Garage damp and condensation
Garage damp is usually a leaking roof, blocked gutters, ground piled against the walls or a floor with no damp-proof membrane. Condensation drips from cold metal or fibre-cement roofs when warm, wet air meets them: ventilation, an anti-condensation lining or insulation under the roof stops it.
Why garages get damp, why metal roofs drip, and the fixes that work.
Free and no obligation. Your plan goes to one builder, not a list.
- Roofthe usual source
- Ventskeep air moving
- DPMunder a new screed
- Liningstops sheets dripping
Find the cause
- Roof: check the covering, the edges and the flashing at the wall.
- Gutters and downpipes: clear and running away from the walls.
- Ground level: soil or paving against the walls bridges damp; keep it below the floor.
- The floor: a damp-proof membrane under a new screed.
- Ventilation: airbricks or a vent so wet cars and washing don't fog it up.
Dripping sheets
Metal and fibre-cement sheets drip when the air under them is warmer and wetter than the sheet. An anti-condensation lining, or boards under a breathable membrane, stops it. Old fibre-cement sheets may contain asbestos: check first.
Plan your garage renovation
A few quick taps: what your garage needs, what the roof and door cost, and the order to do it in. Contact details come last, and only if you want a price.
Your garage, the roof: €1,800 to €3,500.
How the estimate is worked out
Roof and door ranges are what Irish roofers and door companies publish for the same job: the lowest to the highest figure. A double garage roof is its area times the rate for the covering. Floors, walls, windows, insulation and electrics vary too much from garage to garage to price fairly without seeing them, so the builder prices those on a visit.
Questions before you start
Why is my garage roof dripping?
Condensation on cold sheets, or a leak. A lining or insulation under the roof stops condensation; a leak needs a re-roof or repair.
How do I stop damp in my garage?
Fix the roof and gutters, keep ground below floor level, ventilate, and put a damp-proof membrane under any new floor.
Every guide and county page
Jobs
Costs and guides
Get the garage sorted, in the right order
Pick the garage and the jobs to see what the roof and door cost and the order to do it all in. When you want a price, your plan goes to a single vetted builder for your area.