to scud or not to scud

Eve1

According to the Homebond book a house should be scuded (spelling?) but not alot of plasterers seem to do it anymore. Does it cause any problems if the house isn't scuded?

Eve

mad m

Scuding is part of the process to a final render finish on an outside of a house.Scud is mainly watered down cement that is thrown on the outside of a house to give grip for further coats.

deisemum

Yes it is worth doing. The plasterer that my husband uses always does this.

ctrl-alt-delete

if you ask me you cant do without, when i worked labouring for a few years i saw the benefit of it, gives a much stronger coat of plaster, reduces the risk of hollow patches that can "blow", easy to do and makes the plasterer's job easier - in my opinion.

rooferPete

Hi eve 1,

If the finished blockwork is not given a 2 : 1 sand / cement scud coat there is a very strong possibility that the complete plaster build will not be able to grip the walls and basically fall to the ground over time.

There are very basic rules from the old plastering trade that has never changed even with modern systems :

Wet the walls especially in warm weather / summer.

Apply scud coat (make sure each block gets a good covering).

Wet the walls again to avoid too much suction causing the plaster to dry too fast and crack.

Apply first coat, the old school used to rub up the first coat with a wooden float to seal the paster even though they were going to drag a brush over the plaster to help the second coat to bond.

Wet the walls again to avoid too much suction causing the plaster to dry too fast and crack.

Apply the second coat, another rule was the second coat must not be heavier than the first coat because it could pull the first coat off (gravity).

Bad exterior finishes can be seen everywhere today after the finished wall gets wet (even when painted) you can count the blocks behind the plaster finish (especially chimneys).

I hope the above is some help.

.

yop

Essential, have seen the neighbours house and the plaster is protuding in spots and has wet patches, this is due as said to the plaster not gripping in spots.

It is the lazy way out not to do it.

glaswegian

What does scud consist of and how is it made?

the_pen_turner

sand and cement.
sbr is great through it