The render will not adhere to the blackjack unless it had kiln dried sand thrown at it whilst still wet to provide a decent key. I would dry line using metal framing which is cheap and easy, then either board and skim, or moisture Resistant boards, then tape and fill.
Can you render over DPM?
As we’ve mentioned, these damp proofing membranes come with a mesh that allows you to render directly onto them. The mesh provides an excellent key so you can plaster straight onto it. The recommended plaster for a Mesh Membrane is Tarmac Whitewall One Coat.
How long does Black Jack DPM take to dry?
Yes it will fully dry, needs at least 48 hours to throughly dry & it does smell, used it to water proof a internal wall before rendering.
Can you plaster over liquid DPM?
If you want to plaster over it, apply at least two coats and chuck some sand at the top coat as a plaster key.
Does blackjack paint dry?
A minimum of two coats of EVERBUILD® BLACK JACK® 901 BLACK BITUMEN PAINT should be applied. The first coat should be allowed to dry (normally 2-4 hours depending on weather conditions) before the second coat is applied.
Will re rendering stop damp?
Render. … Like the external wall insulation mentioned above, rendering isn’t cheap – but the render will form a protective waterproof barrier on the external walls, repelling water and preventing water ingress in future. It can also really smarten up your property.
Can I use black jack on wood?
It is resistant to low concentrations of alkalis and acids and can withstand prolonged oxidation. It is suitable for application to a wide variety of materials including iron and steel, lead, zinc, aluminium, asbestos – cement, concrete, stone, wood, felt and brick and is mainly used for : … Overcoating felt/wood.
What is Black Jack waterproofing?
PRODUCT DESCRIPTION. EVERBUILD® BLACK JACK® 908 D.P.M. is an odourless rubber-enriched bitumen emulsion which provides a highly effective sandwich dampproof membrane for floors. Also acts as a waterproofer for walls, above ground structures and foundations.
How long does it take for DPM to dry?
How long does liquid DPM take to dry? As long as the application temperature is observed RFC’s DPM can be dry in as little as 12 hours. The maximum drying time is 48 hours.
Can you plaster over Black Jack DPM?
Allow at least 48 hours before plastering or rendering (at least 6mm thickness) NOTE if gloss or alkyd paints are to be used as a decorative finish, the plaster over the BLACK JACK DPM must be applied in two coats to give a minimum total thickness of 15mm.
How long after damp proofing can you plaster?
The BBA certificates for certified damp proofing products state that new wall plaster should not be applied for at least 14 days after the injection of a remedial damp proof course. Indeed in the damp proofing industry’s own Code of Practice it states that “walls will take at least 6 to 12 months to dry out.
Does bitumen paint crack?
Bitumen used as paint isn’t prone to peeling off, and it sticks the surface of the substrate together. It lasts extremely well out of the sun, and well in the sun when on a firm porous surface such as masonry. When it has no hard immovable substrate under it it tends to crack & split over time.
How long does blackjack paint last?
24 months from date of manufacture in tightly sealed, undamaged containers.
What is blackjack paint used for?
Black Bitumen Paint is weatherproof protection for all metals, corrugated iron, gutters and railings. Black Bitumen Paint can also be used for instantly waterproofing wood, brick, concrete, masonry, fall pipes and felt. 5m2 coverage per litre for non porous surfaces. Not suitable for drinking water tanks.