DAMP SUMMERHOUSE

[PortlandBill]

My Summerhouse is Tongued and grooved
For the past 3 years I have applied 3 coats Ronseal Fencelife plus in Cornflower
The inside I have treated the knots and again every year I apply 4 coats white emulsion
Every year damp comes through
Is there anything I can apply on the outside over the multicoats Ronseal fencelife plus
or
The inside to stop dampness getting through
Thanks

 

[Deleted member 265726]

I don't know if I have the answers but what material is the tongue and groove made from?

 

[PortlandBill]

Larch

 

[Notch7]

My Summerhouse is Tongued and grooved
For the past 3 years I have applied 3 coats Ronseal Fencelife plus in Cornflower
The inside I have treated the knots and again every year I apply 4 coats white emulsion
Every year damp comes through
Is there anything I can apply on the outside over the multicoats Ronseal fencelife plus
or
The inside to stop dampness getting through
Thanks

The short answer is: not really.

Single skin timber clad buildings aren’t really built correctly, proper frame construction is a timber frame structure covered in a breathable membrane, then battens are fitted on, then the timber cladding. That creates a cavity so any water ingress gets out.

Log cabin style construction tends to trap water, ship lap and feather edge boarding is better.

 

[Deleted member 265726]

The short answer is: not really.

Single skin timber clad buildings aren’t really built correctly, proper frame construction is a timber frame structure covered in a breathable membrane, then battens are fitted on, then the timber cladding. That creates a cavity so any water ingress gets out.

Log cabin style construction tends to trap water, ship lap and feather edge boarding is better.

Could bitumen be used as a last resort if you don't want to tear down the structure or reconfigure it to the spec above?

*bitumen paint

 

[motorbiking]

Is the building sat on a concrete base? did this base have a DPM?

 

[JohnD]

You say the walls are wet. Do you mean at the bottom, or generally?

Inside or out?

Is the T&G vertical or horizontal?

The gutters and downpipes should be throwing the rain off. Please post photos of them and the wet patches.

 

[PortlandBill]

It is all of the walls.
Downpipes clear

 

[JohnD]

Stand back and take a wider pic of the whole wall please. Right up to the gutters. I'm hoping to see a pattern of damp marks

 

[PortlandBill]

It is the same all over every wall

 

[foxhole]

It is the same all over every wall

Can’t see any photo ?

 

[StephenStephen]

I'm wondering if it's water coming through the grooves, or more condensation happening there because the gaps aren't completely air-tight so they're cooler?

 

[foxhole]

I'm wondering if it's water coming through the grooves, or more condensation happening there because the gaps aren't completely air-tight so they're cooler?

Need to change your medication.

 

[StephenStephen]

Need to change your medication.

Idle musing...

 

[freddiemercurystwin]

It will always leak, the cladding is a rainshield not waterproof.