Shed Ventilation

[minibarrow]

Have recently had garden landscape and a new shed and summer house installed.
Lately having problems with dampness and mould around wall/floor base.
Have put in dehumidifiers which are working but still had damp patches.
I am looking at install some sort of extractor fan and was after any ideas that maybe on the market.
Would like a plug in version so i can put on a plug in timer, but if needed can use a bathroom version (but can these be converted to a plug) or just wired into a fused switch so can be on all the time.

Any information or help would be appreciated.

 

[JohnD]

does the floor have a dpm? if not it will be wicking water up from the ground, which in the current wet spell will be a lot.

if the shed is unheated, you can give it as much ventilation as you like. Gaps round the eaves will do.

Have you got guttering and a downpipe to prevent water running from the roof onto the walls ands base?

 

[minibarrow]

does the floor have a dpm? if not it will be wicking water up from the ground, which in the current wet spell will be a lot.

if the shed is unheated, you can give it as much ventilation as you like. Gaps round the eaves will do.

Have you got guttering and a downpipe to prevent water running from the roof onto the walls ands base?

hi john d,
the shed has a wooden floor onto a patio area. there is no guttering on the roof. the shed is not heated

 

[JohnD]

OK, so the lack of guttering will make it damp. You could add guttering and a rain-butt fairly easily.

how deep is the gap between the patio and the wooden floor, and how well is it ventilated?

 

[minibarrow]

OK, so the lack of guttering will make it damp. You could add guttering and a rain-butt fairly easily.

how deep is the gap between the patio and the wooden floor, and how well is it ventilated?

Got rain butt so guttering is easy to intsall, Gap between fllor and patio is about an inch
the picture shows what it looks like patio to shed floor from the front ( this is a google picture not actual shed)[/img]

Untitled

• minibarrow
• 27 Dec 2012
• 1

 

[JohnD]

the guttering will reduce the amount of water getting under the floor. Once installed have a look after rain and see if it is fairly dry or if there is a slope causing it to run under.

the gap under the floor is very small (it would be better if the bearers were raised on paving slabs or something to lift them above the damp) but if unobstructed, airflow will help ventilate it

 

[minibarrow]

the guttering will reduce the amount of water getting under the floor. Once installed have a look after rain and see if it is fairly dry or if there is a slope causing it to run under.

the gap under the floor is very small (it would be better if the bearers were raised on paving slabs or something to lift them above the damp) but if unobstructed, airflow will help ventilate it

will do the guttering and rain butt but dont know if i could raise the floor as it is a loaded shed and summer house and lifting couldd be a problem

 

[ban-all-sheds]

Have recently had garden landscape and a new shed and summer house installed

Was it done by a reputable company?

does the floor have a dpm?

Doesn't look like the sort of shed which will come with one.

the gap under the floor is very small (it would be better if the bearers were raised on paving slabs or something to lift them above the damp)

It would be much better.


Minibarrow - did the shed manufacturer not specify any particular gap?

Another thing which would have been much better, and which will also now be very hard to fix, would be for the shed not to be sat on the patio paving, as when it rains water will just run underneath it. Ideally shed bases should be no larger than the shed, and surrounded by a small trench filled with gravel* to reduce the changes of water splashing up onto the walls.


* Or, as a cool alternative, that crushed glass they sell in garden centres, with LED rope lights buried in it.