservatiry.

This is potentially another possible cause but without inspecting  it would be hard to say for certain.

Would recommend to get plumber forat to check pipes..

All the best 👍

Paul · Answer

Hi Gina 
This sounds like you have a burst water pipe.
If it’s an old house there may not be a damp proof membrane installed when built & water is coming up through the slab
Best bet is to get a plumber or building inspector to come round & inspect it but it should be able to be fixed 
Kind regards Paul

Mac · Answer

I would need to see-it first,anything can be fixed as long as its not to far gone! CYRIL

Jeremy · Answer

It sounds like you have no DPM which is a polythene membrane what stops water rising to remedy the problem you need to dig up your conservatory floor and lay a membrane below your insulation and concrete floor

A ground worker is the man for the job

Minhajur Rahman · Answer

You need to check floor concrete if is it ok you just put on underlay otherwise you need replacing your floor concrete

Kevin · Answer

Hi you might be able to apply a liquid dpm dampnproof membrane to stop the moisture

Joe · Answer

There are many things you could use such as bitumen paint stops all leaks it's like a damp proofing paint

Alex Ben · Answer

Water coming through your conservatory floor is likely caused by insufficient waterproofing or poor drainage. Below are possible causes, fixes, and advice on the type of tradesperson to contact.
Causes

No Damp-Proof Membrane (DPM): Older conservatories may lack a proper waterproof barrier beneath the concrete, allowing moisture to rise through the floor.
    Failed Damp-Proofing: If a DPM was installed but has degraded or been damaged, water can penetrate.
    Poor Drainage: Rainwater pooling around the conservatory due to poor external drainage, blocked gutters, or insufficient sloping.
    Structural Cracks: Gaps or cracks in the concrete slab or edges may allow water entry.
    High Water Table: In areas with high groundwater levels, pressure can force moisture through the floor.

Steps to Fix the Issue

Improve External Drainage:
        Inspect and clear gutters, downpipes, and external drains to ensure water is directed away from the conservatory.
        Regrade the ground around the conservatory to slope away from the structure. Install a French drain if water pooling persists.

Seal the Floor Edges:
        Apply a waterproof sealant or silicone around the edges where water is entering.

Add or Repair Damp-Proof Membrane (DPM):
        For severe issues, remove the concrete slab and install a proper DPM underneath.
        Alternatively, apply a liquid DPM (waterproofing paint) over the surface to block moisture from rising.

Fix Cracks and Holes:
        Repair any cracks or holes in the concrete with a suitable concrete repair compound.

Run a Dehumidifier:
        To dry the area while fixing the underlying problem, use a high-capacity dehumidifier to minimize condensation and moisture buildup.

Who to Contact

Damp-Proofing Specialist: To assess and repair or install a DPM.
    General Builder: For structural repairs or relaying the concrete floor.
    Drainage Specialist: To address external water pooling or drainage issues.

Next Steps

Begin by improving drainage to reduce external water ingress. Then consult a damp-proofing expert or builder for a full assessment. Proper sealing, waterproofing, and drainage can resolve the issue and prevent future problems.

Water coming through conservatory floor

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