The ‘latest’, ‘hi tec’ boat supplies products often
come with high advertising mark-up.
Traditional boat building products which have been successfully used for generations are usually the cheapest option.
Fortunately we now have the internet where you can find boat supplies.
If you are looking for a Wooden Boat or Boat Bits or you have any Boats or Bits to sell. Visit The Exchange.
Before deciding on the timber you intend to use it is worth checking what supplies are available in you area.
Any lumber of sufficient widths, lengths and quality that you can’t find locally will incur the extra expense of ordering, delivery and transport.
For most boat building you will want good quality seasoned and sustainable timber.
It will need to be free of heartwood and sapwood and as clear of knots as possible.
Air dried wood is rare these days but kiln dried is just as good. In some ways kiln dried, because the drying process is controlled can be better.However it is a good idea to allow kiln dried wood to acclimatise before use.
However there are varying grades within the term ‘marine plywood’.
And naturally enough they vary in price. It is possible to use cheaper grades of plywood in marine construction as long as it is completely sealed with epoxy resin.However epoxies aren’t cheap, the extra you spend on epoxy might negate any savings you make on wood. And remember that old saying about the ship being lost for the sake of a nail.
Where it is going to be used.
What degree of exposure will it receive?
Will it be easy to repair?
What are the health risks?
The corrosion of metal fastenings is complex. It can vary depending on the type of wood it is in contact with and the amount it is exposed to water.
Of the available fastenings silicon bronze is the most suitable to use below the waterline.
Stainless steel is stronger harder and a little cheaper than silicon bronze.
However, the usual 304 type of stainless is not suitable for underwater fittings except perhaps for small boats which do not spend much time in the water.
Hot dipped galvanized fastenings are fine for large boats.
But, they will bleed and corrode, besides they are not easily obtained these days in supplies of good quality.
Care must be taken not to damage the galvanizing for the surface.
Brass screws will not last long if used below the waterline.
Monel is probably the best material for fastenings in a marine environment but it is expensive and supplies are difficult to obtain.
Copper is the material of choice for rivets roves and clench (clout) nails.
Silicon bronze gripfast nails are the best choice for other nailing applications.
With the increasing popularity of DIY boat building techniques such as ‘stitch and glue’ and ‘strip planking’ supplies of several epoxy systems are now available to the amateur builder.
Before embarking on a large project it is worth making sure that you are not allergic to epoxies.
And read and take notice of the safety precautions on the packet.
Resins come in differing viscosities, depending on whether you are using them for a thin, even coat of epoxy over wood or for a thicker application.
Epoxy Resins contain Bisphenol A.
Before using traditional petrolium based epoxies you should consider the flood of new scientific evidence on adverse effects of BPA.
However, there are many types of filler available for thickening and for making fillets and general filling.Most folk just mix in some sawdust.
Many come with differing hardeners for fast, medium or slow curing.
The rate of cure can be altered by adjusting the amount of hardener.
‘Blush’ a thin waxy layer that develops on the surface of the epoxy as it cures will need to be washed off and sanded before re-coating.
Acetone can be used as a good degreaser and cleaner but it is very volatile, flammable, and not always easily obtained.
Vinegar is a safer option especially for cleaning epoxy resin from human skin.
Some systems can be bought as a starter pack containing all those essential extras such as mixing sticks.
Glass matting, tape and fabric is available in varying sizes and types of differing applications.
will also need rollers,
brushes, gloves, copper wire, pots for mixing, mixing sticks and
A good paint job will transform the appearance of even the tattiest of old boats.
‘Marine’ paints and varnishes contain additives which increase their durability within the marine environment.
It is possible to use good quality exterior house paints.
However, these will, depending on how much time the boat spends in the water, need to be repainted more often.
I’m a great believer in using good old cheap creosote to treat bare timber.
This, when it has dried, can then be painted with oil based paint.
Bare wood should be primed and then several coats of a good quality marine undercoat applied, sanding between coats.
How much you are willing to spend on the quality of the top coat will depend on how often you are prepared to repaint.
Bottom paint or anti foul paint is applied to keep algae and barnacles from growing on the boat hull.
This is only necessary for boats which spend much of their time in the water.
Most supplies of anti-foul paints available today are designed to be environmentally friendly.Back to Top of Page.
There are numerous sealants and caulking compounds available in the boat supplies market.
However, there are different types for different purposes.
Most of the common Silicone sealants won’t cure under paint or water and they’re not intended or suitable for use below the waterline.
However, they are perfect for sealing around edges such as port lights, deck hardware and other topside applications.
If you are planning to use traditional putty for caulking, you will also need those unusual substances such as red led powder and caulking cotton.
Oakum is hemp soaked in tar oil for larger seams normally for work boats.
As an alternative there are several patented Seam Compounds which have been tried and tested.
These will remains durable and flexible, after immersion to absorb expansion and contraction of planks.
They must be applied over properly primed surfaces.
The mating surfaces between bolted wood joints must be bedded, preferably with a compound which allows for easy removal and is flexible.
While I must admit to being cavalier about work safety it is in your own interests to invest in appropriate protective clothing.
Safety gear for boat building is easily obtained from any hardware store.
Safety on the water and especially at sea is something I am keen on.
Having put a lot of time and effort into building that boat of yours, the last thing you need is an accident when she is launched.
Safety is about more than boat supplies such as life jackets and the like which, can be bought in any chandlery.
It is also about knowing what you are doing on the water.