Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

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On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

Depends a bit on the size of sheet of ply. For large sheets you will
need something like a PU foam adhesive - you can get "board fix"
adhesives in cans similar to normal expanding foam.

Smaller bits of wood with a close fitting gap, you may be able to fix
with contact adhesive.



--
Cheers,

John.

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Iain wrote:

Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.

I would strongly (geddit?) recommend this stuff

http://www.ct1ltd.com/our-products/ct1/

alternatively look at various tests done by this chap

https://www.youtube.com/user/ultimatehandyman/videos

On 06/09/18 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

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Car body filler


--
"Nature does not give up the winter because people dislike the cold."

ۥ Confucius

On Thursday, 6 September 2018 11:33:22 UTC+1, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

There are specialist adhesives at a price. Usually people don't want the best, they want something that does the job & ideally they already have. PU, epoxy, car body filler, hilti gun, etc. Not PVA, it doesn't do gaps. Silicone could work if you use a lot of it. If it's a damp floor most adhesives will fail.


NT

On Thu, 6 Sep 2018 11:33:54 +0100, Iain
wrote:

Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.

When fitting out my 20' x 10' concrete sectional garage / workshop I
cut many 6" lengths of 4x2" sawn timber and glued each of them with
the real Gripfill to the inside of each panel (so top, middle and
bottom).

I then hung 8 x 4 sheets of 1/2" ply on top of each of the blocks and
then added slotted racking uprights at each position and loaded the
shelves ... and they have all been there 20+ years now. ;-)

After sticking the blocks on one panel and leaving them to cure
overnight, I was able to stand on the bottom one and hang off the
other two and noting moved (so I carried on with the rest). ;-)

After applying the Gripfill and pushing them into place, I just rested
some lengths of wood up against them to stop them moving whilst they
cured.

Cheers, T i m

"Iain" wrote in message news
Looking for advice on the best method of fastening plywood to concrete. I'm reluctant
to drill into the concrete, so recommendations for suitable adhesives please.
This is for the inside of a concrete sectional garage and will be non-loadbearing.
TIA
Iain


Personally I'd glue battens to the concrete which is a lot easier and cheaper and would
provide an air gap which would provide insulation in itself or could be filled. This
would
also make removal easier as well if this ever became necessary. Then screw the plywood
onto the battens.


michael adams

.....

On 06/09/18 11:56, wrote:
On Thursday, 6 September 2018 11:33:22 UTC+1, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

There are specialist adhesives at a price. Usually people don't want the best, they want something that does the job & ideally they already have. PU, epoxy, car body filler, hilti gun, etc. Not PVA, it doesn't do gaps. Silicone could work if you use a lot of it. If it's a damp floor most adhesives will fail.

So, eventually, will the plywood if it's not marine ply or otherwise
waterproof.

--

Jeff

On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.

Best building adhesive I've found for sticking wood to walls is
gun-grade expanding foam (low expansion stuff)

I've used it for skirting boards, sticking un-supported insulation into
the cavities under window openings etc.
Couple of tips. give the 2 substances to be joined a quick misting with
plant sprayer etc to speed up curing and give foam a few minutes to
start expanding slightly before pressing boards into place.
Bit like contact adhesive, I found it best to allow slight expansion and
thickening of the foam as just pressing the 2 components together right
away doesn't give enough foam substance to make an effective joint also
keeping pressure on the boards once positioned reduces further outward
expansion of the foam.
I wouldn't try it with anything other than low expansion/volume foam
though as it will almost certainly push the boards away from the wall.

On Thursday, 6 September 2018 12:37:02 UTC+1, Jeff Layman wrote:
On 06/09/18 11:56, tabbypurr wrote:
On Thursday, 6 September 2018 11:33:22 UTC+1, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete..
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

There are specialist adhesives at a price. Usually people don't want the best, they want something that does the job & ideally they already have. PU, epoxy, car body filler, hilti gun, etc. Not PVA, it doesn't do gaps. Silicone could work if you use a lot of it. If it's a damp floor most adhesives will fail.

So, eventually, will the plywood if it's not marine ply or otherwise
waterproof.

yes, but rather large difference in timescale. PU can turn to gloop in a month on a wet floor.


NT

Iain Wrote in message:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA

Are these the concrete panels with recesses on the inside?

If its reliably dry inside this garage, I'd go with an MS polymer
e.g. Stixall, or Sika Multistick from Toolsatan amongst others.

If space is at a premium i might try to stick the plywood
straight to the concrete panels, if they have recesses that will
allow air to circulate a bit if a 1" say gap is left at top and
bottom of plywood, negating any advantage from battening.

--
--
Jim K


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Not had much luck with that, concrete surface just comes away on the glue
after a while I find.
Brian

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"Iain" wrote in message
news
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for suitable
adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

---
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https://www.avast.com/antivirus

On Thursday, 6 September 2018 15:14:34 UTC+1, Jeff Layman wrote:
On 06/09/18 13:42, tabbypurr wrote:
On Thursday, 6 September 2018 12:37:02 UTC+1, Jeff Layman wrote:
On 06/09/18 11:56, tabbypurr wrote:
On Thursday, 6 September 2018 11:33:22 UTC+1, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

There are specialist adhesives at a price. Usually people don't want the best, they want something that does the job & ideally they already have.. PU, epoxy, car body filler, hilti gun, etc. Not PVA, it doesn't do gaps. Silicone could work if you use a lot of it. If it's a damp floor most adhesives will fail.

