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Repair Cracks in Cement Rendering
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Davidm
Aug 24, 2015, 10:15:38 AM8/24/15
to
Victorian semi, large south facing wall, smooth rendered and painted.
Has some cracks that need repairing before I repaint it. The cracks
aren't huge, 1-2mm wide, probably full depth of render. Just caused by
natural movement from the heat of the sun, most of the neighbours
walls have the same problem, and surveyor says nothing to be concerned
about. No point in filling with mortar, it will just crack again.
Was thinking of doing the following:
Brush out any loose render, dust etc
Apply some stabilising solution/sealant, or maybe diluted pva?
When dry fill with paintable flexible frame sealant?
Use wet sponge to blend in and slightly stipple the surface
Paint with regular Sandtex or similar.
Does this seem reasonable, or any better suggestions?
Has some cracks that need repairing before I repaint it. The cracks
aren't huge, 1-2mm wide, probably full depth of render. Just caused by
natural movement from the heat of the sun, most of the neighbours
walls have the same problem, and surveyor says nothing to be concerned
about. No point in filling with mortar, it will just crack again.
Was thinking of doing the following:
Brush out any loose render, dust etc
Apply some stabilising solution/sealant, or maybe diluted pva?
When dry fill with paintable flexible frame sealant?
Use wet sponge to blend in and slightly stipple the surface
Paint with regular Sandtex or similar.
Does this seem reasonable, or any better suggestions?
tabb...@gmail.com
Aug 24, 2015, 5:51:38 PM8/24/15
to
NT
The Natural Philosopher
Aug 24, 2015, 7:12:01 PM8/24/15
to
> NT
>
--
New Socialism consists essentially in being seen to have your heart in
the right place whilst your head is in the clouds and your hand is in
someone else's pocket.
tabb...@gmail.com
Aug 25, 2015, 3:51:48 AM8/25/15
to
On Tuesday, 25 August 2015 00:12:01 UTC+1, The Natural Philosopher wrote:
NT
> On 24/08/15 22:51, nt wrote:
> > On Monday, 24 August 2015 15:15:38 UTC+1, Davidm wrote:
> >> Victorian semi, large south facing wall, smooth rendered and painted.
> >> Has some cracks that need repairing before I repaint it. The cracks
> >> aren't huge, 1-2mm wide, probably full depth of render. Just caused by
> >> natural movement from the heat of the sun, most of the neighbours
> >> walls have the same problem, and surveyor says nothing to be concerned
> >> about. No point in filling with mortar, it will just crack again.
> >>
> >> Was thinking of doing the following:
> >>
> >> Brush out any loose render, dust etc
> >> Apply some stabilising solution/sealant, or maybe diluted pva?
> >> When dry fill with paintable flexible frame sealant?
> >> Use wet sponge to blend in and slightly stipple the surface
> >> Paint with regular Sandtex or similar.
> >>
> >> Does this seem reasonable, or any better suggestions?
> >
> > You could fill with pretty much anything.
> >
> >
> decorators caulk. Its waterproof enough if painted.
I wouldn't, but you could
> > On Monday, 24 August 2015 15:15:38 UTC+1, Davidm wrote:
> >> Victorian semi, large south facing wall, smooth rendered and painted.
> >> Has some cracks that need repairing before I repaint it. The cracks
> >> aren't huge, 1-2mm wide, probably full depth of render. Just caused by
> >> natural movement from the heat of the sun, most of the neighbours
> >> walls have the same problem, and surveyor says nothing to be concerned
> >> about. No point in filling with mortar, it will just crack again.
> >>
> >> Was thinking of doing the following:
> >>
> >> Brush out any loose render, dust etc
> >> Apply some stabilising solution/sealant, or maybe diluted pva?
> >> When dry fill with paintable flexible frame sealant?
> >> Use wet sponge to blend in and slightly stipple the surface
> >> Paint with regular Sandtex or similar.
> >>
> >> Does this seem reasonable, or any better suggestions?
> >
> > You could fill with pretty much anything.
> >
> >
> decorators caulk. Its waterproof enough if painted.
