I have car port which was put up when the house was built in 1968 and uses
rafters that are bolted to my house and my neighbours. There is one corner
that is not bolted to my house or my neighbours and the previous owner has
stuck a plastic shield over the neighbours facing side.

When going to clean the car port, I found in that corner the wood had started
to rot top and bottom against that plastic shield side.

Due its position and the deepness of the holes, I used Soudal Expanding Foam
to fill the holes. After 5 days the foam even though dry is still spongy.

The can says it OK for exterior use and be sanded or plastered. So how can I
fix this problem?

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for full context, visit https://www.homeownershub.com/uk-diy...d-1383237-.htm

On Friday, 13 September 2019 12:14:04 UTC+1, AndyTriumpH wrote:
I have car port which was put up when the house was built in 1968 and uses
rafters that are bolted to my house and my neighbours. There is one corner
that is not bolted to my house or my neighbours and the previous owner has
stuck a plastic shield over the neighbours facing side.

When going to clean the car port, I found in that corner the wood had started
to rot top and bottom against that plastic shield side.

Due its position and the deepness of the holes, I used Soudal Expanding Foam
to fill the holes. After 5 days the foam even though dry is still spongy.

The can says it OK for exterior use and be sanded or plastered. So how can I
fix this problem?

Remove the foam - it will always be spongy, cos that's what it is.

If accessible enough, cut out the rotten section & join new timber in.


NT

Chris Hogg wrote:
On Fri, 13 Sep 2019 11:02:25 -0700 (PDT), wrote:

On Friday, 13 September 2019 12:14:04 UTC+1, AndyTriumpH wrote:
I have car port which was put up when the house was built in 1968 and uses
rafters that are bolted to my house and my neighbours. There is one corner
that is not bolted to my house or my neighbours and the previous owner has
stuck a plastic shield over the neighbours facing side.

When going to clean the car port, I found in that corner the wood had started
to rot top and bottom against that plastic shield side.

Due its position and the deepness of the holes, I used Soudal Expanding Foam
to fill the holes. After 5 days the foam even though dry is still spongy.

The can says it OK for exterior use and be sanded or plastered. So how can I
fix this problem?

Remove the foam - it will always be spongy, cos that's what it is.

If accessible enough, cut out the rotten section & join new timber in.


Didn't see the original message, but yes, dig out the foam and any
remaining rotten wood, use Ronseal wet rot wood hardener to harden up
the wood surrounding the cavity, and then Ronseal wood filler to fill
it. https://tinyurl.com/y26x9tz5 and https://tinyurl.com/y3gsg8ux Sand
to a smooth finish, paint etc.


Chris advice is probably ok for small areas- the Ronseal stuff is good.
However, if the holes are large enough to weaken the structure, you need to
replace the wood. You dont want the thing falling down on someone or your
car.

If it is structural, I'd certainly not be using foam. Threat the wood, cut
out the rot or whatever, make sure you can still have enough left to be
strong enough to hold it up!.
Really I'd not want to use foam cosmetically this way.
Brian

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"AndyTriumpH" m wrote in
message oupdirect.com...
I have car port which was put up when the house was built in 1968 and uses
rafters that are bolted to my house and my neighbours. There is one corner
that is not bolted to my house or my neighbours and the previous owner has
stuck a plastic shield over the neighbours facing side.

When going to clean the car port, I found in that corner the wood had
started
to rot top and bottom against that plastic shield side.
Due its position and the deepness of the holes, I used Soudal Expanding
Foam
to fill the holes. After 5 days the foam even though dry is still spongy.

The can says it OK for exterior use and be sanded or plastered. So how can
I
fix this problem?
--
for full context, visit
https://www.homeownershub.com/uk-diy...d-1383237-.htm

On 13/09/2019 12:14, AndyTriumpH wrote:

I used Soudal Expanding
Foam
to fill the holes. After 5 days the foam even though dry is still spongy.

The can says it OK for exterior use and be sanded or plastered. So how
can I
fix this problem?

It's a light weight expanding foam designed to fill holes/voids and not
to form a structural repair on a supporting beam or leg. The cured foam
is full of air pockets and will be easily pushed in with a finger. Any
excess can easily be cut away with a saw or knife.

As others have written you may have been better off using the Ronseal
Wet Rot hardener on first on the damaged/rotten wood


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