Gerry underwood Posted November 28, 2019 Report Share Posted November 28, 2019 (edited) How much undercoat/ paint would I roughly need for a 59x13 steel widebeam. Not going for perfection but a nice finish. The roof will be being done. Edited November 28, 2019 by Gerry underwood Additional text Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 28, 2019 Report Share Posted November 28, 2019 (edited) 42 minutes ago, Gerry underwood said: How much undercoat/ paint would I roughly need for a 59x13 steel widebeam. Not going for perfection but a nice finish. The roof will be being done. My boat is a 14' widebeam It will depend on what type of paint you choose. Look at the tin (data sheet) and it will tell you how many square metres per litre. Say your boat roof is 20 metres x 4 metres that's 80 sq metres per coat. Example : 2 costs of primer = 160 square metres 2 coats of undercoat = 160 square metres 3 coats of top coat = 240 square metres The paint I've been using is 16.5 sq mts per 2.5 litre can So in the above example I'd need 25 litres of primer 25 litres of undercoat 36 litres of top-coat. You will then need £200 (ish) spending on rollers, brushes, masking tape, gloves etc etc. Edited November 28, 2019 by Alan de Enfield Link to comment Share on other sites More sharing options...
Momac Posted November 28, 2019 Report Share Posted November 28, 2019 31 minutes ago, Alan de Enfield said: Look at the tin (data sheet) and it will tell you how many square metres per litre. Say your boat roof is 20 metres x 4 metres that's 80 sq metres per coat. Example : 2 costs of primer = 160 square metres 2 coats of undercoat = 160 square metres 3 coats of top coat = 240 square metres The paint I've been using is 16.5 sq mts per 2.5 litre can So in the above example I'd need 25 litres of primer 25 litres of undercoat 36 litres of top-coat. Be careful using metric units on this forum ! ? Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 28, 2019 Report Share Posted November 28, 2019 17 minutes ago, MartynG said: Be careful using metric units on this forum ! ? Given the choice I'd rather use 'real money' but the tin quotes Sq Mts / litre Link to comment Share on other sites More sharing options...
sharpness Posted November 28, 2019 Report Share Posted November 28, 2019 (edited) 16.5 sq m per 2.5ltr tin doesn't sound very much, I would have thought 16.5 sq m per 1 ltr would be more like it. A tin of Dulux Satinwood here on the side at home says 17sq m per Ltr. So primer to cover 160 sq m would be 10 rather than 25 Edited November 28, 2019 by sharpness Add a bit Link to comment Share on other sites More sharing options...
Alan de Enfield Posted November 28, 2019 Report Share Posted November 28, 2019 9 minutes ago, sharpness said: 16.5 sq m per 2.5ltr tin doesn't sound very much, I would have thought 16.5 sq m per 1 ltr would be more like it. A tin of Dulux Satinwood here on the side at home says 17sq m per Ltr. So primer to cover 160 sq m would be 10 rather than 25 My primer was 16.5 sq metres per 2.5 litre can. (2.5 litre can was £65 per 2.5 litres) My top-coat (Poly Gloss) is 12 sq metres per can (2.5 litre can was £30 per 2.5 litres) From the Hemple data sheet for the primer : Shade nos/Colours: 13700*/ Grey. (see REMARKS overleaf) Finish: High-gloss Volume solids, %: 100Theoretical spreading rate: 6.6 m2/l [264.7 sq.ft./US gallon] - 150 micron/6 mils But the numbers were just examples & the OP could substitute the information from the can for whatever he decided to use. 1 Link to comment Share on other sites More sharing options...
Bobbybass Posted November 28, 2019 Report Share Posted November 28, 2019 4 hours ago, MartynG said: Be careful using metric units on this forum ! ? Too bloody right.! Measure the boat in chains and cubits like the rest of us !!…..? Link to comment Share on other sites More sharing options...
LadyG Posted November 29, 2019 Report Share Posted November 29, 2019 (edited) Edited November 29, 2019 by LadyG Thickness in microns, Link to comment Share on other sites More sharing options...
blackrose Posted November 29, 2019 Report Share Posted November 29, 2019 A lot will depend on whether you're actually painting the whole boat from bare metal. If the existing paint is basically sound and you're just giving it a key and patch priming/undercoating small areas of rust that you've prepped, then the existing sound keyed paint is your primer and possibly undercoat too. Link to comment Share on other sites More sharing options...
Gerry underwood Posted November 29, 2019 Author Report Share Posted November 29, 2019 5 hours ago, blackrose said: A lot will depend on whether you're actually painting the whole boat from bare metal. If the existing paint is basically sound and you're just giving it a key and patch priming/undercoating small areas of rust that you've prepped, then the existing sound keyed paint is your primer and possibly undercoat too. That is the plan. We are going from Green to Black. Link to comment Share on other sites More sharing options...
bizzard Posted November 29, 2019 Report Share Posted November 29, 2019 Tones of the same colour are always easy on the eye. Dark green, light green, dark blue, light blue, Dark grey, light grey for example, avoid reds altogether. Link to comment Share on other sites More sharing options...
LadyG Posted November 29, 2019 Report Share Posted November 29, 2019 2 hours ago, bizzard said: Tones of the same colour are always easy on the eye. Dark green, light green, dark blue, light blue, Dark grey, light grey for example, avoid reds altogether. Tonnes? Black ................. everywhere? Link to comment Share on other sites More sharing options...
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