NT
Brian-Gaff
Aug 25, 2015, 4:33:41 AM8/25/15
to
Have you tapped it to see if its blown, ie hollow sounding and hence no
longer attached to the underlying wall.
It might not be what you want to hear, but I had to have several feet of
this removed and re rendered as nothing was holding it on in some places.
One supposes it was water getting behind it and freezing etc.
Brian
--
From the Sofa of Brian Gaff Reply address is active
"Davidm" <davidm_...@hotmail.com> wrote in message
news:d49mta5vc69mv6a4j...@4ax.com...
longer attached to the underlying wall.
It might not be what you want to hear, but I had to have several feet of
this removed and re rendered as nothing was holding it on in some places.
One supposes it was water getting behind it and freezing etc.
Brian
--
From the Sofa of Brian Gaff Reply address is active
"Davidm" <davidm_...@hotmail.com> wrote in message
news:d49mta5vc69mv6a4j...@4ax.com...
Davidm
Aug 25, 2015, 5:18:02 AM8/25/15
to
On Tue, 25 Aug 2015 09:33:37 +0100, "Brian-Gaff"
<bri...@blueyonder.co.uk> wrote:
>Have you tapped it to see if its blown, ie hollow sounding and hence no
>longer attached to the underlying wall.
> It might not be what you want to hear, but I had to have several feet of
>this removed and re rendered as nothing was holding it on in some places.
>One supposes it was water getting behind it and freezing etc.
> Brian
It's not blown - yet, which is why I want to repair it now before the
<bri...@blueyonder.co.uk> wrote:
>Have you tapped it to see if its blown, ie hollow sounding and hence no
>longer attached to the underlying wall.
> It might not be what you want to hear, but I had to have several feet of
>this removed and re rendered as nothing was holding it on in some places.
>One supposes it was water getting behind it and freezing etc.
> Brian
water gets in and freezes.
stuart noble
Aug 25, 2015, 6:27:02 AM8/25/15
to
mortar) but the 2 part Profil from Toolstation works pretty well IME
JimK
Aug 25, 2015, 8:17:09 AM8/25/15
to
/Does this seem reasonable, or any better suggestions? /Q
1-2 mm? Paint em closed w the masonry paint?
Can't see how anything (especially 2 part filler) is going to penetrate any further than a few coats of paint? Never mind being up a ladder...
Jim K
1-2 mm? Paint em closed w the masonry paint?
Can't see how anything (especially 2 part filler) is going to penetrate any further than a few coats of paint? Never mind being up a ladder...
Jim K
stuart noble
Aug 25, 2015, 3:32:41 PM8/25/15
to
JimK
Aug 25, 2015, 6:06:15 PM8/25/15
to
"EVERBUILD PRO-FILL is a 2 part high performance multi-purpose filler, consisting of a grey coloured polyester paste with a Benzoyl Peroxide hardener. When cured, PRO-FILL forms a strong hard mass which offers excellent abrasion resistance and durability. PRO-FILL is suitable for use on timber, metal shuttering, concrete and GRP
Specification
BENEFITS;
- Simple to mix.
- Impact resistant.
- Fast curing.
- Water and oil resistant once cured.
- High strength. "
Sounds exactly like car body filler..
Wonder how much cracking you'd fill after you got up the ladder before it all cured on you?
Nah
Jim K
Specification
BENEFITS;
- Simple to mix.
- Impact resistant.
- Fast curing.
- Water and oil resistant once cured.
- High strength. "
Sounds exactly like car body filler..
Wonder how much cracking you'd fill after you got up the ladder before it all cured on you?
Nah
Jim K
stuart noble
Aug 26, 2015, 3:51:51 AM8/26/15
to
hardener, so no need to be too accurate.
Yes, same as car body filler, but cheaper, and I would guess has a
higher resin to aggregate ratio. Not a good idea to have a pale coloured
hardener though. Red would have been better.
Davidm
Aug 26, 2015, 4:31:33 AM8/26/15
to
On Tue, 25 Aug 2015 15:06:12 -0700 (PDT), JimK <jk98...@gmail.com>
wrote:
High strength - just what I don't need, or within a few months there
will be new cracks opening up as the wall continues to move.
wrote:
will be new cracks opening up as the wall continues to move.
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