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  Rendering

 

It is essential to remove any dirt or grime from the wall. The most efficient way of doing this is hosing the area with a strong jet of water or pressure washer. If there is evidence of mould growth, use a fungicidal wash over the area before starting the repair. If the brickwork still looks shabby after cleaning off the surface, rendering could improve the appearance.

Rendering is a coating of sand and cement. A coating can also contain small stones or chippings, which is called roughcast. This can be a difficult job, best results often applied by an expert. However there is a mix available for the DIY enthusiast, known as Tyrolean rendering, which is a dry mix. Once applied to the surface, allow it to dry before applying a layer of masonry paint.


 
  Condition of the render

 

Cracks If a crack has occurred in the rendering, it could be due to a structural fault. If there are any cracks in the rendering they should be filled. Widen the crack with the point of a trowel or old screwdriver, as this will make a wider area for the filler to key to. Brush away any loose dust or render before applying exterior filler. Press it in well, pushing into the gaps.

‘Blown’ rendering If you tap an area of render and it feels ‘live’, it will probably sound hollow. This means the render is no longer bonded to the wall behind. If it has blown, it appears to bulge and should be broken away carefully to remove all loose render. Brush away any loose dust and widen the area around the edge with the point of a trowel or old screwdriver to improve the bond before applying new render. Use a mortar mixture comprising of cement : building sand in the ratio 1 : 4. Add a little PVA bonding agent to improve the bond with the surface behind. If the render still feels firm, it can be left, but needs to be checked on a regular basis, and replaced if there is a deterioration in the surface bond.

If the patching is obvious and in a very public area, it may be worth considering painting the wall for an attractive alternative finish.


 
  Pebbledash

 

If small stones or chippings are thrown onto the sand and cement mix already applied to the wall surface, the finish is known as a peppledash surface. Pebbledash is a popular surface coat, consisting of a thick base coat covered with a thin coat of render and small stones.

Cracks Small cracks should be filled as with cracks in render.

‘Blown’ pebbledash It could be the thin layer has separated from the thick base coat or the whole surface has separated from the wall behind. Careully break away the loose area and determine the extent of the damage.

If the thin top coat has separated, use a stabiliser to seal the surface and repair the surface. If the damage is through to the wall, replace both surfaces in two stages, allowing the thick base coat to dry before applying the thin pebbled layer.

If the pebbledash is to remain unpainted, try to use some of the original pebbles as replacements. If the patch is too obvious and in a very public area, it may be worth considering painting the wall for an alternative attractive finish.