So, eventually, will the plywood if it's not marine ply or otherwise
waterproof.

yes, but rather large difference in timescale. PU can turn to gloop in a month on a wet floor.

What PU are we talking about here? I only ask because I have some marine
ply roofing over a wood store, and it has had 3 coats of PU varnish to
waterproof it. I'm not convinced that the varnish is completely
waterproofing the ply as sometimes a few small damp patches appear when
it rains. Would it be the same or a different PU from the glue?

It was PU glue from screwfix or toolsatan. Might have been gorilla brand, not sure. I glued vinyl tiles to a slab - a month later the glue was just gloop. PU is not fully waterproof, it's fine if it dries out but if it stays wet for a couple of weeks it's had it.

Your situation may be due to condensation.


NT

On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Gentlemen, I must apologise for lack of response to your suggestions. I
did reply to most of you but, using Thunderbird, I hit reply instead of
Reply All.

For clarity, the concrete in question is Sectional Garage with recesses
in the panels. I wish to put some insulation in the cavities and plywood
on top. Unfortunately space is tight and there is no room for a framework.
Cheers,
Iain

Iain wrote:

Gentlemen, I must apologise for lack of response to your suggestions. I
did reply to most of you

I did wonder if that was intentional, or not.

but, using Thunderbird, I hit reply instead of
Reply All.

Can I suggest that you right click the small toolbar at the top/right of
the message page, choose "customise" and then drag the "smart reply"
button off the toolbar, and drag the "reply" button on in its place, the
behaviour is more what people expect ...

On Thu, 6 Sep 2018 17:57:37 +0100, Iain
wrote:

On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.

snip

For clarity, the concrete in question is Sectional Garage with recesses
in the panels.

Exactly like mine then.

I wish to put some insulation in the cavities and plywood
on top.

Exactly as I did then.

Unfortunately space is tight and there is no room for a framework.

Which is exactly why (20 years ago) I glued 6" lengths of 4x2" into
each panel with Gripfill, put the insulation around and the ply over
the top.

Because my panels were 2' wide and the play 8x4', placing the blocks
in the middle of each panel gave me 2' increments and using H section
ally sections between the panels, a very nice and sealed finish.

Cheers, T i m

In article , Iain
writes
On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.
TIA
Iain

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Gentlemen, I must apologise for lack of response to your suggestions. I
did reply to most of you but, using Thunderbird, I hit reply instead of
Reply All.

For clarity, the concrete in question is Sectional Garage with recesses
in the panels. I wish to put some insulation in the cavities and plywood
on top. Unfortunately space is tight and there is no room for a framework.
Cheers,
Iain
I did something similar 4 years ago; I used plasterboard with foam
backing (Knauf, which had about 15mm of foam in one side so there was
some insulation plus a vapour barrier)
.. Stuck it directly on the raised parts of the concrete sections using
'no more nails' type of adhesive. Worked well.
--
Chris Holford

On 06/09/2018 13:18, www.GymRatZ.co.uk wrote:
On 06/09/2018 11:33, Iain wrote:
Looking for advice on the best method of fastening plywood to concrete.
I'm reluctant to drill into the concrete, so recommendations for
suitable adhesives please.
This is for the inside of a concrete sectional garage and will be
non-loadbearing.

Best building adhesive I've found for sticking wood to walls is
gun-grade expanding foam (low expansion stuff)

I've used it for skirting boards, sticking un-supported insulation into
the cavities under window openings etc.
Couple of tips. give the 2 substances to be joined a quick misting with
plant sprayer etc to speed up curing and give foam a few minutes to
start expanding slightly before pressing boards into place.
Bit like contact adhesive, I found it best to allow slight expansion and
thickening of the foam as just pressing the 2 components together right
away doesn't give enough foam substance to make an effective joint also
keeping pressure on the boards once positioned reduces further outward
expansion of the foam.
I wouldn't try it with anything other than low expansion/volume foam
though as it will almost certainly push the boards away from the wall.



+1.

I would use a few mechanical fixings if possible, though, if only to
hold it firmly in place while it sets, and give some degree of hold in
case of fire.

--
Cheers, Rob

On 06/09/2018 19:48, T i m wrote:
On Thu, 6 Sep 2018 17:57:37 +0100, Iain
wrote:

snip

Unfortunately space is tight and there is no room for a framework.

Which is exactly why (20 years ago) I glued 6" lengths of 4x2" into
each panel with Gripfill, put the insulation around and the ply over
the top.


That's slightly reassuring - my main concern with gluing buildings
together is the life of the glue.

I think my house will pretty much fall down if the expanding foam loses
its stick :-)


--
Cheers, Rob