2.5 Litres White Johnstones Professional Undercoat Timber & Sheet Materials-7 Timber roofs should have the

Timber roofs should have the first layer of felt nailed down in accordance with BS Code of Practice 144

A thick film is necessary for maximum effectiveness

Drying times will vary depending on weather conditions

Thickness: The thickness of the hinge (e

2.5 Litres White Johnstones Professional Undercoat Timber & Sheet Materials-7 Timber roofs should have thePREPARATION: All surfaces to be painted should be clean, dry and free from loose and flaking material. Prime bare surfaces with the appropriate Johnstones Primer. Rub down previously painted surfaces with fine waterproof abrasive paper and rinse thoroughly. Avoid the inhalation of dust. Wear a suitable face mask if dry sanding. Special precautions should be taken during surface preparation of pre 1960s paint surfaces over wood and metal as they may