 
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  Comments
SubjectPosted by Replies Posted at
Forum Topic rendering richardsmiffy1 3 09 Nov 07 at 17:39
Forum Topic render and DPC Goods 4 26 Oct 07 at 20:57
Forum Topic rendering batesy2 3 13 Oct 07 at 10:33
Forum Topic render onto metal lath eastb 4 04 Oct 07 at 21:40
Forum Topic cracks after painting ronron 2 01 Oct 07 at 11:19
Forum Topic repairs needed to tyrolean finish mercer77 2 20 Aug 07 at 13:55
Forum Topic covering pebble dash Davtank 1 18 Aug 07 at 13:36
Forum Topic I beam RSJ rendering Blackrat 2 17 Aug 07 at 12:41
Forum Topic Old Pebble Dash Almosttooold 10 07 Aug 07 at 20:55
Forum Topic render advice chris.r 1 04 Aug 07 at 11:39
Forum Topic Vertical cracks in render gj132 0 28 Jul 07 at 2:26
Forum Topic Rendering/Wet Dash Tromer 7 26 Jul 07 at 18:36
Forum Topic What is the best option to replace wallcoating jonnybegood 1 23 Jul 07 at 0:20
Forum Topic Blown render laig 1 21 Jul 07 at 10:42
Forum Topic Tanking a cellar doddy 2 05 Jul 07 at 17:28
Forum Topic large area render mdbuild 2 23 Jun 07 at 16:29
Forum Topic Lintel choice booky1 7 06 Jun 07 at 18:26
Forum Topic cracks in my pebble dash si.d 3 26 May 07 at 17:52
Forum Topic rendering over pebbledash terence1719 5 23 May 07 at 17:56
Forum Topic rendering denseblock DIYsaster 8 19 May 07 at 21:38
Forum Topic Rendering steps Metalchris 6 17 May 07 at 19:28
Forum Topic rendering big t 09 1 12 May 07 at 7:52
Forum Topic Have you any experience of Homeguard Wallcoatings? pyknicpie 26 12 May 07 at 5:49
Forum Topic tyrolean in tyneside? pattison 2 08 May 07 at 16:04
Forum Topic rendering on blocks ellsbells 9 07 May 07 at 19:06
Forum Topic rendering iosh 1 01 May 07 at 22:32
Forum Topic Renders to House Taupiniere 1 01 May 07 at 10:50
Forum Topic Gravel JHRussell 3 25 Mar 07 at 13:44
Forum Topic Removing Rendering hennerz 1 29 Jan 07 at 18:58
Forum Topic Rendering Sandstone Roper 0 14 Jan 07 at 12:09
Forum Topic rendering a airey house BRUWEB 14 18 Dec 06 at 20:57
Forum Topic rendering on paint douglaslowndes 3 12 Dec 06 at 13:37
Forum Topic Rendering over RSJ TJ.1 2 27 Nov 06 at 13:00
Forum Topic Re Rendering over Lintel Timber Nat33 3 28 Oct 06 at 20:46
Forum Topic pebbledash basic_ally 2 27 Oct 06 at 0:07
Forum Topic Cracked Render Absolute Beginner 5 23 Oct 06 at 14:36
Forum Topic Subsidence SEASIDER52 9 02 Oct 06 at 13:51
Forum Topic how to attach roughcast to mesh (no bricks behind) HOUSEMARTIN 1 16 Aug 06 at 20:46
Forum Topic rendering Gaz 1 3 06 Aug 06 at 8:10
Forum Topic rendering/dashing the base of walls? my-house-is-falling-down 4 05 Aug 06 at 14:33
Forum Topic pebbledash ivecutmyfinger 0 02 Aug 06 at 16:51
Forum Topic Tyrolean finish marshall 3 22 Jul 06 at 12:45
Forum Topic Rendering Breeze Block Retaining Wall humble_beginnings 6 14 Jul 06 at 15:06
Forum Topic Botched new pebbledash, decided to render instead visaria 2 06 Jul 06 at 17:24
Forum Topic cracks in render Celt2 10 26 Jun 06 at 13:41
Forum Topic How do you remove render kiwiboyinoz 3 28 May 06 at 1:43
Forum Topic New Render Melly 0 19 May 06 at 14:59
Forum Topic rendering wallmaster 1 14 May 06 at 12:35
Forum Topic render staz 2 25 Apr 06 at 12:47
Forum Topic manhole cover cracked mazzzy 12 23 Apr 06 at 16:18
Forum Topic Gable end rendering sidneylarkin 3 22 Apr 06 at 7:47
Forum Topic pebbledash karenamy 2 02 Apr 06 at 22:52
Forum Topic Pebble v Shell Dash marinebeach 0 28 Mar 06 at 16:11
Forum Topic rendering cost MrsA 2 01 Feb 06 at 6:51
Forum Topic Plastering tutorial DVD's NOT for sale gaz4266 0 07 Jan 06 at 18:53
Forum Topic Rendering mallday 5 29 Dec 05 at 2:48
Forum Topic Repairing cracks RosanneS 1 09 Dec 05 at 17:11
Forum Topic New House render kevsw 0 13 Nov 05 at 11:12
Forum Topic dashing jonpat 0 09 Oct 05 at 13:40
Forum Topic pebble dash/render dash paulc133 5 26 Sep 05 at 17:02
Forum Topic Exterior render info treefella 21 23 Sep 05 at 17:27
Forum Topic Types of render michaelsimpson25 7 21 Sep 05 at 20:02
Forum Topic removing pebbledash 9inchnails 11 05 Sep 05 at 11:39
Forum Topic Rendering Haven`t a clue 7 03 Sep 05 at 23:24
Forum Topic render query jingles 3 02 Sep 05 at 15:34
Forum Topic Indoors rendering Speewa 3 21 Aug 05 at 10:40
Forum Topic pebbledash cost willlav 1 30 Jul 05 at 23:44
Forum Topic rendering retaining wall matt73 7 24 Jul 05 at 19:07
Forum Topic Stainless steel angle beads. jamborino 3 14 Jun 05 at 21:04
Forum Topic pebbledash herring1 22 15 Mar 05 at 12:24
Forum Topic rendering & tyrolean c&d plastering 5 24 Feb 05 at 11:10
Forum Topic Rendering outdoor aerated blocks deedee9 8 29 Nov 04 at 21:16
Forum Topic Tyrolean rendering - lifetime marcos1 4 08 Aug 04 at 16:12
Forum Topic tyrolean finish jasey 4 25 Apr 04 at 23:17
Forum Topic renering indoors robertmessner 0 13 Apr 04 at 10:33
Forum Topic Pebbledash Syko1941 18 29 Oct 03 at 19:08
Forum Topic pebbledash Anonymous 3 28 Nov 02 at 8:54
Forum Topic Tyrolean Rendering keithperkins 2 21 Oct 02 at 23:23
Forum Topic hanging extenal tiles geraintrees 1 21 Oct 02 at 21:45
Forum Topic Rendering Sandstone Anonymous 1 05 May 02 at 18:04


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